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United States Department of Agriculture

Agricultural Research Service

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

Phone: (580) 256-7449
Fax: (580) 256-1322
2000 18TH ST
WOODWARD, OK, 73801-5415


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Runoff and sediment responses to grazing native and introduced species on highly erodible Southern Great Plains soil. - (Peer Reviewed Journal)
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 - (Abstract Only)
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 - (Peer Reviewed Journal)
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 - (Abstract Only)
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 - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (Abstract Only)
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 - (Abstract Only)
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 - (Peer Reviewed Journal)
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 - (Abstract Only)
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. - (Abstract Only)
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 - (Abstract Only)
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 - (Abstract Only)
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 - (Peer Reviewed Journal)
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 - (Abstract Only)
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 - (Proceedings)
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 - (Proceedings)
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 - (Abstract Only)
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 - (Peer Reviewed Journal)
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 - (Proceedings)
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 - (Abstract Only)
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? - (Abstract Only)
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 - (Proceedings) - (01-Jul-02)
The USDA-ARS Co2 Flux Network: Variation in Rangeland Co2 Flux Across Years and Ecosystems - (Proceedings)
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 - (Peer Reviewed Journal) - (11-May-01)
Carbon Dioxide Fluxes over Three Great Plains Grasslands. - (Book / Chapter) - (10-Feb-00)
Soil Nitrogen and Vegetation on Sandhill Rangeland after 50 Years of Cattle Grazing Or Exclusion - (Peer Reviewed Journal) - (17-Nov-96)
Last Modified: 9/23/2014
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