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United States Department of Agriculture

Agricultural Research Service

Related Topics

James A Bradford (Jim)
Rangeland and Pasture Research
Plant Physiologist

Phone: (580) 256-7449
Fax: (580) 256-1322

2000 18TH ST
WOODWARD , OK 738015415


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Effect of bait delivery rate in a GreenFeed system on methane emission estimates from cattle grazing rangeland -
Vulnerability of crops and native grasses to summer drying in the U.S. Southern Great Plains Reprint Icon -
Yaseef, R., Billesbach, D., Fischer, M.L., Biraud, S.C., Gunter, S.A., Bradford, J.A., Torn, M.S. 2015. Vulnerability of crops and native grasses to summer drying in the U.S. Southern Great Plains. Agriculture, Ecosystems and Environment. 213:209-218.
Influence of sampling time on carbon dioxide and methane emissions by grazing cattle -
Gunter, S.A., Bradford, J.A. 2015. Influence of sampling time on carbon dioxide and methane emissions by grazing cattle. American Society of Animal Science Proceedings. 66:201-203.
Runoff and sediment responses to grazing native and introduced species on highly erodible Southern Great Plains soil. -
Wine, M., Zou, C., Bradford, J.A., Gunter, S.A. 2012. Runoff and sediment responses to grazing native and introduced species on highly erodible Southern Great Plains soil. Journal of Hydrology. 450-451:336-341.
Variability in light-use efficiency for gross primary productivity on Great Plains grasslands -
Polley, H.W., Phillips, B.L., Frank, A.B., Bradford, J.A., Sims, P.L., Morgan, J.A., Kiniry, J.R. 2011. Variability in light-use efficiency for gross primary productivity on Great Plains grasslands. 64th Annual Meeting of the Society for Range Management, February 2-10, 2011, Billings, Montana.
Variability in light-use efficiency for gross primary productivity on Great Plains grasslands -
Polley, H.W., Phillips, B.L., Frank, A.B., Bradford, J.A., Sims, P.L., Morgan, J.A., Kiniry, J.R. 2011. Variability in light-use efficiency for gross primary productivity on Great Plains grasslands. Ecosystems. 14:15-27.
Land conversion to bioenergy production: water budget and sediment output in a semiarid grassland -
Wine, M., Engle, D., Ochsner, T., Bradford, J.A. 2010. Land conversion to bioenergy production: water budget and sediment output in a semiarid grassland [abstract]. Proceedings of the Ecological Society of America Annual Meeting, August 1-6, 2010, Pittsburgh, Pennsylvania. PS 30-65.
Simulation of sandsage-bluestem forage growth under varying stocking rates -
Adiku, S.K., Dunn, G.H., Ahuja, L.R., Gunter, S.A., Bradford, J.A., Garcia, L., Andales, A.A. 2010. Simulation of sandsage-bluestem forage growth under varying stocking rates. Rangeland Ecology and Management. 63(5):546-552.
Precipitation regulates the response of net ecosystem CO2 exchange to environmental variation on U.S. rangelands Reprint Icon -
Polley, H.W., Emmerich, W., Bradford, J.A., Sims, P.L., Johnson, D.A., Saliendra, N.Z., Svejcar, T., Angell, R., Frank, A.B., Phillips, R.L., Snyder, K.A., Morgan, J.A., Sanabria, J., Mielnick, P.C., Dugas, W.A. 2010. Precipitation regulates the response of net ecosystem CO2 exchange to environmental variation on U.S. rangelands. Rangeland Ecology and Management. 63:176-186.
Effects of land use change from grassland and wheat to switchgrass in the Southern Great Plains -
Billesbach, D.P., Torn, M.S., Bradford, J.A., Gunter, S.A., Fisher, M.L., Zou, C. Effects of land use change from grassland and wheat to switchgrass in the Southern Great Plains. American Geophysical Union Fall Meeting. San Francisco, CA 14-18 December 2009. (Abstract)
Carbon and Water cycling in Southern Great Plains ecosystems converted to switchgrass production -
Billesbach, D.P., Torn, M.S., Bradford, J.A., Gunter, S.A., Fischer, M.L., Zou, C. 2009. Carbon and Water cycling in Southern Great Plains ecosystems converted to switchgrass production. Ameriflux Annual Principle Investigators Workshop. Washington, DC. September 21-23, 2009. (Abstract)
Physiological and environmental regulation of interannual variability in CO2 exchange on rangelands in the western United States Reprint Icon -
Polley, H.W., Emmerich, W., Bradford, J.A., Sims, P.L., Johnson, D.A., Saliendra, N.Z., Svejcar, T., Angell, R., Frank, A.B., Phillips, R.L., Snyder, K.A., Morgan, J.A. 2010. Physiological and environmental regulation of interannual variability in CO2 exchange on rangelands in the western United States. Global Change Biology. 16:990-1002.
Precipitation regulates the response of net ecosystem CO2 exchange to environmental variation on U.S. rangelands -
Polley, H.W., Emmerich, W.E., Bradford, J.A., Sims, P.L., Johnson, D.A., Saliendra, N.Z., Svejcar, A.J., Angell, R.F., Frank, A.B., Phillips, B.L., Snyder, K.A., Morgan, J.A., Sanabria, J., Mielnick, P.C., Dugas, W.A. 2009. Precipitation regulates the response of net ecosystem CO2 exchange to environmental variation on U.S. rangelands. In: Proceedings of the Ecological Society of America, August 2-7, 2009, Albuquerque, New Mexico. 2009 CDROM.
Effects of N fertilization and supplementation strategies on forage intake, dietary selection, and performance of growing beef cattle. -
Gunter, S.A., Springer, T.L., Bradford, J.A. 2009. Effects of N fertilization and supplementation strategies on forage intake, dietary selection, and performance of growing beef cattle. Journal of Animal Science 87 (E-Supplement 2):320. (Abstract)
Climatic regulation of seasonal and inter-annual variability in net ecosystem exchange of CO2 on rangelands -
Polley, H.W., Emmerich, W.E., Bradford, J.A., Johnson, D.A., Svejcar, A.J., Angell, R.F., Phillips, B.L., Snyder, K.A., Morgan, J.A. 2009. Climatic regulation of seasonal and inter-annual variability in net ecosystem exchange of CO2 on rangelands. In: Proceedings of the Society for Range Management, February 8-12, 2009, Albuquerque, New Mexico. 2009 CDROM.
Seasonal and inter-annual variability in rangeland NEE: Contributions of climatic anomalies and fluctuations in daytime and night-time CO2 fluxes -
Polley, H.W., Emmerich, W.E., Bradford, J.A., Sims, P.L., Johnson, D.A., Saliendra, N.Z., Svejcar, A.J., Angell, R.F., Frank, A.B., Phillips, B.L., Snyder, K.A., Morgan, J.A. 2008. Seasonal and inter-annual variability in rangeland NEE: Contributions of climatic anomalies and fluctuations in daytime and night-time CO2 fluxes. In: Proceedings of the Ecological Society of America, August 3-8, 2008, Milwaukee, Wisconsin. 2008 CDROM.
CARBON FLUXES ON NORTH AMERICAN RANGELANDS -
Svejcar, A.J., Angell, R.F., Bradford, J., Dugas, W., Emmerich, W.E., Frank, A.B., Gilmanov, T., Haferkamp, M.R., Johnson, D.A., Mayeux Jr, H.S., Mielnick, P., Morgan, J.A., Saliendra, N., Schuman, G.E., Sims, P.L., Snyder, K.A. 2008. Carbon fluxes on north american rangelands. Rangeland Ecology and Management. 61:465-474.
MODERATE AND HEAVY GRAZING IMPACTS ON CARBON FLUX IN A SOUTHERN PLAINS MIXED-GRASS PRAIRIE -
Sims, P.L., Bradford, J.A. 2006. Moderate and heavy grazing impacts on carbon flux in a southern plains mixed-grass prairie [abstract]. Society for Range Management 59th Annual Meeting, February 5-11, 2005, Vancouver, Canada, Abstract No. 334. p. 219. 2006 CDROM.
MANAGING GRASSLAND AS A CO2 SINK -
Morgan, J.A., Baron, V.S., Bradford, J.A., Haferkamp, M.R., Sims, P.L., Skinner, H. 2005. Managing grassland as a co2 sink. ASA-CSSA-SSSA Annual Meeting Abstracts.
QUANTIFICATION OF CO2 EXCHANGE IN GRASSLAND ECOSYSTEMS OF THE WORLD USING TOWER MEASUREMENTS, MODELING AND REMOTE SENSING 1653 -
Gilmanov, T.G., Demment, M.W., Wylie, B.K., Laca, E.A., Akshalov, K., Baldocchi, D.D., Belelli, L., Bradford, J.A., Coulter, R.L., Dugas, W.A., Emmerich, W.E., Flanagan, L.B., Frank, A.B., Haferkamp, M.R., Johnson, D.A., Meyers, T.P., Morgan, J.A., Nasyrov, M., Owensby, C.E., Pekour, M.S., Pilegaard, K., Saliendra, N.Z., Sanz, M.J., Sims, P.L., Soussana, J.F., Tieszen, L.L., Verma, S.B. 2005. Quantification of co2 exchange in grassland ecosystems of the world using tower measurements, modeling and remote sensing. In: Proceedings of the 20th International Grassland Congress. June 26 - July 1, 2005, University College, Dublin Ireland. p. 587.
CARBON DIOXIDE AND EVAPOTRANSPIRATION FLUXES ACROSS GRASSLAND AND SAND SAGEBRUSH DOMINATED MIXED PRAIRIE -
Sims, P.L., Bradford, J.A. 2004. Carbon dioxide and evapotranspiration fluxes across grassland and sand sagebrush dominated mixed prairie [abstract]. Wildland Shrub Symposium. p. 60.
GROSS PRIMARY PRODUCTION AND LIGHT RESPONSE PARAMETERS OF FOUR SOUTHERN PLAINS ECOSYSTEMS ESTIMATED USING LONG-TERM CO2-FLUX TOWER MEASUREMENTS -
Gilmanov, T.G., Verma, S.B., Sims, P.L., Meyers, T.P., Bradford, J.A., Burba, G.G., Suyker, A.E. 2003. Gross primary production and light response parameters of four southern plains ecosystems estimated using long-term co2-flux tower measurements. Global Biogeochemical Cycles. 17(2)1071. p. 40-1 to 40-16.
EVAPOTRANSPIRATION IN SOUTHERN PLAINS MIXED-GRASS PRAIRIES -
SIMS, P.L., BRADFORD, J.A. 2003. EVAPOTRANSPIRATION IN SOUTHERN PLAINS MIXED-GRASS PRAIRIES. INTERNATIONAL RANGELAND CONGRESS. pp. 1094-1096.
CHARACTERIZATION OF THE CARBON STORAGE POTENTIAL OF U.S. RANGELANDS WITH LONG-TERM CO2 FLUX MEASUREMENTS -
SVEJCAR, A.J., MAYEUX JR, H.S., JOHNSON, D.A., FRANK, A.B., GILMANOV, T., ANGELL, R.F., MORGAN, J.A., SIMS, P.L., BRADFORD, J.A., SALIENDRA, N.Z., EMMERICH, W.E., SCHUMAN, G.E., HAFERKAMP, M.R., MITCHELL, K. CHARACTERIZATION OF THE CARBON STORAGE POTENTIAL OF U.S. RANGELANDS WITH LONG-TERM CO2 FLUX MEASUREMENTS. SOCIETY FOR RANGE MANAGEMENT MEETING ABSTRACTS. 2003. V. 56.
THE ARS RANGELANDS CO2 FLUX NETWORK: DO RANGELANDS SEQUESTER CARBON? -
Mayeux, H.S., Dugas, B., Svejcar, A.J., Angell, R.F., Johnson, D.A., Frank, A.B., Emmerich, W.E., Morgan, J.A., Sims, P.L., Bradford, J.A. 2003. The ARS rangelands CO2 flux network: Do rangelands sequester carbon? Proceedings of the 7th International Rangeland Congress. p. 1083-1084.
THE USDA-ARS CO2 FLUX NETWORK: VARIATION IN RANGELAND CO2 FLUX ACROSS YEARS AND ECOSYSTEMS -
THE USDA-ARS CO2 FLUX NETWORK: VARIATION IN RANGELAND CO2 FLUX ACROSS YEARS AND ECOSYSTEMS -
SVEJCAR, A.J., DUGAS, W., MAYEUX JR, H.S., JOHNSON, D.A., FRANK, A.B., GILMANOV, T.G., ANGELL, R.F., MORGAN, J.A., SIMS, P.L., BRADFORD, J.A. THE USDA-ARS CO2 FLUX NETWORK: VARIATION IN RANGELAND CO2 FLUX ACROSS YEARS AND ECOSYSTEMS. AGRICULTURAL AND FOREST METEOROLOGY. 2002. P. 37-38.
CARBON DIOXIDE FLUXES IN A SOUTHERN MIXED GRASS PRAIRIE -
CARBON DIOXIDE FLUXES OVER THREE GREAT PLAINS GRASSLANDS. -
SOIL NITROGEN AND VEGETATION ON SANDHILL RANGELAND AFTER 50 YEARS OF CATTLE GRAZING OR EXCLUSION -
Last Modified: 5/2/2016
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