Forage and Livestock Production Unit Site Logo
ARS Home About Us Helptop nav spacerContact Us En Espanoltop nav spacer
Printable VersionPrintable Version     E-mail this pageE-mail this page
Agricultural Research Service United States Department of Agriculture
Search
  Advanced Search
 

Robert D Williams
Forage and Livestock Production Unit
Plant Physiologist

Phone: (405) 466-6123
Fax: (405) 466-6185
P.O. BOX 730
LANGSTON, OK, 73050-0000

Projects
SUSTAINABLE FORAGE PRODUCTION FOR LOW-INPUT FARMING SYSTEMS
Appropriated (D)
  Accession Number: 412838

Publications
Dispersal and post-dispersal predation of Italian ryegrass seed in unimproved pasture. - (Abstract)
Williams, R.D., Bartholomew, P.W. 2008. Dispersal and post-dispersal predation of Italian ryegrass seed in unimproved pasture. International Weed Science Congress. 297-298.
Seeding Cool-Season Grasses into Unimproved Warm-Season Pasture - (Peer Reviewed Journal)
Bartholomew, P.W., Williams, R.D. 2008. Seeding cool-season grasses into unimproved warm-season pasture. Grass and Forage Science. 63:94-106.
Soil bulk density and strength effects on seedling growth in annual ryegrass - (Abstract)
Bartholomew, P.W., Williams, R.D. 2007. Soil bulk density and strength effects on seedling growth in annual ryegrass. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. 2007 Industrial Annual Meetings Nov. 4-8, New Orleans, LA.
Insect seed predation as a factor in Italian ryegrass persistence - (Abstract)
Williams, R.D., Bartholomew, P.W. 2007. Insect seed predation as a factor in Italian ryegrass persistence. American Society of Agronomy Abstracts. 271-19.
Effect of cowpea and pea inocula on cool-season grasses. - (Peer Reviewed Journal)
Williams, R.D., Bartholomew, P.W. 2008. Effect of cowpea and pea inocula on cool-season grasses. Allelopathy Journal. 21(2):381-388.
Plant Growth Promoting Rhizobacteria and Mycorrhizal Fungi in Sustainable Agriculture and Forestry - (Book/Chapter)
Mallik, M.A.B. and Williams, R.D. 2008. Plant growth promoting rhizobacteria and mycorrhizal fungi in sustainable agriculture and forestry. In: Zeng, R.S., Mallik, A.U., Luo, S.M., editors. Allelopathy in Sustainable Agriculture and Forestry. New York: Springer. p. 321 -345.
Interaction of accelerated aging and p-coumaric acid on crimson clover seed germination. - (Other)
Williams, R.D., Bartholomew, P.W. 2007. Interaction of accelerated aging and p-coumaric acid on crimson clover seed germination.. Weed Science Society of America Meeting Abstracts.
Phytotoxicity of Mimosine and Albizziine on Seed Germination and Seedling Growth. - (Peer Reviewed Journal)
Williams, R.D., Hoagland, R.E. 2007. Phytotoxicity of mimosine and albizziine on seed germination and seedling growth of crops and weeds. Allelopathy Journal. 19(2):423-430
Interaction of Accelerated Aging and P-Coumaric Acid on Crimson Clover Seed Germination. - (Abstract)
Williams, R.D., Bartholomew, P.W. 2006. Interaction of accelerated aging and p-coumaric acid on crimson clover seed germination.. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting.
Effects of Exposure to below-Freezing Temperatures, Soil Moisture Content and Nitrogen Application on Phyllochron in Cool-Season Grasses - (Peer Reviewed Journal)
Bartholomew, P.W., Williams, R.D. 2006. Effects of exposure to below-freezing temperatures, soil moisture content and nitrogen application on phyllochron in cool-season grasses. Grass and Forage Science. 61:146-153.
Forage Residue Effects on Soil Temperatures and on Phyllochron in Overseeded Italian Ryegrass - (Abstract)
Bartholomew, P.W., Williams, R.D. 2005. Forage residue effects on soil temperatures and on phyllochron in overseeded Italian ryegrass [abstract]. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. Paper No. 4295.
Allelopathic Growth Stimulation of Plants and Microorganisms. - (Peer Reviewed Journal)
Malik, M., Williams, R.D. 2005. Allelopathic growth stimulation of plants and microorganisms. Allelopathy Journal 16(2):175-198.
Weed Control in Pigeon Pea - Wheat Cropping Rotation - (Peer Reviewed Journal)
Bidlack, J.E., Middick, A., Shantz, D.L., Mackown, C.T., Williams, R.D., Rao, S.C. 2006. Weed control in pigeon pea - wheat cropping rotation. Experimental Agriculture. p. 63-70.
The Effect of Harvest Management on Forage Production and Self-Reseeding Potential of Italian Ryegrass (Lolium Multiflorum L.) - (Proceedings/Symposium)
Bartholomew, P.W., Williams, R.D. 2005. The effect of harvest management on forage production and self-reseeding potential of Italian ryegrass (Lolium multiflorum L.)[abstract]. In: Milne, J.A., editor. Pastural Systems in Marginal Environments. Wageningen Academic Publishers, The Netherlands. p. 116.
Cool-Season Grass Development Response to Accumulated Temperature under a Range of Temperature Regimes - (Peer Reviewed Journal)
Bartholomew, P.W., Williams, R.D. 2005. Cool-season grass development response to accumulated temperature under a range of temperature regimes. Crop Science. 45:529-534.
Factors Affecting Italian Ryegrass (Lolium Multiflorum L.) Seed Distribution - (Abstract)
Williams, R.D., Bartholomew, P.W. 2005. Factors affecting Italian ryegrass (Lolium multiflorum L.) seed distribution [abstract]. In: Murphy, J.J., editor. Utilization of Grazed Grass in Temperate Animal Systems. Wageningen Academic Publishers, The Netherlands. p. 248.
Rhizobacteria Contribution to Sustainable Agriculture - (Abstract)
Mallik, M.A., Williams, R.D. 2005. Rhizobacteria contribution to sustainable agriculture [abstract]. In: Harper, J.D.I., An, M., Wu, H., Kent, J.H., editors. Proceedings of the International Allelopathy Society. 4th World Congress on Allelopathy, August 22-26, 2005, Wagga Wagga, Australia. p. 547.
Allelopathic Growth Stimulation of Plants and Microogranisms - (Abstract)
Mallik, M., Williams, R.D. 2005. Allelopathic growth stimulation of plants and microogranisms. Allelopathy Journal. 16(2): 175-198.
Seed Hydration-Dehydration in An Allelochemical (Coumarin) Alters Germination and Seedling Growth - (Peer Reviewed Journal)
Williams, R.D., Peal, L.K., Bartholomew, P.W. 2005. Seed hydration-dehydration in an allelochemical (coumarin) alters germination and seedling growth. Allelopathy Journal. 15(2):183-196.
Re-Establishment and Regrowth of Self-Seeded Italian Ryegrass - (Abstract)
Bartholomew, P.W., Williams, R.D. 2004. Re-establishment and regrowth of self-seeded Italian ryegrass [abstract]. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. Paper No. 5636.
Effects of Wetting/drying Cycles and Allelochemicals on Germination and Early Growth of Italian Ryegrass - (Abstract)
Majors, C.S., Holland, D.D., Bartholomew, P.W., Williams, R.D. 2004. Effects of wetting/drying cycles and allelochemicals on germination and early growth of Italian ryegrass [abstract]. Research Day Abstracts: Regional Universities Research Day. Paper No. S-201. p. 50.
Analysis of Historical Winter Wheat Yields in Oklahoma - (Abstract)
Williams, R.D., Bartholomew, P.W., Williams, C. 2004. Analysis of historical winter wheat yields in Oklahoma [abstract]. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. Paper No. 6269.
Effects of Wetting/drying Cycles, Moisture Potential on Germination and Early Seedling Growth - (Abstract)
Holland, D.D., Majors, C.S., Williams, R.D., Bartholomew, P.W. 2004. Effects of wetting/drying cycles, moisture potential on germination and early seedling growth [abstract]. Research Day Abstracts: Regional Universities Research Day. Paper No. S-201. p. 50.
Does An Aridity Index Explain the Historical Trends in Winter Wheat Yields? - (Abstract)
Williams, R.D., Bartholomew, P.W., Williams, C. 2004. Does an aridity index explain the historical trends in winter wheat yields [abstract]? Southern Section of the American Society of Agronomy Branch Meeting. Paper No. s-williams324918-poster. 2004 CDROM.
Soil Moisture Potential Affects Phyllochron in Cool-Season Grasses - (Abstract)
Bartholomew, P.W., Williams, R.D. 2004. Soil moisture potential affects phyllochron in cool-season grasses [abstract]. Southern Section of the American Society of Agronomy Branch Meeting. Paper No. s-bartholomew204960-poster. 2004 CDROM.
Simple Parametric Methods to Estimate Soil Water Retention and Hydraulic Conductivity - (Book/Chapter)
Timlin, D.J., Williams, R.D., Ahuja, L.R., Heathman, G.C. 2004. Simple parametric methods to estimate soil water retention and hydraulic conductivity. In: Development of Pedotransfer Functions in Soil Hydrology. Pachepsky, Y. and Rawls, W., editors. Amsterdam: Elsevier. 30:71-93.
Bioassays: Useful Tools for the Study of Allelopathy - (Book/Chapter)
Hoagland, R.E., Williams, R.D. 2003. Bioassays: Useful tools for the study of allelopathy. In: Macias, F.A., Galindo, J.C.G., Molinillo, J.M.G. and Cutler, H.G. editors. Allelopathy: Chemistry and Mode of Action of Allelochemicals. Boca Raton, FL: CRC Press. pp. 315-351.
Seed Deposition of Italian Ryegrass Affected by Forage Harvest Management - (Abstract)
Bartholomew, P.W., Williams, R.D. 2003. Seed deposition of Italian ryegrass affected by forage harvest management [abstract]. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. Abstract No. c06-bartholomew863018-poster.
Moisture Potential Affects Rate of Leaf Appearance in Italian Ryegrass and Tall Wheatgrass - (Abstract)
Terrell, N.C., Bartholomew, P.W., Williams, R.D. 2003. Moisture potential affects rate of leaf appearance in Italian ryegrass and tall wheatgrass [abstract]. Research Day Abstracts: Regional Universities Research Day. Paper No. S-354. p. 109.
Potential Wind Distribution of Italian Ryegrass Seed - (Abstract)
Williams, R.D., Bartholomew, P.W. 2003. Potential wind distribution of Italian ryegrass seed [abstract]. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. Paper No. c06-williams203285-poster. 2003 CDROM.
Seed Hydration-Dehydration in An Allelochemical Affects Seed Germination and Seedling Growth - (Abstract)
Peal, L.K., Williams, R.D., Bartholomew, P.W. 2003. Seed hydration-dehydration in an allelochemical affects seed germination and seedling growth. Proceedings of Southern Weed Science Society. v. 56. Abstract p. 335.
Comparison of Historical Weather Records to Determine Probabilities in Rainfall Events and Amounts - (Abstract)
KING, K.E., WILLIAMS, R.D., BARTHOLOMEW, P.W. COMPARISON OF HISTORICAL WEATHER RECORDS TO DETERMINE PROBABILITIES IN RAINFALL EVENTS AND AMOUNTS. SOUTHERN BRANCH OF AMERICAN SOCIETY OF AGRONOMY ABSTRACTS. 2003. Abstract p. 66.
Scaling and Estimating the Soil Water Characteristic Using a One-Parameter Model. - (Book/Chapter)
WILLIAMS, R.D., AHUJA, L.R. SCALING AND ESTIMATING THE SOIL WATER CHARACTERISTIC USING A ONE-PARAMETER MODEL. CRC PRESS, BOCA RATON, FL. SCALING METHODS IN SOIL PHYSICS. 2003. P. 35-40.
Preliminary Studies of Self-Seeding Warm-Season Legumes for Low-Input Forage Production - (Abstract)
BARTHOLOMEW, P.W., WILLIAMS, R.D. PRELIMINARY STUDIES OF SELF-SEEDING WARM-SEASON LEGUMES FOR LOW-INPUT FORAGE PRODUCTION. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2003. p. 67.
Temporal and Spatial Analysis of Soil Water Resources As a Decision Aid in Selecting Spring and Fall Planting Dates for Forages. - (Abstract)
WILLIAMS, R.D., BARTHOLOMEW, P.W. TEMPORAL AND SPATIAL ANALYSIS OF SOIL WATER RESOURCES AS A DECISION AID IN SELECTING SPRING AND FALL PLANTING DATES FOR FORAGES. CD-ROM. Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. 2003. Abstract No. A03-williams103721-Poster.
Does Seed Size Affect the Rate of Germination and Early Seedling Growth in Hairy Vetch? - (Abstract)
EKPO, J.I., BARTHOLOMEW, P.W., WILLIAMS, R.D. DOES SEED SIZE AFFECT THE RATE OF GERMINATION AND EARLY SEEDLING GROWTH IN HAIRY VETCH?. RESEARCH DAY ABSTRACTS: REGIONAL UNIVERSITIES RESEARCH DAY. 2002. P. 74.
Cool-Season Grass Development Response to Accumulated Temperature Following Variable Exposure to below-Freezing Temperatures - (Abstract)
BARTHOLOMEW, P.W., WILLIAMS, R.D. COOL-SEASON GRASS DEVELOPMENT RESPONSE TO ACCUMULATED TEMPERATURE FOLLOWING VARIABLE EXPOSURE TO BELOW-FREEZING TEMPERATURES. CD-ROM. AGRONOMY SOCIETY OF AMERICA, CROP SCIENCE SOCIETY OF AMERICA, SOIL SCIENCE SOCIETY OF AMERICA MEETING. 2002. (A03-bartholomew101028-Poster)
The Effects of Coumarin on Radish Seed Germination and Radicle Elongation - (Abstract)
PEAL, L., WILLIAMS, R.D. THE EFFECTS OF COUMARIN ON RADISH SEED GERMINATION AND RADICLE ELONGATION. RESEARCH DAY ABSTRACTS: REGIONAL UNIVERSITIES RESEARCH DAY. 2002. Abstract p. 74.

   
 
Last Modified: 05/14/2009
ARS Home | USDA.gov | Site Map | Policies and Links 
FOIA | Accessibility Statement | Privacy Policy | Nondiscrimination Statement | Information Quality | USA.gov | White House