Interesting Plants by Dr. Whitcomb

Created the connecting-pot technique for studying the relationships and interactions of roots of diverse species of plants (1966).  A bareroot tree was placed in one container with four roots extending through holes in the sidewall and into additional containers.  The root between the containers was wrapped with sphagnum moss and black plastic.  

Whitcomb, Carl E., Eliot Roberts and Roger Landers, 1969, A Connecting Pot Technique for Root Competition Investigations Between Woody Plants or Between Woody and Herbaceous Plants.  Ecology, volume 50, pages 326-329

First to observe that by girdling a tree root, downward flow of sugars is restricted just as occurs above ground (1967).  (This critical observation led to the Knit Fabric In-Ground Container and 5-gallon RootBuilder™ Grounder technology we have today.)

Whitcomb, Carl. E. 1985.  Innovations and the Nursery Industry.  Journal of Environmental Horticulture, volume 3, pages 33-38

First to discover that tree roots can be just as restrictive to grass roots as grass roots are to roots of young trees (1968).  Tree-grass interactions are well known today.

Whitcomb, Carl E. 1969, Competition between Trees and Turfgrasses.  Proceedings Southern Nursery Research Conf.  Volume 13, page 62.  Also, Whitcomb, Carl E. 1972.  Influence of Tree root Competition on Growth Response of Four Cool Season Turfgrasses.  Agronomy Journal, volume 64, pages 355-359.  And, Whitcomb, Carl E. 1973.  Competition Between Established Tree Roots and Newly Seeded Kentucky Bluegrass.  Agronomy Journal, volume 65, pages 126-129 

First to discover that very low water solubility was the key to successful use of preemergent herbicides on container nursery stock (1969, with student Stanley Dean and Dr. Charles Conover). 

Dean, Stanley, Carl Whitcomb and C.A. Conover.  1970.  Effects of Media and Container Type on Herbicidal Activity in Container Grown Woody Ornamentals.  Proc. Fla. State Horticultural Society, volume 83, pages 502-507 

First to create containers with sidewall openings in an attempt to improve aeration of the growth medium and air-root-prune.  (But it did not work since we now know that air is drawn into the mix from the top of the container, not the sides and that openings in the sidewall must be strategically placed to accomplish air-root-pruning.  However, this container was copied and manufactured by Nursery Supplies for many years.) 

Whitcomb, Carl E., 1971, Effects of Container Sidewall Porosity, Growth Media and Presence or Absence of Micronutrient Fertilizer on Root and Top Growth of Carissa grandiflora.  Proc. Southern Nursery Research Conf. volume 17, page 1 

First to propagate cuttings using antitranspirant coatings over the leaves instead of mist (1969-1971, with students Jerry Southwell, Worth Axier, Lonnie Davis and Gerald Swan). 

Davis, Lonnie T, and Carl E. Whitcomb, 1970, Asexual Propagation Without Mist.  Proceedings of the Southern Nursery Research Conf. volume 15, page 45.  Also, J.S. Southwell, H.W. Axier, G.W. Swan and Carl E. Whitcomb, 1971, Propagation of Semi-Hardwood Cuttings Using Antitranspirants and No Mist.  Proc. Southern Nursery Research Conf.  volume 17, pages 64-65 

First to discover that early root pruning of the taproot soon after seed germination could stimulate desirable root branching (with students, Jon Rackley, David Stoner, Randy Davis and others, 1969-1974). 

Davis, Randy E. and Carl E. Whitcomb.  1975.  Effects of Propagation Container Size on development of High Quality Tree Seedlings.  Proc. Int. Plant Propagators Soc. volume 25, pages 448-453 

First to accomplish air-root-pruning of tree seedlings by using bottomless quart milk cartons on wire benches (with graduate students, Dave Stoner, Jon Rackley, Richard Sanger, Robert Burns, Craig Chambers, Robert Hathaway and others, 1968-1976). 

Hathaway, Robert D. and Carl E. Whitcomb.  1977.  Propagation of Quercus Seedlings in Bottomless Containers with Osmocote.  Journal of Arboriculture, volume 3, pages 208-212 

First determine that broadleaf trees and shrubs are much more effective at reducing noise transfer in the landscape than conifers.  1972, with student Jacob Stowers. 

Whitcomb, Carl E. and Jacob Stowers, 1973, Sound Abatement With Hedges, HortScience, volume 8, pages 128-129 

First to direct stick cuttings in small containers and observe greater uniformity of rooting and ease of transplanting compared to sticking cuttings in large beds or bulk flats (1969, with students Jon Rackley, Roger Bean and Mark Bisher).  Direct sticking of cuttings in individual containers is almost universally used today. 

Whitcomb, Carl E., Jon G. Rackley and Roger Bean.  1975.  The Effects of Multiple Liners per Container on Growth and Visual Grade of Woody Ornamental Plants.  Nursery Research Journal, volume 3, pages 1-13 

First to show that the reason various northern conifers (Taxus, white pine, Mugo pine, blue spruce and white fir) grew poorly in Florida and the Deep South was due to photoperiod, 1969-1970. 

Whitcomb, Carl E. and J.N. Joiner, 1970, Growth of Northern Conifers in Florida.  The Florida Nurseryman, volume 15, pages 7 and 36.  Also, Whitcomb, Carl E. and J.N. Joiner, 1971, Effects of Day length, Light Intensity and Fertilizer Rates on Growth of Six species of Northern Conifers.  Proceedings Southern Nursery Research Conference, volume 17, page 18 

First to study the incorporation of slow release fertilizers in the rooting medium for cuttings stuck in small individual containers (1970-71, with student Mark Bisher, later in more detail with graduate students Jim Ward and Mike Carney). 

[Ward, James, D. and Carl E. Whitcomb. 1979.  Nutrition of Japanese Holly during Propagation and Production.  Journal of the American Society for Horticultural Science, volume 104, pages 523-526.  Also, Carney, Michael and Carl E. Whitcomb, 1983, Effects of 2 Slow-Release Fertilizers on the Propagation and Subsequent Growth of 3 Woody Plants.  Journal of Environmental Horticulture, volume 1, pages 55-58] 

First to narrow the water solubility of preemergent herbicides suitable for use on container nursery stock to less than one part per million (1969-1974, with students Joel Butler, Jon Rackley, Paul Klinger, Ann Moles and Philip Perryman). 

Klinger, Paul, and Carl E. Whitcomb, 1971, Movement of Herbicides in Containers.  Proceedings of Southern Nursery Research Report, volume 15, pages 5-6.  Also, Whitcomb, Carl E., and Jon Rackley.  1974 Effects of Multiple Applications of Treflan on Weed Control and Growth Response of Four Woody Ornamentals in Containers.  Nursery Research Journal, volume 1, pages 1-9.  Also.  Whitcomb, Carl E. and Joel F. Butler.  1975.  Performance of Trifluralin, Nitralin and Oryzalin in Nursery Containers.  Journal of the American Society for Horticultural Science, volume 100, pages 225-229.  Also.  Whitcomb, Carl E. and Philip E. Perryman.  1975.  Effects of Irrigation on the Movement of Treflan and Lasso in Containers.  Nursery Research Journal, volume 2, pages 1-10.  Also.  Moles, Ann and Carl E. Whitcomb.  1978.  Movement of Ronstar in Containers as Influenced by the Growth Media.  Nursery Research Journal, volume 5, pages 1-8 

First to use ground pine bark as a major component in a container growth medium (1970, with student David Stoner).  

Whitcomb, Carl E., 1970, Nursery Problems: Solutions through Research.  The Florida Nurseryman, volume 16, pages 6-. Also, Whitcomb, Carl E. 1971. Effects of Container Sidewall Porosity, Growth Media and Presence or Absence of Micronutrient Fertilizer on Root and Top growth of Carissa grandiflora, var. Boxwood Beauty.  Univ. of Florida, Institute of Food and Agricultural Sciences, Research Report. Pages 23-25. Also, Whitcomb, Carl E. 1972.  Effects of Watering Frequency, Growth Media and Nutritional Conditions of Stock Plants on Growth and Quality of Carissa grandiflora var. Boxwood Beauty.  Univ. of Florida, IFAS, Research Report. Pages 30-31. 

Created discs of plastic and various fabrics to exclude light from the surface of container growth media in order to control weeds (1970) 

Whitcomb, Carl E., 1970, Nursery Problems: Solutions Through Research.  The Florida Nurseryman, volume 16, pages 6-7 

Coated or impregnated mulches, fabrics or other materials with preemergent herbicides to improve longevity of weed control in container nursery stock (1970). [ 

Whitcomb, Carl E., 1970, Nursery Problems: Solutions through Research.  The Florida Nurseryman, volume 16, pages 6-7 

Identified the perched water table in containers and restriction of downward flow as being caused by the container bottom (1970).  Used a simple sponge with three different dimensions to demonstrate that drainage is a function of porosity of the medium and depth. 

Whitcomb, Carl E., 1972, Plants, Pots and Drainage.  Horticulture Horizons, volume 4, pages 12-13.  Also ,Whitcomb, Carl E., 1984, text, Plant Production in Containers, 633 pages, published by Lacebark Inc. Stillwater, Ok. 

First to determine that, contrary to the ‘accepted fact’ at the time, soil amendments in the planting hole are not only of no benefit but also often restrict rate of plant establishment (1969-1974,with graduate students Robert Burns in Gainesville, Florida and pure sand soils and Joe Schulte in Oklahoma in productive sandy clay loam field soil and subsoil clay). 

Schulte, Joseph R. and Carl E. Whitcomb.  1975.  Effects of Soil Amendments and Fertilizer Levels on the Establishment of Silver Maple.  Journal of Arboriculture, volume 1, pages 192-195 

First to measure that Bermudagrass severely restricts establishment and growth of woody plants, while St.Augustine grass has a modest stimulating effect (1970-1971, with student Stanley Dean). 

Whitcomb, Carl E.  1981.  Response of Woody Landscape Plants to Bermudagrass Competition and Fertility.  Journal of Arboriculture, volume 7, pages 191-194 

First to study growing plants pot-in-pot in the field (1973, with student Charles Hogan).  However, due to the limited drainage of both study sites, all plants died during each of two studies and the technique was abandoned. 

Hogan, Charles R. and Carl E. Whitcomb, 1974, Producing Container Nursery Stock in the Field.  Okla. Ag. Exp. Station Research Report P-704, pages 43-44 

Studied root pruning via copper toxicity using rigid thin walled copper pipe with a variety of paints and coatings to reduce copper uptake.  Following these studies, copper hydroxide was mixed with paint to coat conventional containers for root pruning via copper toxicity (1973-75).  After discussions with Dr. Tok Furuta at UC Riverside who had also been studying this technique, the conclusion was reached that this was NOT a desirable way to modify root systems. The studies were abandoned and findings remained in the file drawer. 

First to show that with certain species of shrubs or ground covers, sticking multiple cuttings in the same container can accelerate plant quality and reduce production time (with student Roger Bean). 

Bean, Roger R. and Carl E. Whitcomb, 1973, Effects of Multiple Cuttings per Container and Fertilizer Levels on Visual Appearance, Production Time and Landscape Performance of Juniperus procumbens and Ilex cornuta Burford.  Okla. Ag. Exp. Station Research Report P-691, pages 9-10.  Also, Whitcomb, Carl E. and Roger Bean, 1975, Multiple Cuttings per Container and Visual Appearance and Landscape Performance.  Okla. Ag. Exp. Station Research Report P-724, pages 33-36 

First to show that, contrary to ‘accepted fact’ at the time, extensive top pruning when planting trees harvested bare root or balled-in-burlap IS detrimental to establishment and development of sound branching patterns (1975-1980). 

Shoup, Steve, Rick Reavis and Carl Whitcomb, 1981, Effects of Pruning and fertilizers on Establishment of Bareroot Deciduous Trees, Journal of Arboriculture, volume 7, pages 155-157 

First to show that, contrary to the ‘accepted fact’ at the time, fertilizing newly planted trees, shrubs and annuals IS NOT detrimental but is profoundly beneficial when the nutrient elements applied are deficient (1975-1980). 

Shoup, Steve, Rick Reavis and Carl Whitcomb, 1981, Effects of Pruning and Fertilizers on Establishment of Bareroot Deciduous Trees, Journal of Arboriculture, volume 7, pages 155-157 

Developed testing procedures for giving students immediate, positive feedback during examinations while teaching plant identification (1970-1975).  The techniques used were a refinement of procedures used by Dr. Ray Keen at Kansas State University. 

Developed testing procedures for giving students immediate, positive feedback following essay exams (1976-1978).  To the best of my knowledge this had never been done before.  Instead of a student waiting days or weeks to know the results of an exam, they received a copy of the key as soon as they finished the exam.  It soon became clear that every student read the key in detail; therefore additional information was presented in the key above and beyond what the student was expected to have in their answer.  This made the exam not only an evaluation procedure, but a learning procedure as well, plus no class time was needed to ‘go over the exam’. 

Whitcomb, Carl E., 1984, Immediate Feedback Makes Exams A Positive Learning Experience, HortScience, volume 19, page 905 

Invented and patented a self contained solar heated greenhouse that stored heat in the floor and the roof of the structure was used as the solar collector. 

USA Patent #4,173,212.   Whitcomb, Carl E. 1977, A Solar Greenhouse for Propagation, Proc. International Plant Propagators Society Volume 27, pages 394-398. 

First to show that tree seedlings in air-root-pruning bottomless milk carton containers with incorporated slow release fertilizers were larger in one growing season than bare root, bed grown seedlings three years old (1976-1979, with graduate student Robert Hathaway). 

Hathaway, Robert D. and Carl E. Whitcomb, 1984, Nutrition and Performance of Container Grown Japanese Black Pine Seedlings.  Journal of Environmental Horticulture, volume 2, pages 9-1 

First to create a container design that trapped root tips which in turn stimulated root branching.  USA Patent #4,497,132. (1983, with student Jerry Williams). 

Whitcomb, Carl E. and Jerry D. Williams, 1985, Stair step Container for Improved Root Growth.  HortScience, volume 20, pages 66-67 

First to create containers with various openings in the sidewalls for air-root-pruning.  USA Patent#4,442,628 and 4,510,712. (1977-1979, with students Robert Birchell and Sancho Dickinson). 

Whitcomb, Carl E. 1981, A Vertical Air-Root-Pruning Container.  Proceedings International Plant Propagators Soc. Volume 31, pages 591-597 

Wrote the first comprehensive text for teaching plant identification of the trees, shrubs, vines and ground covers, east of the Rocky Mountains.  Know It and Grow It: a guide to the identification and use of landscape plants. 

Published 1975, [yes, it was published before Dirr], currently in it’s 3rd edition with over 800 pages and 2000 photos 

Coated fertilizer granules with preemergent herbicides to accomplish two tasks in one. (1975) 

Reavis, Rick and Carl E. Whitcomb. 1978. A Comparison of Treflan, Ronstar, Goal, and Destun for weed control in a field Nursery. Okla. Ag. Exp. Sta. Research Report P-777, Pages 21-23. Also, Carl E. 

Whitcomb and Rick Reavis, 1981.  Pre-emergent herbicide combinations for Field Nursery Stock.  Okla. Ag. Exp. Sta. Research Report P-818, Pages 4-6. 

First to develop long term slow release fertilizers lasting two years or more in containers and field. (1971-1977, with chemist Joe Keely, Swift and Co.) 

Whitcomb, Carl E.  1974.  Development of Long-Term, Low-Salt, Slow-Release Fertilizers for Field and Container Production and Landscape Use.  Okla. Ag. Exp. Sta. Research Report P-704, Pages 18-22. 

First to show that plants stressed from lack of light or leaf removal restricted root growth long before symptoms could be detected in above ground parts. (1976, with student Lisa Euchner). 

Whitcomb, Carl E. and L.K. Euchner, 1979, Effects of Shade Levels on Growth of Container Nursery Stock.  Nursery Research Journal, volume 6, pages 1-11 

First to study the interrelationships of the six micronutrients in container production.  Patented the formula for Micromax micronutrient fertilizer.  USA Patent#4,328,025.  Introduced and manufactured by Sierra Chemical Co. Milpitas, CA. and sold worldwide.  Later licensed to Grace-Sierra and presently the Scott’s Co. ((1979, with professor of statistics Dr. William Warde and graduate student Allan Storjohann) 

Whitcomb, Carl E., Allan Storjohann and William D. Warde, 1981, Micromax-Micronutrients for Improved Plant Growth.  Proceedings International Plant Propagators Soc.  Volume 30, pages 462-467.  Also, Whitcomb, Carl E. 1981, Effects of Micronutrients Nutrition during Propagation on Container Plant Production.  Proceedings International Plant Propagators Soc. Volume 30, pages 468-473 

First to show that the chemistry of the water used to mist cuttings influenced rooting.  (1977). 

Whitcomb, Carl E. 1977, A solar Greenhouse for Propagation.  Proceedings International Plant Propagators Soc.  Volume 27, pages 394-397.  Also, Whitcomb, Carl E. 1983, Rooting Cuttings under A Wet Tent.  Proceedings International Plant Propagators Soc.  volume 32, pages 450-454 

Developed and patented a practical solar heated greenhouse. USA Patent#4,173,212. (1977). 

Whitcomb, Carl E. 1978, A Self-Contained Solar Heated Greenhouse.  HortScience, volume 13, pages 30-32 

First to demonstrate that some trees and ground covers are compatible while others are restrictive of the growth of the other plant (with student Steve Shoup). 

Shoup, Steve and Carl E. Whitcomb, 1981, Interactions between Trees and Ground Covers.  Journal of Arboriculture, volume 7, pages 186-187 

Developed and patented crapemyrtle cultivar ‘Centennial Spirit’.  USA Patent#6,265.  (1983). 

Whitcomb, Carl E., Charlie Gray and Billy Cavanaugh, 1985, ‘Centennial Spirit’ Crapemyrtle.  HortScience, volume 20, pages 1144-1145 

Developed and patented crapemyrtle cultivar ‘Prairie Lace’. USA Patent#6,365.  (1984). 

Whitcomb, Carl E., Charlie Gray and Billy Cavanaugh, 1984, ‘Prairie Lace’ Crapemyrtle.  HortScience, volume 19, pages 737-738 

Developed lacebark elm cultivar ‘Prairie Shade’.  (1982, with student Gary Hickman) 

Hickman, Gary, Bonnie Appleton and Carl E. Whitcomb, 1982, Vegetative Propagation and Evaluation of Five Ulmus parvifolia, Lacebark Elm Selections.  Okla. Ag. Exp. Station Research Report P-829, pages 16-18 

First to show that, contrary to the ‘accepted fact’ at the time, that pruning of roots of bare root plants when planting into containers has no detrimental effect on the plant.  New roots originate at the point where the roots were cut.  (1983-84, with former student Don Richards). 

Whitcomb, Carl E. 1986, Influence of root Pruning and Fertilizer on Survival and Quality of Two Bare-Root Rose Cultivars.  Journal Environmental Horticulture, volume 4, pages 29-32.  Also, Carl E. Whitcomb, Charlie Gray and Billy Cavanaugh. 1985.  Performance of Oregon-Grown bare root whips with various treatments during lining out in the field.  Okla. Ag. Exp. Sta. Research Report P-872, Pages 45-48. 

First to develop an insulated pallet for producing and overwintering plants (1982-83). 

Whitcomb, Carl E. and J.D. Williams, 1984, An Insulated Pallet to Reduce Labor Cost and Temperature Stress in Container Plant Production.  Proceedings International Plant Propagators Soc. volume 34, pages 500-505 

First to demonstrate that pine tip moth could be controlled by systemic insecticides after invading bud tissues (with student Jim King). 

King, James E., Richard Price, Kenneth Pinkston and Carl E. Whitcomb, 1983, Control of Nantucket Pine Tip Moth, Rhyacionia frustrana, on Nursery-Grown Pine with Granular Systemic Insecticides.  Journal Environmental Horticulture, volume 1, pages 40-42 

First to show that, contrary to the ‘accepted fact’ at the time, that movement of seeds in the few days prior to germination was responsible for many kinked and deformed root systems, especially on oaks, pecans and other nut trees.  (1983, with graduate student Bonnie Appleton). 

Appleton, B.L., Carl E. Whitcomb and S.W. Akers, 1986, Effects of Seed Handling, Pre-Germination and Planting Position on Tree Seedling Root and Stem Development.  Journal Environmental Horticulture, volume 4, pages 29-32 

First to demonstrate that producing trees in the field in fabric containers then finishing in above ground containers was a viable and cost effective technique (1980-1983). 

Whitcomb, Carl E., 1985, Innovations and the Nursery Industry.  Journal Environmental Horticulture, volume 3, pages 33-38 

First to demonstrate that cutting back the long roots of trees harvested bare root has no detrimental effect when planting into containers or the field.  (In cooperation with former student Don Richards and Carrolton Plants Nursery).  (1980-1982 

Richards, Don and Carl E. Whitcomb, 1980, Effects of Nutrition During Propagation and Date; of Planting-Out on Quality of Nursery Stock.  Okla. Ag. Exp. Station Research Report P-803, pages 37-41.  Also,  Whitcomb, Carl E., Don Richards, Charlie Gray and Billy Cavanaugh, 1985, Performance of Oregon-Grown Bare Root Whips with Various Treatments During Lining Out in the Field.  Okla. Ag. Exp. Station Research Report, P-872, pages 45-47 

First to demonstrate, and contrary to the popular view of that day, that simply digging a larger planting hole provided a great benefit to the establishment of newly planted trees (with students Ken Preaus, Robert Bridel and Bonnie Appleton). 

Preaus, Kenneth and Carl E. Whitcomb, 1980, Transplanting Landscape Trees.  Journal of Arboriculture volume 6, pages 221-223.  Also, Bridel, Robert, Carl E. Whitcomb and Bonnie Appleton, 1983, Planting Techniques for Tree Spade Doug Trees.  Journal of Arboriculture, volume 9, pages 282-284 

First to demonstrate that the timeliness of transplant date of plants grown in containers is critical for continued accelerated growth (with graduate student, Bonnie Appleton). 

Appleton, B.L. and Carl E. Whitcomb, 1983, Effects of Container Size and Transplanting Date on the Growth of Tree Seedlings.  Journal Environmental Horticulture, volume 1, pages 89-93 

First to determine and contrary to popular belief, that a few preemergent herbicides can be used in greenhouses (with Dr. Paul Santelmann). 

Whitcomb, Carl E. and Paul Santelmann, 1983, Evaluation of Herbicides for use in Closed Structures.  Journal Environmental Horticulture, volume 1, pages 93-95 

First to identify striking differences among lacebark elm seedlings to root from cuttings and grow into acceptable trees. (1981, with student Gary Hickman) 

Whitcomb, Carl E., 1984, Propagating Trees from Cuttings.  Proc. Southern Nursery Research Conf.  volume 29, pages 200-201 

Wrote and published first comprehensive text, Plant Production in Containers.  (1984, 633 pages).  Revised Plant Production in Containers II (2003, 1,150 pages) 

First to determine that propagation container dimensions are critical for accelerated plant growth (with student Chris Threadgill). 

Threadgill, C.C., Carl E. Whitcomb and R. McNew, 1985, Effects of Propagation Container Dimensions and Media on Growth of Four Nursery Crops.  Journal Environmental Horticulture, volume 3, pages 126-131 

First to show that chemistry of the irrigation water must be considered when determining optimum calcium and magnesium levels in a container growth medium (1985, with student Don Brosh). 

Brosh, D.L., Carl E. Whitcomb, S.W. Akers and P.L. Claypool, 1987, Water Quality and Calcium plus Magnesium Fertilization Effects on Container-Grown Gardenia and Japanese Holly.  Journal Environmental Horticulture, volume 5, pages 49-52.  Also, Whitcomb, Carl E. 1988, Calcium Magnesium and Irrigation Water.  Proceedings International Plant Propagators Soc. volume 38, pages 425-429.   Also, Whitcomb, Carl E. 1992, Effects of Water Quality and Water Management on the Growth of Container Nursery Stock.  Proceedings International Plant Propagators Soc.  volume 41, pages 672-677 

Wrote and published first comprehensive text, Production of Landscape Plants (in the field) (1987), Revised 2001, Production of Landscape Plants II, 740 pages. 

Wrote and published first comprehensive text, Establishment and Maintenance of Landscape Plants (1987), Establishment and Maintenance of Landscape Plants II (2006). 

Designed and patented the RootMaker® container for air-root-pruning on the sides as well as the bottom. USA Patent#4,753,037. (1987) 

Whitcomb, Carl E. 1989, Roots for the Future.  Proceedings International Plant Propagators Soc. volume 39, pages 170-174 

Designed and patented the RootBuilder® expandable container for air-root-pruning on the sides of large containers.  USA Patent#4,939,865 and 4,716,680. (1987-1989, with Harold Stephens) 

Developed and patented the RootCeller®, a plant containment system above ground that insulates and protects roots of container nursery stock from temperature extremes and prevents blow over.  USA Patent#4,793,097. (1988) 

Developed and patented a water mat for sub irrigating plants growing in containers. USA Patent#4,729,189. (1988) 

Developed and patented the WaterTrof®, a sub irrigation device for watering plants growing in containers.  USA Patent#5,036,619. (1989) 

Designed and developed the Knit Fabric In-Ground Container for constriction (girdling) of plant roots while growing nursery stock in the field. (1990) 

First to demonstrate that trees grown in the field in Knit Fabric In-Ground Containers could be easily harvested using a nylon strap around the trunk while they are dormant. (1996) 

Whitcomb, Carl, 1998, Tree Harvest, As Easy as 1,2,3.  Nursery Manager, volume --, pages ---- 

First to demonstrate that Christmas trees grown in Knit Fabric In-Ground Containers could be harvested with a strap and a simple lever and those trees grown this way not only remain fresh and attractive when used indoors for several weeks, but also survive when planted into the landscape. 

Whitcomb, Carl E., 2000, Growing Christmas Trees in Knit Bags or Selling Truly Living Christmas Trees vs. Trees That Were Once Alive.  Proceedings Oklahoma and Arkansas Horticultural Industries, volume 19, pages 243-245 

Developed and patented the RootMaker® II container design for effective air-root-pruning with less production cost.  USA Patent#5,557,886.  (1999) 

First to demonstrate that nursery stock in the field, when fully dormant, could be sprayed over the top with a combination of Roundup and preemergent herbicide.  This controls winter annuals as well as spring and summer weeds.  (1992) 

First to determine that plants growing in containers could be accelerated in growth and branching even though no deficiencies could be measured or observed. 

Whitcomb, Carl E. 1992, Is Green Good Enough.  Proceedings International Plant Propagators Society Proc.  Volume 42, pages 337-339 

First to demonstrate that soil could be used in container growth medium as long as the soil column was maintained separate from the soilless growth medium.  This technique has been used successfully in hanging baskets and patio plants to reduce watering frequency and improve plant performance.  (1990) 

Whitcomb, Carl, 1999, Producing Patio Plants That Last.  Nursery Manager, volume --, pages 87 

First to demonstrate that by drilling holes around chlorotic trees or shrubs and filling the holes with a combination of sulfur, micronutrients and a slow release fertilizer, that chlorosis could be solved for many years, even in alkaline clay soils.  (1986-1989). 

Developed a system of high light intensity and high humidity for propagating plants from cuttings.  Redbud and sugar maple cultivars were rooted, whereas all previous attempts failed (1997). 

Whitcomb, Carl E.  1997, High Light with Moderated Temperatures Aids the Rooting of Softwood Cuttings.  Proceedings International Plant Propagators Soc., volume 47, pages 403-406 

Developed a greenhouse ventilation system using air-inflated tubing at openings in the sides as well as at roof vents for superior temperature control, without drafts.  (1994) 

Developed and patented crapemyrtle cultivar ‘Whit I”, Raspberry Sundae® with fragrant flowers and columnar growth. USA Plant Patent#10297.  (1997) 

Developed and patented crapemyrtle cultivar ‘Whit II”, Dynamite® a tree form with true red flowers.  USA Plant Patent#10296. (1997) 

Developed and patented crapemyrtle cultivar ‘Whit III’, Pink Velour®, with wine foliage and shrill pink flowers.  USA Plant Patent#10319. (1997) 

Developed and patented crapemyrtle cultivar ‘Whit IV’, Red Rocket®, a tree form with huge red flower clusters.  USA Plant Patent#11342. (1998) 

Developed and patented crapemyrtle cultivar ‘Whit V’, Tightwad Red®, a sterile, true dwarf with red flowers.  USA Plant Patent#11312. (1998) 

Developed and patented crapemyrtle cultivar ‘Whit VI’, Burgundy Cotton®, a tree form with red new foliage and white flowers.  USA Plant Patent #14,438 P2 (2003). 

Developed crapemyrtle cultivar ‘Whit VII’, Siren Red®, an intermediate size plant with dark green foliage and oxblood red flowers.  USA Plant Patent # 14,975 (2003) 

Developed a compact dwarf hardy hibiscus plant, Hibiscus moscheutos, Cranberry Punch, with small oxblood red flowers.  USA Plant Patent #15,091. (2003) 

Developed and patented river birch, Betula nigra, City Slicker®.  USA Plant Patent #16,573. (2006) 

Developed and patented lacebark elm, Ulmus parvifolia, Easy Street®.  USA Plant Patent #16,883. (2006) 

Developed the first practical way to utilize the insulation and moisture holding capacity of the cavity of a cinder block for the production of plants and even tall plants do not blow over.  (1997)  

Whitcomb, Carl E.  1999, Growing In A Cinder Block.  Proceedings International Plant Propagators Soc. volume 49, pages 527-531 

Assembled and published a comprehensive report detailing plant and environmental effects of sulfonylurea and other ALS inhibiting herbicides. 

Whitcomb, Carl E., 1999, An Introduction to ALS-Inhibiting Herbicides.  Toxicology and Industrial Health, volume 15, pages231-239 

Developed crapemyrtle cultivar ‘Whit VIII”, Rhapsody in Pink, a large plant that produces no seeds and soft pink flowers rebloom for the summer on the same panicle.  US Plant Patent #16,616 (2006) 

Developed and patented a practical and effective container design.  This is the latest RootBuilder® patent with all outward projecting cones that slope slightly downward.  Method and Container for Growing Transplantable Plants.  2009.  US Patent #7,481,025. 

Professional Organizations:
International Plant Propagator's Society
Weed Science Society of America
American Society for Horticultural Sciences
Southern Nurserymen's Association
American Society of Agronomy
International Society of Arboriculture (life member)
Florida State Horticulture Society
Florida Nursery and Grower's Association
Oklahoma State Nurserymen's Association
Oklahoma State Horticulture Society (life member)
 

68.Whitcomb Carl E. 1992. Is Green Good Enough? Proc. Inter. Plant Prop. Soc. 42: in press.
67.Whitcomb, Carl E. 1991. Effects of water quality and water management on the growth of container nursery stock. Proc. Inter. Plant Prop. Soc. 41: in press.
66.Whitcomb, Carl E. 1990. Recycling irrigation water. Proc. Inter. Plant Prop. Soc. 40: 444-448.
65.Whitcomb, Carl E. 1989. Roots for the future. Proc. Inter. Plant Prop. Soc. 39: 170-174.
64.Whitcomb, Carl E. 1988. Calcium, magnesium, and irrigation water. Proc. Inter.. Plant Prop. Soc. 38: 425-429.
63.Brosh, D.L., C.E. Whitcomb, S.W. Akers, and P.L. Claypool. 1987. Water Quality and Calcium Plus Magnesium Fertilization Effects on Container-Grown Gardenia and Japanese Holly. Jour. Environ. Hort. 5(2): 49-52.
62.Whitcomb C.E. 1987. A New Concept in Greenhouse Design. Proc. Inter.. Plant Prop. Soc. 37: 489-494.
61.Whitcomb, C.E. 1986. Marketing Nursery Crops. Proc. Inter.. Plant Prop. Soc. 36: 374-377.
60.Whitcomb, C.E. 1986. Influence of Root Pruning and Fertilizer on Survival and Quality of Two Bare-Root Rose Cultivars. Jour. Environ. Hort. 4(1): 29-32.
59.Appleton, B.L., C.E. Whitcomb, and S.W. Akers. 1986. Effects of Seed Handling, Pre-germination and Planting Positions on Tree Seedling Root and Stem Development. Jour. Environ. Hort. 4(3): 69-72.
58.Kenna, S.W. and C.E. Whitcomb. 1985. Hardwood chips as an Alternative Medium for Container Plant Production. HortScience 20(5): 867-869.
57.Threadgill, C.C., C.E. Whitcomb, and R. McNew. 1985. Effects of Propagation Container Dimensions and Media on the Growth of Four Nursery Crops. Jour. Environ. Hort. 3(3): 126-131.
56.Whitcomb, C.E. and Appleton, B.L. 1985. Effects of Pine Bark Age, Starter Nitrogen, and Activated Charcoal on Growth of Plants in Containers. Jour. Environ. Hort. 3(2): 69-71.
55.Whitcomb, C.E. 1985. Innovations and the Nursery Industry. Jour. Environ. Hort. 3(1): 33-38.
54.Whitcomb, C.E. 1985. Water Quality and Plant Production in containers. Proc. Inter. Plant Prop. Soc. 35: 672-677.Whitcomb C.E. 1985. Plant modeling-Practical Application. Proc. Inter. Plant Prop. Soc. 35: 776-779.
53.Whitcomb C.E. 1985. Plant modeling-Practical Application. Proc. Inter. Plant Prop. Soc. 35: 776-779.
52.Whitcomb, C.E. 1985. Centennial Spirit Crapemyrtle. HortScience 20(6): 1144-1145.
51.Whitcomb, C.E. and J.D. Williams 1985. Stairstep Container for Improved Root Growth. HortScience 20(1): 66-67.
50.Whitcomb, C.E. and J.D. Williams. 1984. An Insulated Pallet to Reduce Labor cost and Temperature Stress in Container Plant Production. Proc. Inter. Plant Prop. Soc. 34: 500-505.
49.Whitcomb, C.E. 1984. Improving Uniformity in Container Nursery Stock. Proc. Inter. Plant Prop. Soc. 34: 456-471.Whitcomb, C.E. 1984. Immediate Feedback Makes Exams a Positive Learning Experience. HortScience 19: 905.
48.Shoup, Steven C. and Carl E. Whitcomb. 1984. Effects of Activated Charcoal on Hyuar X (bromacil) in the Landscape. American Nurseryman 160: 41-42.
47.Whitcomb, Carl e., Charlie Gray, and Billy Cavanaugh. 1984. 'Prairie lace' Crapemyrtle. HortScience 19: 737-738.
46.Whitcomb, Carl E., Charlie Gray, and Billy Cavanaugh. 1984. Evaluation of Herbicides for Use in Closed Structures. Jour. of Environmental Horticulture 1: 93-95.
45.Hathaway, Robert D. and Carl E. Whitcomb. 1984. Nutrition and Performance of Container Grown Japanese Black Pine Seedlings. Jour. of Environmental Horticulture 2: 9-12.
44.Whitcomb, Carl E. 1984. Reducing Stress and Accelerating Growth of Landscape Plants. Jour. of Arboriculture 10: 5-7.
43.Appleton, B.L. and Carl E. Whitcomb. 1983. Effects of Container size and Transplanting Date on the Growth of Tree Seedlings. Jour. Environmental Horticulture 1: 89-93.
42.Bridel, Robert, Carl Whitcomb and B.L. Appleton. 1983. Planting Techniques for Tree Spade Dug Trees. Jour. of Arboriculture. 9: 282-284.
41.Whitcomb, Carl E. and Thomas E. Pinney. 1983. Effects of Digging, Storage and Planting on Survival of Field Grown Bare-Root Mugo Pine in Containers. Jour. Environ. Hort. 1(2): 36-38.
40.Carney, Michael and Carl E. Whitcomb. 1983. Effects of 2 Slow-Release Fertilizers on the Propagation and Subsequent Growth of 3 Woody Plants. Jour. Environ. Hort. 1(3): 55-58.
39.King, James E. Richard G. Price, Kenneth n. Pinkston, and Carl E. Whitcomb 1983. Control of the Nantucket Pine Tip moth, Rhyacionia frustrana (Comstock), on Nursery-Grown Pine with Granular systemic Insecticides. Jour. Environ. Hort. 1 (2): 40-42.
38.Whitcomb, Carl E. 1983. Rooting Cuttings Under a Wet Tent. Proc. Inter. Plant Prop. Soc. 32: 450-454.
37.Whitcomb, Carl E. 1983. Why large Trees are Difficult to Transplant. Jour. of Arboriculture. 9: 57-59.
36.Dickinson, Sancho and Carl E. Whitcomb. 1982. Root Development of Transplanted Seedlings in Bottomless Milk Cartons. Jour. of Arboriculture. 8: 223-324.
35.Whitcomb, Carl E. 1981. A Vertical-air-root-pruning Container. Proc. Inter. Plant. Prop. Soc. 31: 591-597.
34.Whitcomb, Carl E. 1981. Response of Woody Landscape Plants to Bermudagrass Competition and Fertility. Jour. of Arboriculture 7: 191-194.
33.Shoup, Steve and Carl E. Whitcomb. 1981. Interactions Between Trees and Ground Covers. Jour. of Arboriculture. 7: 186-187.
32.Whitcomb, Carl E., Allan Storjahann, and William D. Warde. 1981. Micromax-Micronutrients for Improved Plant Growth. Proc. Inter. Plant Prop. Soc. 30: 462-467.
31.Whitcomb, Carl E., 1981. Effect of Micronutrient Nutrient Nutrition During Propagation on Container Plant Production. Proc. Inter. Plant Prop. Soc. 30: 468-473.
30.Whitcomb, Carl E., Ralph Reiger, and Mike Hanks. 1981. Growing Trees in Wire Baskets. Jour. of Arboriculture. 7: 158-160.
29.Shoup, Steve, Rick Reavis, and Carl E. Whitcomb. 1981. Effects of Pruning and Fertilizers on Establishment of Bareroot Deciduous Trees. Jour. of Arboriculture. 7: 155-157.
28.Preaus, Kenneth, and Carl E. Whitcomb. 1980. Transplanting landscape Trees. Jour. of Arboriculture. 6: 221-223.
27.Whitcomb, Carl E., and Carol Boyer. 1980. Activity of Ronstar (Oxidiazon) in Containers as Affected by the Growing Media. Nursery Research Journal. 65: 14-18.
26.Whitcomb, Carl E., and L.K. Euchner. 1979. Effects of Shade Levels on Growth of containers Nursery Stock. Nursery Research Journal. 6: 1-11.
25.Whitcomb, Carl E. 1979. Factors Affecting the Establishment of Urban Trees. Jour. of Arboriculture. 5: 217-220.
24.Ward, James D., and Carl E. Whitcomb. 1979. Nutrition of Japanese Holly during Propagation and Production. Jour. American Soc. Hort. Sci. 104: 523-526.
23.Ward, James D., and Carl E. Whitcomb. 1979. Effects of Osmocote on Ilex crenata 'Hetzi" during Propagation and Production. Nursery Research Journal. 6:12-23.
22.Moles, Ann, and Carl E. Whitcomb. 1978. Movement of Ronstar in Containers as Influenced by the Growing Media. Nursery Research Journal. 5: 1-8.
21.Whitcomb, Carl E. 1977. A Solar Greenhouse for Propagation. Proc. Inter. Plant Prop. Soc. 27: 394-397.
20.Whitcomb, Carl E. 1978. A Self-contained Solar Heated Greenhouse. Hort Science. 13: 30-32.
19.Whitcomb, Carl E., and Toby W. Goodale. 1977. Effects of Tolban, Ronstar and Djevrinol and Plant Growth and Weed Control in Containers. Nursery Research Journal. 4: 20-27.
18.Dickinson, Sancho, and Carl E. Whitcomb. 1977. The Effects of Spring vs. Fall Planting on Establishment of Landscape Plants. Nursery Research Journal. 4: 9-19.
17.Hathaway, Robert D. and Carl E. Whitcomb. 1977. Propagation of Quercus Seedlings in Bottomless Containers with Osmocote. Jour. of Arboriculture. 3: 208-212.
16.Whitcomb, Carl E. 1977. Effects of Herbicides on Growth of Container Nursery Stock. Nursery Res. Jour. 3: 1-12.
15.Schulte, Joseph R. and Carl e. Whitcomb. 1975. Effects of Soil Amendments and fertilizer Levels on the Establishment of Silver Maple. Jour. of Arboriculture. 1: 192-195.
14.Whitcomb, Carl e. John G. Rackley, and Roger Bean. 195. The Effects of Multiple Liners Per Container on Growth and Visual Grade of Woody Ornamental Plants. Nursery Res. Jour. 3: 1-13.
13.Davis, Randy E. and Carl E. Whitcomb. 1975. Effects of Propagation Container Size on Development of High Quality Tree Seedling. Proc. Inter. Plant. Prop. Soc. 25: 448-453.
12.Whitcomb, Carl E. and Philip E. Perryman. 1975. Effects of Irrigation on the Movement of Treflan and Lasso in Containers. Nursery Research Journal. 2: 1-9.
11.Whitcomb Carl E. and Joel F. Butler. 1975. Performance of Trifluralin, Nitralin, and Osyzalin in Nursery Containers. Jour. Of the Amer. Soc. For Hort. Sci. 100: 225-229.
10.Whitcomb, Carl E. Gordon C. Hall, Lonnie T. Davis, Jr. and Gerald S. Southwell. 1975. The Potential of Antitransplants in Plant Production. Proc. Inter. Plant Prop. Soc. 24: 342-348.
9.Whitcomb, Carl E., and Jon G. Rackley. 1974. Effects of Multiple Application of Treflan on Weed Controland Growth Response of Four Woody Ornamentals in Containers. Nursery Research Journal. 1: 1-9.
8.Whitcomb, Carl E. and Jacob Stowers. 1973. Sound Abatement with Hedges. HortScience. 8: 128-129.
7.Whitcomb, Carl E. 1973. Competition Between Established Tree Roots and Newly Seeded Kentucky Bluegrass. Agronomy Journal. 65: 126-129.
6.Butler, Joel F. and Carl E. Whitcomb. 1972. Effects of Method of Application of Trefluralin in Containers. HortScience 7: 341-343.
5.Whitcomb, Carl E. 1972. Influence on Tree Root Competition on Growth Response of four Cool Season Turfgrasses. Agronomy Journal. 64: 355-359.
4.Dean, Stanley G., Carl E. Whitcomb, and C.A. Conover. 1970. Effects of Media and Container Type on Herbicidal Activity in Container Grown Woody Ornamentals. Proc. Fla. State Hort. Soc. 83: 502-507.
3.Whitcomb, Carl E., Eliot C. Roberts, and Roget Q Landers. 1969. A Connecting Pot Technique for Root Competition Investigations Between Woody Plants or Between Woody Herbaceous Plants. Ecology. 50: 326-329.
2.Whitcomb, Carl E. and Eliot C. Roberts. 1967. Effect of Surfactoants on Growth of Turgrasses. Proceedings of the American Soc. for Hort. Science 90: 420-426.
1.Whitcomb, Carl E. and Eliot C. Roberts. 1967. Effect of Surfactoants on Growth of Turgrasses. Proceedings of the American Soc. for Hort. Science 90: 420-426.

 

89.Whitcomb, Carl E. 1991. Understanding the Container system. Jour. of the American Bonsai Soc. 25(1): 12-13.
88.Whitcomb Carl E. 1991. Is your Nursery Wasting Water? Nursery Manager 7(11): 34-38.
87.Whitcomb, Carl E. 1991. Recycling Irrigation Water. Nursery digest 25(3): 17-19.
86.Whitcomb, C. E. 1987. Intercrops for Field Nursery Stock. Proc. Southern Nurs. Assoc. Res. Conf. 32: 159-161.
85.Whitcomb, C.E. 1987. Root Development and Plant Growth. Proc. Southern Nurs. Assoc. Res. Conf. 32: 131-133.
84.Whitcomb, C.E. 1985. Fabric Field Grow Containers Enhance Root Growth. Amer. Nurseryman 163(7): 49-52.
83.Whitcomb, C.E. 1985. A Propagation Technique for Difficult-to-Root Species. Proc. Southern Nurs. Assoc. Res. Conf. 30: 241-244.
82.Whitcomb, C.E., Charlie Gray, and Billy Cavanaugh. 1985. Methods of Transplanting Large Trees. Proc. Southern Nurs. Assoc. Res. Conf. 30: 166-117.
81.Whitcomb, C.E. 1985. Survival and Quality of Bare Root Roses in Containers. Proc. Southern Nurs. Assoc. Res. Conf. 30: 86.
80.Whitcomb, C.E. 1985. Tree Production Without Stress. Proc. Flowering Tree Conf.
79.Whitcomb, C.E., Charlie Gray, and Billy Cavanaugh. 1985. Capillary Water Beds for Container Nursery Stock in Oklahoma. Proc. Southern Nurs. Assoc. Res. Conf. 30: 55-57.
78.Whitcomb, C.E., 1984. Propagating Trees from Cuttings. Proc. Southern Nurs. Assoc. Res. Conf. 29: 200-201.
77.Appleton, B.L. and C.E. Whitcomb. 1984. Establishment of Container Grown Ornamentals. Proc. Southern Nurs. Assoc. Res. Conf. 29: 106-108.
76.Whitcomb, C.E. and B.L. Appleton. 1984. Effects of Water Quality on Plant Growth in Containers. Proc. Southern Nurs. Assoc. Res. Conf. 29: 42-43.
75.Whitcomb, C. E. and J. D. Williams. 1984. A Container to Stimulate Root Branching. Proc. Southern Nurs. Assoc. Res. Conf. 29: 34-35.
74.Henderson, Susan and Carl E. Whitcomb. 1984. Response of False Aralia, Micronutrients, and Osmocote. Nursery Digest 18(2): 51-52.
73.Bridel, Robert, Carl Whitcomb, and B. L. Appleton. 1984. Planting Techniques for Tree Spade Dug Trees. OK Turf 2(3): 2-4.
72.Whitcomb, Carl E. and Jerry D. Williams. 1984. A Container to Stimulate Root Branching. Proc. Nursery Research Conf. 29: 34-35.
71.Whitcomb, Carl E and B.L. Appleton. 1984. Establishment of Container Grown Ornamentals. Proc. Nursery Research Conf. 29: 106-108.
70.Appleton, B.L. and Carl E. Whitcomb 1984. Effects of Water Quality on Plant Growth in Containers. Proc. Nursery Research Conf. 29: 42-43.
69.Whitcomb, Carl E. 1984. Propagating Trees from Cuttings. Proc. Nursery Res. Conf. 29: 200-201.
68.Whitcomb, Carl E. 1984. The Wrinkles in the Life of a Root. Nursery Digest 17 (11): 30-31.
67.Reiger, Ralph and Carl E. Whitcomb. 1983. A Root Control System for Growing and Transplanting Trees. Nursery Digest 17(10): 66-69.
66.Reiger, Ralph and Carl E. Whitcomb. 1983. Growers Can Now Confine Roots to In-Field Containers. The American Nurseryman. 158: 31-34.
65.Whitcomb, Carl E. 1983. Does pH Really Have an Effect on Nutrition of Container-grown Plants?. The American Nurseryman. 158: 33-34.
64.Whitcomb, Carl E. 1983. Plant Response to Levels of Micromax. Nursery Digest. 17: 34-35.
63.Appleton, Bonnie L. and Carl E. Whitcomb. 1983. Effects of Propagation Container Size and Transplanting Date on the Growth of Tree Seedlings. Proceedings of the 1982 Southern Nursery Conference. Tech. Publ. R8-TP4.
62.Whitcomb, Carl E. 1982. The Effects of Ground Pine Bark on Micronutrient Applications. The American Nurseryman. 156: 43-44.
61.Whitcomb, Carl E. 1982. Plant Establishment Techniques. Proc. Ark. Hort. Soc. 103: 74-77.
60.Whitcomb, Carl E. 1982. New Plants for the Landscape. Proc. Ark. Hort. Soc. 103: 70-73.
59.Whitcomb, Carl E. 1983. Increasing Survival Rates of Large Trees after Transplanting. The American Nurseryman. 157(12): 79-80.
58.Whitcomb, Carl E. 1983. Evolution and the Container System. The American Nurseryman. 157: 119-122.
57.Whitcomb, Carl E. 1983. Containers VS. Poly Bags-Which are Better? The American Nurseryman. 157: 101-103.
56.Whitcomb, Carl E. and Steve Shoup. 1982. Interactions Between Trees and Ground covers in the Landscape. The Texas Nurseryman. 12: 28-29.
55.Whitcomb, Carl E. 1982. Rebuilding Nursery Soils. The American Nurseryman. 155: 81-83.
54.Huffine, Wayne, Lester W. Reed, and Carl E. Whitcomb. 1982. Selection, Establishment and Maintenance of Roadside Vegetation. Misc. Publ. 110 of the OK Agri. Exp. Sta. 66 pages.
53.Kind, Ed, Bonnie Appleton, Richard Price, Ken Pinkston, and Carl E. Whitcomb. 1982. Control of Nantucket Pine Tip Moth on Mugo Pine. Insecticide and Acaricide Tests. 7: 223.
52.Whitcomb, Carl E. and C. Boyer. 1981. Growing Media Composition Influences Herbicide Performance. The American Nurseryman. 153: 11, 122-124.
51.Whitcomb, Carl E. 1981. Growing Tree Seedlings in Containers. Bulletin #755 of the OK Agricultural Experiment Station, Stillwater, OK.
50.Dickinson, Sancho and Carl E. Whitcomb. 1981. Why Nurserymen Should Consider Fall Transplanting. The American Nurseryman. 153: 11, 64-67.
49.Preaus, Kenneth and Carl E. Whitcomb. 1981. How Does the Digging Method Affect Tree Transplanting Success: The American Nurseryman. 154: 9, 18-20.
48.Goodale, Toby W. and Carl E. Whitcomb. 1980. Producing Woody Ornamental Shrubs in Containers, Costs of Production and Projected Profits. Ornamentals South. 2(4): 20-25.
47.Goodale, Toby and Carl E. Whitcomb. 1980. Producing Woody Ornamental Shrubs in Containers, Influence of Fertility Level and Container Size. Ornamentals South. 2(3): 10-13.
46.Whitcomb, Carl E. 1980. Selecting a System for Irrigating Crops in Containers. The American Nurseryman. 152: 1,26,132,134.
45.Whitcomb, Carl E. 1980. How Shade and Fertilizers Affect Woody Plant Growth. The American Nurseryman. 151(11): 7, 56, 60, 62, 64.
44.Whitcomb, Carl E. 1979. Factor Affecting the Establishment of Urban Trees. Proc. Midwestern Chapter, Inter. Shade Tree Conf. 34: 55-59.
43.Knapp, Mike and Carl E. Whitcomb. 1979. Needs of Field-grown Mugo Pine Transplanted into Containers. The American Nurseryman. 149(11): 7, 48.
42.Whitcomb, Carl E. 1979. Propagating Woody Plants from Cuttings. Ornamentals South 1(3): 16-24.
41.Whitcomb, Carl E. 1979. Growing Plants in Poly Bags. The American Nurseryman. 149: 10, 97,98.
40.Whitcomb, Carl E. 1978. Micronutrient Fertilizers Used on Container-Grown Ilex crenata 'Hetzi'. The American Nurseryman. 147(14): 12, 51,52,56.
39.Whitcomb, Carl E. 1978. Using Ronstar Effectively. The American Nurseryman. 147(10): 12,40,42,45,46.
38.Whitcomb, Carl E. 1978. Roundup-Effective for controlling Perennial Weeds. The American Nurseryman. 147(9): 100-101.
37.Whitcomb, Carl E., John Gibson and Allan Storjohann. 1978. Effects of Osmocote in Rooting Media. The American Nurseryman. 147(7): 11,66,67,68.
36.Dickinson, Sancho and Carl E. Whitcomb. 1978. Establishing Landscape Plants-Fall Transplanting Vs. Spring Transplanting. The American Nurseryman. 146: 8,22,24,26,28 and 30.
35.Whitcomb, Carl E. and Paul W. Santelmann. 1978. Effects of Herbicides Used on a Greenhouse Floor on Growth of Plants on Raised Benches. The Florida Nurseryman. 23(1): 6, 89.
34.Whitcomb, Carl E. 1978. Propagating Woody Plants from Cuttings. OK Agri. Exp. Sta. Technical bulletin B-733. 20 pages. Oklahoma State University, Stillwater, OK.
33.Goodale, Toby, Robert D. Hathaway, James D. Ward, and Carl E. Whitcomb. 1977. Controlling Common Bermudagrass with Hand-applied Application of Roundup. The Florida Nurseryman. 22(4): 71.
32.Whitcomb, Carl E. 1977. A Self-contained Solar Heated Greenhouse. Research Report P-756. Agri. Exp. Sta., OK. State Univ., Stillwater, OK.
31.Whitcomb, Carl E. 1976. Effects of Pruning severity and Frequency and Fertilizer Levels on Growth and Quality of Juniperus chinensis 'Pfitzeriana' and 'Hetzi'. The Florida Nurseryman. 21(10): 24 & 69.
30.Remon, James and Carl E. Whitcomb. 1976. Effects of Sulfur on Reducing the pH of an Alkaline Soil. The Florida Nurseryman. 21(1): 31 & 70.
29.Hall, Gordon C. and Carl E. Whitcomb 1976. Antitranspirants: An Investment or an Unnecessary Expense? The American Nurseryman. 144(2): 14, 22.
28.Whitcomb, Carl E., Robert L Byrnes, Joseph r. Schulte and James D. Ward. 1976. What is a $5 Planting Hole? The American Nurseryman. 144(5): 1, 111,112, 114,115.
27.Hathaway, Robert D., J.D. Ward, Toby Goodale and Carl e. Whitcomb. 1976. Effects of roundup on Woody Landscape Plants. The Florida Nurseryman. 21(4): 53.
26.Glenn, Robert, Charles Hogan and Carl E. Whitcomb. 1976. Effects of Osmocote in the rooting Medium and Auxin Levels on rooting and Subsequent Growth of Cuttings. The Florida Nurseryman. 21(3): 30 & 40.
25.Whitcomb, Carl E., Jon Rackley and Roger Bean. 1976. Growing Nursery Stock from Multiple Liners. The American Nurseryman. 144(6): 13, 32, 34,36,38.
24.Whitcomb, Carl E. 1976. Spare the Water and Save the Plant. Horticulture Horizons. 54(1): 18-19.  
23.Whitcomb, Carl E. 1975. Plants, Pots, and Drainage. Horticulture Horizons 9(27): 12-13.  
22.Bisher, M.P. and Carl E. Whitcomb 1975. Response of Woody ornamental Liners to Fertilization, Propagation Pot Size and Holding Time. The Florida Nurseryman. 9(27): 9-10.
21.Whitcomb, Carl E. 1975. Colors for All Seasons. The Golf Superintendent. 43(9): 14-21.
20.Whitcomb, Carl E. 1974. Effects of Pot Size on Rooting of Juniper Cuttings. The American Nurseryman. 139: 15,73-75.
19.Murray, Donald P. and Carl E. Whitcomb. 1973. Maximizing Rooting of Bottlebrush Cuttings. The Florida Nurseryman. 18: 13,35.
18.Whitcomb, Carl E. 1973. Establishing Trees and Turfgrass Together. The Golf Superintendent. 41: 28-29.
17.Whitcomb, Carl E. 1972. When Trees compete with Turfgrass. The Golf Superintendent. 40: 30-32.
16.Whitcomb, Carl E. 1972. Growth of Carissa grandiflora 'Boxwood Beauty' in Varying Media, Containers and Micronutrient Levels. The Florida Nurseryman. 17: 12,13.
15.Jones, Harold C. and Carl E. Whitcomb. 1971. How You Prune may make a Difference. The Florida Nurseryman. 16: 12,13.
14.Whitcomb Carl E. 1971. Speeding Up Slow Growing Trees. The Golf Superintendent. 39: 20-22.
13.Whitcomb, Carl E. 1971. Nursery Problems: Solutions through Research. The Florida Nurseryman. 16: 6,7. Also, Nurserymen's' Digest, June 1971, 22-23.
12.Ayer, Michael T. and Carl E. Whitcomb. 1971. Australian Pine in Florida. The Florida Nurseryman. 16: 7,21.
11.Whitcomb, Carl E. and J. N. Joiner. 1971. Forms and Levels of Nitrogen: Ammonium vs. Nitrate. The Florida Nurseryman. 16: 7.
10.Whitcomb, Carl E. 1971. Black Plastic in the Container Nursery. Part II: Problems with soil and Air Temperatures. The American Nurseryman. 133: 12, 54-56.
9.Whitcomb, Carl E. 1971. Black Plastic in the container Nursery. Part I: The Drainage Problems. The American Nurseryman 133: 9.
8.Whitcomb, Carl E., and J.N. Joiner. 1970. Growth of Northern conifers in Florida. The Florida Nurseryman. 15: 7 & 36.
7.Whitcomb, Carl E. 1970. Response of four Container Grown Woody Ornamentals to Rates of Perk and Osmocote. The Florida Nurseryman. 15: 7, 36,37.
6.Whitcomb, Carl E. and Lonnie T. Davis, Jr. 1970. Antitranspirants-A Better Way to Root cuttings? The American Nurseryman. 132: 9, 100,101.
5.Whitcomb, Carl E. and Lonnie T Davis, Jr. 1970. Propagation of Leafy Cuttings Without Mist. The Florida Nurseryman. 15: 7, 36.
4.Whitcomb, Carl E. 1968. Grass and Tree Root Relationships. Proc. of the Florida Turfgrass Conference. 16: 16-20.
3.Whitcomb, Carl E. 1968. Root Competition Between Trees and Turf. Proc. Of the 39th Annual International Turfgrass conference. 39: 18-20.
2.Whitcomb, Carl E., and Eliot C. Roberts. 1967. Chemical Lawnmowers. Iowa Farm Science. 22: 19-21.
1.Whitcomb, Carl E., and Eliot C. Roberts. 1967. Turgrass Growth with Wetter Water. The Golf Superintendent. 35: 24-30.

 

 106.Whitcomb, Carl E. and B.L. Appleton. 1984. Effects of Water Quality on Plant Growth in Containers. Nursery Research Conf. Atlanta, GA.
105.Appleton, B.L. and C.E. Whitcomb 1984. Establishment of Container Grown Ornamentals. Nursery Research Conf. Atlanta, GA.
104.Whitcomb Carl E. and Jerry D. Williams. 1984. A Container to Stimulate Root Branching. Nursery Research Conf. Atlanta, GA.
103.Whitcomb, Carl E. 1984. Propagating Trees from Cuttings. Nursery Research Conf., Atlanta, GA.
102.King, Edward, Carl E. Whitcomb, and R. Price. 1984. Control of Pine Tip Moth in Containers. Oklahoma Nursery and Landscape Conference.
101.Mahoney, G.W.A. and Carl E. Whitcomb. 1984. Sol-Air Temperatures of Nursery Pots. Summer meeting of the American Society of Agricultural Engineers -paper #84.
100.Hickman, Gary and Carl E. Whitcomb. 1983. Propagating Lacebark Elm, U. parvifolia, from cuttings. Nursery Research Conference, 28th Annual Meeting, Atlanta, GA.
99.Whitcomb, Carl E. and Ralph Reiger. 1983. A Root control System for Growing Trees in the Field. Nursery Research Conference, 28th Annual Meeting, Atlanta, GA.
98.King, James E., Richard G. Price, Kenneth N. Pinkston, and Carl E. Whitcomb. 1983. Control of Pine Tip Moth in Containers. Nursery Research Conference, 28th Annual Meeting, Atlanta, GA.
97.Appleton, Bonnie and Carl E. Whitcomb. 1983. Seed Germination Position Affects Root and Stem Quality. Nursery Research Conference, 28th Annual Meeting, Atlanta, GA.
96.Appleton, Bonnie and Carl E. Whitcomb. 1983. Effects of Transplanting Date and Container Size on the Growth of Tree Seedlings. Nursery Research Conference, 28th Annual Meeting, Atlanta, GA.
95.Babcock, F.E. and Carl E. Whitcomb. 1983. N-P-K Effects on Tree Seedling Growth. Nursery Research Conference, 28th Annual Meeting, Atlanta, GA.
94.Mahoney, George W. A. and Carl E.Whitcomb. 1983. Insulated Pallets as Winter Protection for Nursery Stock. Summer meeting ASAE. ASAE Paper #83-4079.
93Whitcomb, Carl E. 1982. Plant Establishment Techniques. Arkansas Horticulture Society, Ft. Smith, AR.
92.Whitcomb, Carl E. 1982. New Plants for the Landscape. Arkansas Horticulture Society, Ft. Smith, AR.
91.Appleton, Bonnie and Carl E. Whitcomb. 1982. Effects of Container Size and Transplanting Date on the Growth of Tree Seedlings. U.S.Forest Service, Western Forest Nursery Conf., OKC, OK, Aug. 1982.
90.Whitcomb, Carl E. 1982. Propagating Under a Wet Tent. So. Region Int. Plant Prop. Soc., Norfolk, VA, Dec. 1982.
89. Williams, Jerry D. and Carl E. Whitcomb. 1982. Evaluation of an Insulated Pallet for Overwintering Container Nursery Stock. Proc. Nursery Research Conference, 27th Annual Meeting, Atlanta, GA. 27: 72-73.
88.Kenna, Susan W. and Carl E. Whitcomb 1982. . Plant Nutrition in Light Weight Media. Proc. Nursery Research Conference, 27th Annual Meeting, Atlanta, GA. 27: 72-73.
87.Wooten, Kitty and Carl E. Whitcomb. 1982. Plant Nutrition in light Weight Media. Proc. Nursery Research Conference, 27th Annual Meeting, Atlanta, GA. 27: 52-54.
86.Babcock, Frank, Bonnie Appleton, and Carl E. Whitcomb. 1982. Phosphorus Nutrition of Nursery Stock. Proc. Nursery Research Conference, 27th Annual Meeting, Atlanta, GA. 27: 38-40.
85.Gibson, Phillip and Carl E. Whitcomb. 1982. Substituting Starch Based Absorbants for Peat. Proc. Nursery Research Conference, 27th Annual Meeting, Atlanta, GA. 27: 23-25.
84.Threadgill, Chris C. and Carl E. Whitcomb. 1982. Effects of Container Depth Diameter and Media on the Rooting of Cuttings. Proc. Nursery Research Conference, 27th Annual Meeting, Atlanta, GA. 27: 10-14.
83.Appleton, Bonnie L. and Carl E. Whitcomb. 1982. Effects of Container Size and Transplanting Date on the Growth of Tree Seedlings. Proc. Nursery Research Conference, 27th Annual Meeting, Atlanta, GA. 27: 6-8.
82.Murray, S., G.W.A. Mahoney and Carl E. Whitcomb. 1982. Conductivity of Potting Soils. Summer meeting ASAE. Madison, WI. ASAE Paper #82-054.
81.Shoup, S. and Carl E. Whitcomb. 1981. Relationships Between Landscape Trees and Ground Covers. Proc. Nursery Research Conference, 26th Annual Meeting, Atlanta, GA.
80. Whitcomb, Carl E. 1981. Propagating Under a Wet Tent. Proc. Nursery Research Conference, 26th Annual Meeting, Atlanta, GA.
79.Reavis, R. and Carl E. Whitcomb. 1981. Herbicide Combinations and Weed Control in Field Nursery Stock. Proc. Nursery Research Conference, 26th Annual Meeting, Atlanta, GA.
78. Whitcomb, Carl E. 1980. Nutrition During Propagation. So. Region, Int. Plant Prop. Soc., 5th Annual Meeting, Huntsville, AL.
77.Whitcomb, Carl E. 1980. Micromax-Micronutrients for Improved Plant Growth. So. Region, Int. Plant Prop. Soc., 5th Annual Meeting, Huntsville, AL.
76.Mahoney, G.W.A., M.D. Paine, and Carl E. Whitcomb. 1980. Performance of an Insulated Solar Greenhouse. American Soc. Agri. Eng. Summer Meeting.
75.Whitcomb, Carl E., R. Reiger, and M. Hanks. 1980. Growing Trees in Wire Baskets. Nursery Research Conference, 25th Annual Meeting, Atlanta, GA.
74.Whitcomb, Carl E. and Mike Carney. 1980. Effects of Slow-Release Sources of Nitrogen and Potassium on the Propagation and Subsequent Growth of Ilex crenata 'Hetzi", Pyracantha coccinea and Rhododendron spp. Nursery Research Conference, 25th Annual Meeting, Atlanta, GA.
73.Whitcomb, Carl E. 1980. Effects of Time of Digging Planting and Storage on Survival of Field Grown Bare-root Mugo Pine in Containers. Nursery Research Conference, 25th Annual Meeting, Atlanta, GA.
72.Shoup, S. and Carl E. Whitcomb 1980. Using Activated Carbon to Inactivate Herbicides in the Landscape. Nursery Research Conference, 25th Annual Meeting, Atlanta, GA.
71.Whitcomb, Carl E. 1980. The Carryover Effect of Micronutrients in Container Production. Nursery Research Conference, 25th Annual Meeting, Atlanta, GA.
70.Whitcomb, Carl E. 1979. The Establishment of Urban Trees. Int. Soc. of Arboriculture Annual Mtg., San Diego, CA.
69.Shoup, S. and C.E. Whitcomb. 1979. Interactions between Trees and Ground Covers. Nursery Research Conference, 24th Annual Meeting, Atlanta, GA.
68.Reavis, R. and C.E. Whitcomb. 1979. Herbicide Combinations for Weed Control in Field Nursery Stock. Nursery Research Conference, 24th Annual Meeting, Atlanta, GA.
67.Whitcomb, C.E. 1979. Growing Plants in Poly Bags. Nursery Research Conference, 24th Annual Meeting, Atlanta, GA.
66.Knapp, M. and C.E. Whitcomb. 1979. Growing Mugo Pine in Containers. Nursery Research Conference, 24th Annual Meeting, Atlanta, GA.
65.Whitcomb, C.E. 1979. Micromax-A Computerized Micronutrient Fertilizer. Nursery Research Conference, 24th Annual Meeting, Atlanta, GA.
64.Reavis, R. S. Shoup, and C.E. Whitcomb. 1978. Effects of Pruning on Establishment of Bareroot Deciduous Trees. Nursery Research Conference, 23rd Annual Meeting, Atlanta, GA.
63.Gibson, J., A. Storjohann, and C.E. Whitcomb. 1978. Effects of Transplant Time on Growth of Container Grown Tree Seedling Nursery Research Conference, 23rd Annual Meeting, Atlanta, GA.
62.Whitcomb, C.E. 1978. A Propagation System for Nursery Liners. Nursery Research Conference, 23rd Annual Meeting, Atlanta, GA.
61.Storjohann, A. and C.E.Whitcomb. 1978. Developing a Micronutrient Fertilizer. Nursery Research Conference, 23rd Annual Meeting, Atlanta, GA.
60.Whitcomb, C.E., B. Geer, and T. Wheeless. 1978. A Comparison of Micronutrient Sources. Nursery Research Conference, 23rd Annual Meeting, Atlanta, GA.
59.Goodale, T.W. and C.E. Whitcomb. 1978. Determination of an Economic Optimum Fertility and Container Volume Combination for Six Woody Ornamental Species. Nursery Research Conference, 23rd Annual Meeting, Atlanta, GA.
58.Payne, M.C., G.W. A. Mahoney, and C.E. Whitcomb. 1979. Predicting Minimum Overnight Temperatures in Solar Greenhouses. Amer. Co. Agri. Engr. Regional Meeting, Hot Springs, AR. Paper #696.
57.Whitcomb, Carl E. 1977. A Solar Greenhouse for Propagation. Eastern Region, Int. Plant Prop. Soc., Annual Meeting, Columbus, OH. December 7, 1977.
56.Whitcomb, Carl E. 1977. A Self-Contained Solar Heated Greenhouse. Nursery Research Conference, 22nd Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 22: 145.
55.Whitcomb, Carl E. and Lisa Euchner. 1977. Effects of Shade Levels on Growth of Container Nursery Stock. Nursery Research Conference, 22nd Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 22: 57-58.
54.Ward, James D. and Carl E. Whitcomb. 1977. Effects of IBDU, Osmocote and Liquid on Growth of Ilex crenata 'Hetzi'. Nursery Research Conference, 22nd Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 22: 5.
53.Ward, James D. and Carl E. Whitcomb. 1977. Effects of Osmocote and Perk in the Rooting Medium on Liner Quality. Nursery Research Conference, 22nd Annual Meeting, Atlanta, GA. Abst; Nursery Res. Conf. Proceedings. 22: 169.
52.Dickinson, Sancho M. and Carl E. Whitcomb. 1977. Fall vs. Spring Transplanting of Container Nursery Stock. Nursery Research Conference, 22nd Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 22: 58-59.
51.Storjohann, Allen, Toby Goodale, and C.E. Whitcomb. 1977. Propagating the Lacebark Elm, Ulmus parvifolia. Nursery Research Conference, 22nd Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 22: 168.
50.Hathaway, R.D. and C.E. Whitcomb. 1977. Nutrition of Container Grown Tree Seedlings. Nursery Research Conference, 22nd Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 22: 6.
49.Hathaway, R.D., T.W. Goodale, J.D.Ward, and C.E. Whitcomb. 1976. Using Roundup (Glyphosate) for Bermudagrass Control in the Landscape. Nursery Research Conference, 21st Annual Meeting, Atlanta, GA. August 1976.
48.Goodale, Toby W. and C.E. Whitcomb. 1976. Effects of Tolban, Devrinol, and Ronstar on Weed Control in Containers. Nursery Research Conference, 21st Annual Meeting, Atlanta, GA.
47.Ward, J.D. and C.E. Whitcomb 1976. Effects of Osmocote 18-6-12 on Quality and N, P, K Levels in Tissue of Ilex crenata 'Hetzi' Liners. Nursery Research Conference, 21st Annual Meeting, Atlanta, GA.
46.Remon, J. and C.E. Whitcomb. 1976. Curing Iron Chlorosis in the Landscape: Two Alternative Methods. Nursery Research Conference 21st Annual Meeting, Atlanta, GA.
45.Hathaway, Robert D. and C.E. Whitcomb. 1976. Effects of 5 Levels of Osmocote 18-6-12 and 3 Container sizes on Growth and Development of Shumard Oak Seedlings. Nursery Research Conference, 21st Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 21: 38.
44.Hall, Gordon C. and C.E. Whitcomb. 1975. Plant Water Loss as Influenced by Antitranspirants. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 20: 50.
43.Schulte, Joseph R. and C.E. Whitcomb 1975. Effects of Soil Amendments on Growth of Silver Maple Trees in the Landscape. Nursery Research Conference, 20th Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings 20: 49.
42.Whitcomb, C. E. 1975. Response of Juniperus chinensis 'Pfitzeriana' and Ilex cornuta 'Burford' to Dolomite and Single Superphosphate. Nursery Research Conference, 20th Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 20: 34.
41.Whitcomb, C.E. 1975. Response of Ilex cornuta 'Burford' to Osmocote, Micronutrients and Container Size. Nursery Research Conference, 20th Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 20: 32.
40.Dave, Randy E. and C.E. Whitcomb. 1975. Effects of Propagation Container Size on Top and Root Development of Tree Seedlings. Nursery Research Conference, 20th Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 20: 31.
39.Whitcomb, Carl E. 1975. Developing a Long-term, Slow-release Fertilizer for Container Production. Nursery Research Conference, 20th Annual Meeting, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 20: 30.
38.Hall, Gordon C. and C. E. Whitcomb. 1974. Propagating Cuttings Without Mist. Int. Plant Prop. Soc. Annual Meeting of the Eastern Region, Tulsa, OK.
37.Whitcomb, C.E. 1974. Development of a New Low-salt, Slow-release Fertilizer for Ornamental Crops. Amer. Soc. for Hort. Sci. Annual Mtg., Guelph, Ontario, Canada.
36.Whitcomb, C.E. 1974. Response of Nursery Stock to 3 Levels of Dolomite and 3 Levels of Single Superphosphate in the Growing Medium of 3 Container sizes. Amer. Soc. for Hort. Sci. Annual Meeting, Guelph Ontario, Canada. Abst: Hortscience. 9: 295.
35.Whitcomb, C.E., D.E. Carlson, and R.D. Hathaway. 1974. Effects of Container Size and Fertilizer Level on Growth and Quality of Nursery Stock. Amer. Soc. for Hort.Sci. Annual Meeting. Abst: HortScience. 9: 277.
34.Butler, J.F. and C.E. Whitcomb. 1973. Movement of Trifluralin, Nitralin, and Oxyzalin in Containers. Western Region of the Amer. Soc. for Hort. Sci. Annual Meeting, Ft. Collins, CO.
33.Whitcomb, C.E. 1973. Container Production of Woody Ornamentals. Region of the Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience.
32.Whitcomb, C.E. and W.L. Curry. 1973. Herbicides for Weed Control in Container Grown Ornamentals. Southern Weed Sci. Soc. Annual Meetings, New Orleans, LA. Abst: Proceedings of the Southern Weed Sci. Soc.
31.Whitcomb, C.E. 1973. Effects of Propagation Pot on the Rooting of Woody Ornamentals. Amer. Soc. for Hort. Sci. Annual Meeting, Raleigh, NC. Abst: HortScience. 8: 283.
30.Whitcomb, C.E. 1973. Effects of Multiple Applications of Trifluralin on Weed Control and Growth of Container Grown Woody Ornamentals. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 8: 265.
29.Bisher, M. P. and C.E. Whitcomb. 1973. The Influence of Fertilization, Propagation Pot Size and Holding Time on Woody Ornamental Liners. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 19: 23,24.
28.Whitcomb, C. E. 1972. Effects of Method of Application on Movement of Treflan in Containers. Amer. Soc. for Hort. Sci. Annual Meeting, St. Paul, MN. Abst: HortScience. 7: 341.
27.Whitcomb, C.E. 1972. Effects of Container Size, Number of Plants per Container and Fertilizer Levels on Growth and Quality of Ligustrum japonicum. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 7: 321.
26.Whitcomb, C.E. and Linda Clark. 1972. Effects of SD8339 (a Plant Growth Regulator) on Bud Breaks of Established Viburnum suspensum. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 17: 48.
25.Rackley, J.G. and C.E. Whitcomb. 1972. Effects of Number of Plants per Container, Rooting Methods, and Fertilization in Mist on Growth and Quality of Carissa grandiflora 'Boxwood Beauty'. Nursery Research Conference, Atlanta, GA. Abst; Nursery Res. Conf. Proceedings. 17: 48.
24.Rackley, J. G. and C.E. Whitcomb. 1972. Effects of Propagation Methods, Fertilizer Levels and Time of Transfer to Larger Containers on Production Time and Quality of Viburnum suspensum. Nursery Research Conference Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 17: 12.
23.Stoner, D.T. and C.E. Whitcomb. 1972. Effects of Fertilizer Levels on Root and Top Growth of Juniperus chinensis 'Hetzi' at Different Times of Year. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 17: 11.
22. Whitcomb, C. E., D. T. Stoner, J.G. Rackley, and R.A. Sanger. 1971. Sterilization of Nursery Aisles with Herbicides. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 79.
21.Whitcomb, C.E. and C.L. Chambers. 1971. Effects of Varying Ratios of Peat and Builders Sand on Herbicide Movement in Containers. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 78.
20.Butler, J.F. and C.E. Whitcomb. 1971. Effects of Application Methods on Herbicide Movement in Containers. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 77,78.
19.Allen, T.M. and C.E. Whitcomb. 1971. Growth Control of Bahiagrass Using Maintaining Quel (EL-531) and Maleic Hydrazide. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 71,72.
18.Whitcomb. C.E., J.S. Southwell, W. Auxier, and G.W. Swan. 1971. Propagation of Semi-hardwood Cuttings Using Antitranspirants and No Mist. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 64,65.
17.Whitcomb, C.E. and D.T. Stoner. 1971. Effects of Three Fertilizers, Each at Three Rates Annually and Tree Winter Reductions on Growth, Quality and Winter Damage of Container Grown Viburnum suspensum and Acacia farnesiana. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 13,14.
16.Whitcomb, C.E. 1971. Effects of Container Sidewall Porosity, Growing Medium and Presence or Absence of Micronutrient Fertilizer on Root and Top Growth of Carissa grandiflora 'Boxwood Beauty'. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 13.
15.Rackley, J.G. and C.E. Whitcomb. 1971. Effects of Container Size Fertilizer Level and Number of Plants per Container on Production Time and Quality of Ligustrum japonicum. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 13.
14.Whitcomb, C.E. J.S. Southwell, and J. G. Rackley. 1971. Effects of Location of Cutting on Root Quality and Subsequent Plant Quality of Ligustrum japonicum and Viburnum suspensum. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 63.
13.Whitcomb, C.E. 1971. Effects of Various Rates of Micronutrient Fertilizer and Nitrogen on Growth and Quality of Container Grown Viburnum suspensum, Ligustrum japonicum, Carissa grandiflora 'Boxwood Beauty', and Juniperus horizontalis 'Bar Harbor'. Nursery Research Conference, Atlanta, GA. Abst: Nursery Res. Conf. Proceedings. 16: 14.
12.Jones, H.C., C.E. Whitcomb, J. N. Joiner, and C. A. Conover. 1971. Effects of Container Size, Fertilizer Level and Watering Frequency on Top and Root Growth And Root-shoot Ratio of Ligustrum japonicum and Juniperus chinensis 'Pfitzer blue'. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 6: 44.
11.Whitcomb, C.E. 1971. Response of Four Container Grown Woody Ornamentals to Varying Rates of Micronutrients and Nitrogen. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 6: 44.
10.Whitcomb, C. E. 1971. Rooting of Semi-hardwood Cuttings; Mist vs. Antitranspirants and No Mist. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 6: 22.
9.Whitcomb, C.E. and R. M. Livermore. 1971. Effects of Maintain, CR125 on Growth of Photinia glabra, Buxus microphylla, Trachelosperum jasminoides 'nana' and St. Augustinegrass. Southern Region, Amer. Soc. for Hort. Sci. Annual Meeting Abst: Proceedings of the Assoc. of Southern Agri. Works Inc. 68: 186.
8.Jones, H.C. and C. W. Whitcomb. 1971. Effects of Pruning to Various Distances from the Terminal on Growth Response and Pruning Index of Four Woody Shrubs. Southern Region, Amer. Soc. for Hort. Sci. Annual Meeting. Abst: Proceedings of the Association of Southern Agri. Workers, Inc. 68: 186.
7.Dean, S. G., C.E. Whitcomb, and J. N. Joiner. 1970. Effects of Four Warm Season Turfgrasses on Growth and Development of Four Shrub Species Maintained at Three Levels of Competition. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 5: 336.
6.Jones, H. C., C.E. Whitcomb, and C.A. Conover. 1970. Effects of Four Herbicides, Each at Four Rates on Weed Control and Damage to Four Container Grown Woody Ornamentals. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 5: 363.
5.Whitcomb C.E. 1970. Effects of Roots of Dormant Trees on Establishment and Growth of Four Cool Season Grasses. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 5: 336.
4.Whitcomb, C.E. and E. C. Roberts. 1969. Relationships of Ornamental Plants to the Urban Environment-A New Concept in Horticultural Teaching. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 4: 190.
3.Whitcomb, C.E. and E.C. Roberts. 1969. Tree-turf Interactions. Amer. Soc. for Hort. Sci. Annual Meeting. Abst: HortScience. 4: 172.
2.Whitcomb, C.E. and E.C. Roberts. 1967. Root Competition between Trees and Turfgrass. Amer. Soc. for Hort. Sci. Annual Meeting.
1.Whitcomb, C.E. and E.C. Roberts. 1967. Influence of Soil on Surfactant Activity. Amer. Soc. for Hort. Sci. Annual Meeting.

 

 Member, Graduate Faculty, University of Florida
Member, Graduate Advisory Committee:
Stanley G. Dean
Ornamental Horticulture
Harold C. Jones
Ornamental Horticulture
Richard A. Sanger
Ornamental Horticulture
Jacob Stowers
Forestry
Bobby G. Joyner
Plant Pathology
 

Chairman, Graduate Advisory Committee:
James D. Ward,
Ornamental Horticulture
M.S. "Effects of Time of Removal of Seedlings from Flat, Taproot Pruning and Nutritional Level of Growth of Tops and Roots and Root Quality of Container Grown Quercus virginiana and Cornus florida Seedlings".
James D. Ward,
Ornamental Horticulture
M.S. "Effects of Time of Removal of Seedlings from Flat, Taproot Pruning and Nutritional Level of Growth of Tops and Roots and Root Quality of Container Grown Quercus virginiana and Cornus florida Seedlings".
Mark S. Bischer,
Ornamental Horticulture
M.S. "Effects of Time in Mist and Fertilization in the Rooting Medium on Rooting of Viburnum suspensum Cuttings".
 

Full Member, Graduate Faculty, Oklahoma State University since 1975.
Member of Graduate Advisory Committee:
Robert Moon
John Currie
Lea Ann Nehr
Phyllis Roggow
Le Lin
Linda Carrora
Richard Kerbo
Ann Moffitt
Robert Buswell
B.D. McCraw
Phillip Perryman
Mary Ann Haliburton
James Lemon
Roger Stewart
Steve Murray
Kathryn McKnight
Robert Holland
 

Chairman, Graduate Advisory Committee:
Ray McKerley, 1973
M.S. "Effects of Levels of Nitrogen and Micronutrients and Number of Plants per Container on Production of Greenhouse Tomatoes".
Roger R. Bean, 1975
M.S. "Weed Control in the Nursery".
Gordon C. Hall, 1974
M.S. "Effects of Antitranspirants on Rooting of Cuttings".
Joseph Schulte, 1976
M.S. "The Evaluation of Soil Amendments as an Aid to Plant Establishment in the Landscape".
James D. Ward, 1977
Ph.D. "Nutrition of Ilex crenata 'Hetzi' during Propagation and Production".
Robert D. Hathaway, 1977
Ph. D. "Effects and Root Modification in Containers on Propagation and Subsequent Growth of Tree Seedlings".
Toby Goodale, 1978
M.S. "Determining the Economic Optimum Fertility and Container Volume for Six Ornamental Species".
John Gibson, 1979
M.S. "Effects of Container Size and Fertility Level on Growth of Tree Seedlings in Square Bottomless Containers".
Allan Storjohann, 1980
M.S. "Development of a Micronutrient Fertilizer".
Gerrit Hans Oonk, 1981
M.S. "Micronutrient Nutrition on Container Grown Ornamentals".
Richard Reavis, 1981
M.S. "Herbicide Combinations for field Nursery Stock".
Stephen C. Shoup, 1981
M.S. "Relationships Between Trees and Groundcovers".
George Michael Carney, 1981
M.S. "Performance of Chrysanthemum morifolium 'Mandalay', 'Peacock', and 'Winter Carnival' in a Conventional and Solar Heated Greenhouse to Growing Media and Nutritional Conditions".
Ellabeth Susan Henderson, 1981
M.S. "Effect of Rate and Time of Application of Three Micronutrient Products during Production of Woody and Herbaceous Species".
Susan W. Kenna, 1982
M.S. "Hardwood Chips as an Alternative Media for Container Plant Production".
Larry Nichols, 1982
M.S. "Nutrition of Nursery Plants during Propagation and Production".
Gary Hickman, 1983
M.S. "Propagating Lacebark Elm from Cuttings".
Bonnie L. Appleton, 1983
Ph.D. "Container Nursery Design: Factors Affecting Efficient Use of Land, Labor, and Resources".
C. Christopher Threadgill, 1983
M.S. "Effects of Container Depth, Diameter, and Media on Rooting and Performance of Cuttings".
Frank Babcock, 1983
M.S. "Effects of N, P, K Nutrition on Tree Seedlings Growth and Development".
Mark House, 1984
M.S.

 

85.International Plant Propagation Society, Tallahassee, FL. Nov. 26-28, 1984.

84.Oklahoma Turfgrass Conference, OKC, OK. Nov. 9, 1984. "Plants to Replace Winter Losses." 83.Hawaii's Nurserymen's Association Annual Convention, Honolulu, HI. October 16-17, 1984. 82.American Association of Nurserymen, National Convention, San Antonio, TX. July 15, 1984. "Innovations and the Future Nursery Industry".

 81.Tulsa Chapter, American Society of Landscape Architecture. Tulsa, OK. June 2, 1984. "Nature Plants for the Landscape". 

80.Tulsa Association of Nurserymen. Tulsa, OK. April 3, 1984. "Coping with Winter Injury in the Landscape".  

79.Oklahoma Christmas Tree Growers. Stillwater, OK. March 31, 1984. "Accelerating Tree Growth". 

78.Canadian Chapter, International Society of Arboriculture, Toronto, Ontario, Canada. Feb. 21-22, 1984. "Rapid Establishment Reduces Plant Stress", "Techniques for Reduced Labor and Plant Stress During Production". 

77.Central Florida's Nurseryman's Association. Orlando, Florida. Feb. 16, 1984. "Producing Plants in Containers: Understanding the System". 

76.American landscape Association Annual Conference and Education Clinic. Louisville, KY, Feb. 6 and 7, 1984. "Aids to Plant Establishment", "Making Field Production of Trees Easy". 

75.Oklahoma Christmas Tree Growers Meeting, Muskogee, OK. Feb. 2, 1984. "Weed Control in Christmas Tree Plantings". 

74.Landscape Ontario Conference, Toronto, Ontario, Canada. Jan. 26, 1984. "Simplifying Field Production of Trees". 

73.Okla. Turfgrass Conf., Tulsa, OK. Nov. 14-16, 1983. "Where are the Tree Roots?"

 72.Okla. Parks and Recreation Conf., Western Hills Lodge, Wagoner, OK. Nov. 8, 1983. "Utilizing Native Plants in Parks and Recreational Areas". 

71.Okla. Greenhouse Growers Conf., Stillwater, OK. Nov. 3-4, 1983. "Innovations in Pot Plant Production".

 70.Okla. Nurserymen's Assoc., Stillwater, OK. Oct. 5, 1983. "Solving the Iron Chlorosis Problem".  69.Mid-Atlantic Chapter, International Soc. of Arboriculture, Ocean City, MD. Sept. 30, Oct. 1, 1983. "Planting Techniques for Shade Trees", "Tree Roots; Growth and Development". 

68.Tulsa Nurserymen's Assoc., Tulsa, OK. Sept. 6, 1983. "The Lingering Effect of Drought Stress". 67.Texas Chapter, International Soc. of Arboriculture, Ft. Worth, TX. June 16-18, 1983. "Tree Planting and Transplanting". 

66.Monsanto Co. Nursery conf. On Roundup Applications, Fountainhead Lodge, Eufala, OK. May 19, 1983. "Uses and Misuses of Roundup Herbicide in the Nursery and Landscape Industries". 65.South Florida Nurserymen's Assoc. April 18-20, 1983. Talks in West Palm Beach, Ft. Lauderdale and Homestead, FL on "Innovations in the Container Nursery Industry". 

64.Tulsa Nurserymen's Assoc., Tulsa, OK. March 1, 1983. "Insuring Transplanting Success". 63.Southwest Parks and Recreation Conf., Lake Texoma Lodge. Jan. 24, 1983. "Root Development of Trees". 

62.Australian Nurserymen's Assoc. June 10- July 25, 1982. Seminar presentation in each of the 7 Australian States. 

61.Okla. Turfgrass Conf., OKC, OK. Dec. 8-9, 1982. "Compatibility of Trees & Turfgrass". 60.Landscape Atlantic Conf., St. John, New Brunswick. Dec. 3-4, 1982. "Productive Landscape Trees" and "Plant Establishment and Root Growth". 

59.Central Florida Nursery Short course, Tampa, FL. Nov. 10, 1982. "Understanding Plant Propagation". 

58.Okla. Nurserymen's Assoc. Annual Meeting. Oct. 8, 1982. "Root Development following Transplanting". 

57.Tulsa Nurserymen's Assoc. Sept. 14, 1982. "Nursery Operations in Australia". 

56.Humber Arboretum Landscape Conf., Toronto, Canada. Mar. 20, 1982. "Growing Trees in Wire Baskets" and "Tree Spades and Transplanting". 

55.Texas Assoc. of Nurserymen Container Conf., Houston, TX. Mar. 16, 1982. "Micronutrient Nutrition of Container Plants". 

54.Northern Ohio Nursery Conf., Cleveland, OH. Feb. 16-17, 1982. "Container Research for the Nurseryman" and "New Concepts in Landscape Practices".

 53.Landscape Ontario Conf., Toronto, Canada. Jan. 21-22, 1982. "Techniques for Landscape Plant Establishment". 

52.Hawaii Ornamentals Short Course, Honolulu, HI. Jan. 13-15, 1982. "Nutrition of Container Nursery Stock" and "Soil Amendments & Landscape Plantings". 

51.Grounds Maintenance Workshop, OSU. Nov. 19, 1981. "Maintaining Trees in Urban Areas". 50.Okla. Nurserymen's Assoc. Annual Mtg., Okla. City, OK. Nov. 10, 1981. "Managing Plants in Retail Nurseries". 

49.GA Nurserymen's Assoc. Container Conf., Trifton, GA. Sept. 22-23, 1981. "Nutrition of Container Stock" and "Managing the Container System". 

48.Central Florida Nurserymen's Seminar, Orlando, FL. Sept. 3, 1981. "Plant Nutrition During Propagation and Production". 

47.Nursery Producers conf., Aukland and Christchurch, New Zealand. June 28 through July 9, 1981. "Managing the Container Production System".

 46.TX. Assoc. of Nurserymen. 1st Annual container Growers Conf., Houston, TX. May 18, 1981. "Plant Nutrition During Propagation". 

45.Tulsa Nurserymen's Association, Tulsa, OK. April 7, 1981. "Herbicides for the Landscape and Nursery".

 44.MN Nurserymen's Assoc. Winter Meeting, St. Cloud, MN. Jan. 31 through Feb. 1, 1981. "The Importance of Plant nutrition" and "Aids to Plant Establishment and Growth". 

43.Lecture by phone to the DE Nurserymen's Assoc. Mtg., Wilmington, DE. Jan. 29, 1981. "Nutrition of Container Plants".

 42.Western Assoc. of Nurserymen's Mtg., Kansas City, MO. Jan. 5-6, 1981. "Understanding the Container System" and "Container Plant Nutrition". 

41.VA Nurserymen's Assoc. Annual Mtg., Virginia Beach, VA. Nov. 5-6, 1980. "Solar Heating of Greenhouses", "Transplanting Landscape Trees" and "Micronutrients for Pot Plants". 40.Symposium on Landscape Mgmt., Humber College, Toronto, Canada. Oct. 18, 1980. "Landscape Management and Soil Amendments".

 39.Okla. Nurserymen's Assoc. Annual Mtg., Tulsa, OK. Oct. 6, 1980. "Nursery Operations in Australia".

 38.Okla. Chapter Soc. Amer. Foresters Summer Mtg., Stillwater, OK. Sept. 12, 1980. "Growing Tree Seedlings in Containers".

 37.New South Wales Nurserymen's Assoc., Castle Hill, NSW, Australia. July 11, 1980. "Growing Plants in Containers", "Weed Control in the Nursery" and "Transplanting Nursery Stock". 

36.Tulsa Nurserymen's Assoc., Tulsa, OK. May 6, 1980. "Nutrition of Container Nursery Stock" and "Drainage in the Container System". 

35.NJ Nurserymen's Assoc., Cherry Hill, NJ. April 1, 1980. "Nutrition of Container Nursery Stock" and "Drainage in the Container System". 

34.European Container Nutrition Conf., Amsterdam, Netherlands. March 7, 1980. "Micronutrient Nutrition in Containers". 

33.Australian Nurserymen's Assoc. Conf., Sydney, Australia. Feb. 26-28, 1980. "Understanding the Container System" and "Transplanting Trees & Shrubs". 

32.Western Assoc. of Nurserymen Annual Mtg., Kansas City, MO. Jan. 7-8, 1980. "Soil Amendments for Establishing Trees" and "Techniques to Aid Tree Growth". 

31.Okla. Turfgrass Found., Tulsa, OK. Dec. 13, 1979. "Cold Hardy Landscape Plants". 

30.MN Nurserymen's Assoc., St. Paul, MN. Dec. 2-4, 1979. "Growing in Containers" and "Establishing Plants in the Landscape". 

29.Grounds Maintenance Workshop, OSU, Stillwater, OK. Nov. 29, 1979. "To Fertilize or Not to Fertilize Trees and Shrubs". 

28.TX Greenhouse Growers Conf., Bryan, TX. Nov. 8-9, 1979. "Understanding the Container System" and "Can Solar Greenhouses Work?". 

27.Okla. Greenhouse Growers Conf., Stillwater, OK. Nov. 1, 1979. "An Update on Solar Greenhouses". 

26.FL Nurserymen's Trade Show, Tampa, FL. Sept. 27-29, 1979. "Micromax, an Improved Micronutrient Fertilizer in Containers". 

25.Pacific Hort. Trade Show, Long Beach, CA. Sept. 6-8, 1979. "Micromax, an Improved Micronutrient Fertilizer in Containers". 

24.TN Nurserymen's Assoc., Nashville, TN. Aug. 23-25, 1979. "Growing in a Container System". 23.TX Nurserymen's Assoc. Trade Show, Dallas, TX. Aug. 19-231, 1979. "Micromax, an Improved Micronutrient Fertilizer in Containers". 

22.Int. Soc. of Arboriculture, San Diego, CA. Aug. 12-14, 1979. "Establishing Trees in the Landscape". 

21.TX Vegetable Growers Conf., Bryan, TX. July 16-17, 1979. "Growing in a Container System" and "Improvements in Solar Heating". 

20.TVA Conf. on Alternate Heating, Decatur, AL. June 28, 1979. "Is a Solar Greenhouse Practical?". 19.NB Arborists and Nurserymen's Assoc., Lincoln, NB. Feb. 16, 1979. "Getting Trees Off to a Good Start"

. 18.Midwestern Chapter, Int. Soc. of Arboriculture, St. Louis, MO. Jan. 31 through Feb. 1, 1979. "Aiding the Establishment of Trees".

 17.NC Nurserymen's Assoc., Pinehurst, NC. Jan. 7-9, 1979. "Weed Control for Nursery Stock" and "Solar Greenhouse Systems".

 16.WI Landscape Federation, Madison, WI. March 5-6, 1978. "Soil Amendments in the Planting Hole" and "Aids to Plant Establishment". 

15.WI Arborists Assoc., Green Bay, WI. Feb. 8-9, 1978. "What is a $5.00 Planting Hole?" and "Speeding up Tree Growth".

 14.KS State Shade Tree Conf., Manhattan, KS. Jan. 12-13, 1978. "Aiding Plants in the Landscape" and "Improving Tree Growth Through Root Modification".

 13.AR Nurserymen's Assoc. Annual Conf., Little Rock, AR. Jan 8, 1978. "Stimulating New Plants in the Landscape".

 12.OK-TX Greenhouse Growers Conf., Stillwater, OK. Oct. 28, 1977. "A Solar Heated Greenhouse". 11.27th Annual Mtg., Okla. Section, Amer. Soc. Agri. Eng., Stillwater, OK. Oct. 14, 1977. "A Solar Heated Greenhouse at OSU". 

10.Tulsa Assoc. of Nurserymen Annual Banquet, Tulsa, OK. Feb. 1, 1977. "Landscape Establishment of Trees". 

9.KS State Shade Tree Conf., Manhattan, KS. January, 1976. "Tree-Grass Root Competition" and "Soil Amendments for Establishing Trees". 

8.Int. Turfgrass Conf., Minneapolis, MN. Sponsored by the Golf Course Superintendents Assoc. of America. February, 1976. "Care of Woody Plants in the Landscape". 

7.Int. Turgrass Conf., sponsored by the Golf Course Superintendents Assoc. of Amer., New Orleans, LA. February, 1975. "Selecting Plants for the Golf Course" and "Using Foliage Plants in Indoor Landscaping". 

6.TX Assoc. of Nurserymen Short Course, Austin, TX. January, 1975. "Maintaining Ornamentals in Retail Sales Areas".

 5.Hort-I-Scope Int. Educational Conf., sponsored by the FL Nursery and Growers Assoc., Tampa, FL. October, 1974. "Preventing the Container Culture Coronary". 

4.Western Region of the Amer. Soc. For Hort. Sci. OSU, Fort Collins, CO. June, 1973. "Container Production of Woody Ornamentals". 

3.GA Nurserymen's Assoc. Short Course, Univ. of GA, Athens, GA. January, 1972. "Soil Aeration and Drainage in Container Nursery Production" and "Establishment of Container Grown Nursery Stock in the Landscape".

 2.Nursery Trade Conf., Pershore College of Hort., Pershore, Worcestershire, England. 1970. A taped talk "Plant Propagation Using Antitranspirants as a Substitute for Mist". 

1.Int. Turfgrass Conf., sponsored by the Golf Course Superintendents Assoc. of Amer., San Francisco, CA. February, 1968. "Competition Between Trees and Turfgrasses".