Jason Warren

Associate Professor

Department of Plant and Soil Sciences
373 Ag Hall
Stillwater, OK 74078
(405) 744-1721

Dr. Warren's research and extension program focuses on soil conservation management practices in no-till cropping systems, with the goal of reducing environmental impacts of agricultural land management while maintaining or increasing economic viability.

Dr. Warren provides leadership for a multidisciplinary team of agronomists and crop production extension specialists to help producers realize benefits of no-till management resulting from increased soil moisture conservation. Dr. Warren's team also evaluates cropping systems management and irrigation strategies to maximize grain production under limited irrigation including subsurface drip irrigation, with a particular focus on grain sorghum.

On his participation with the Ogallala Water Coordinated Agriculture Project, Dr. Warren says: "I would like to see a collaborated effort to help producers adopt appropriate combinations of high efficiency irrigation systems, irrigation scheduling tools, crop rotations, and crop management practices to optimize the economic productivity of irrigation water in the Ogallala region."

Selected Publications

Whitaker, A., C. Penn, and J. Warren. 2016. Surface application of a saline-sodic oil and gas drilling waste to winter wheat (Triticum aestivum L.). Geoderma. 274:97-103.

Konemann, C.E., B.M. Kard, M.E. Payton, S.P. Deng, J.G. Warren, and T.M. Wilson. 2016. CO2 emissions from soil on Oklahomas tallgrass prairie preserve in the presence or absence of termites (Isoptera: Rhinotermitidae). Am. Midl. Nat. 176(1):60-71.

Wilson, T.M., and J.G. Warren. 2015. Bulk Density and Carbon Concentration Variance Influence on Soil Carbon Stock Measurements. Comm. in Soil and Plant Anal. 46:2342-2356.

Wilson, T.M., B. McGowen, J. Mullock, D.B. Arnall, and J.G. Warren. 2015. Nitrous Oxide Emissions from Continuous Winter Wheat in the Southern Great Plains. Agronomy J. 107:1878–1884

Penn, C.J., A.H. Whitaker, and J.G. Warren. 2014. Surface application of oil-based drilling mud mixed with gypsum, limestone, and Caliche. Agronomy J. 106:1859-1866.

Yiman, Y.T., T.E. Ochsner, V.G. Kakani, and J.G. Warren. 2014. Soil water dynamics and evapotranspiration under annual and perennial bioengery crops. Soil. Sci. Soc. Am. J. 78:1584-1593.

Stoner, D., C. Penn, J. McGrath, J. Warren. 2012. Phosphorus removal with by-products in a flow-through setting. J. Environ. Qual. 117:28-33.

Thomason, W., S.B. Phillips, and J.G. Warren. 2012. Winter hulless barley response to nitrogen rate and timing and foliar phosphorus. J. Plant Nut. 35-2:225-234.

Abreu, S., C.B. Godsey, J.T. Edwards, and J.G. Warren. 2011. Assessing Carbon and Nitrogen Stocks of No-till Systems in Oklahoma. Soil & Tillage Research. 117:28-33.

Thomason, W.E., S.B. Phillips, P.H. Davis, J.G. Warren, M.M. Alley, M.S. Reiter. 2011. Variable nitrogen rate determination from plant spectral reflectance in soft red winter wheat. Precision Agri. 1:1-16.

Penn, C.J., J. Vitale, S. Fine, J. Payne, J.G. Warren, H. Zhang, M. Eastman, S.L. Herron. 2011. Alternative poultry litter storage for improved transportation and use as a soil amendment. J. Environ. Qual. 40:233-241.

Sistani, K.R., M.M. Mikha, J.G. Warren, B. Gilfillen, J. Acosta-Martinez, and W.T. Willian. 2010. Nutrient source and tillage impact on corn grain yield and soil properties. Soil Sci. 175:593-600.

Turner, J.C., J.A. Hattey, J.G. Warren, and C.J. Penn. 2010. Electrical Conductivity and Sodium Adsorption Ratio Changes Following Annual Applications of Animal Manure Amendments. Comm. Soil Sci. Plant Anal. 41:1043-1060.

Lovanh, N., J. Warren, and K. Sistani. 2010. Determination of ammonia and greenhouse gas emissions from land application of swine slurry: a Comparison of three application methods. Bioresource Tech. 101:1662-1667.

Penn, C.J., J.G. Warren, and S. Smith. 2010. Maximizing ammonia-nitrogen removal from solutions using different zeolites. J. Environ. Qual. 39:1478-1485.

Rothrock, M.J., K.L. Cook, J.G. Warren, M.A. Eiteman and K. Sistani. 2010. Microbial mineralization of organic nitrogen forms in poultry litters. J. Environ. Qual. 39:1848-1857.

Sistani, K.R., J.G. Warren, N. Lavahn, S. Higgins, and S. Shearer. 2010. Quantification of Greenhouse Gas Emissions from Soil Applied Swine Effluent by Different Methods. Soil Sci. Soc. Am. J. 74:429-435.

Penn, C.J., and J.G. Warren. 2009. Investigating phosphorus sorption onto kaolinite using isothermal titration calorimetry. Soil Sci. Soc. Am. J. 73:560-568.

Sistani, K.R., H.A. Torbert, T.R. Way, C.H. Bolster, D.H. Pote, and J.G. Warren. 2009. Broiler litter application method and runoff timing effects on nutrient and E. coli losses from tall fescue pasture. J. Environ. Qual. 38:1-8.

Warren, J.G., K.S. Sistani, T.R. Way, D.A. Mays, and D.H. Pote. 2008. A new method of poultry litter application to perennial pasture: subsurface banding. Soil Sci. Soc. Am. J. 72: 1832-1837.

Cook, K.L., M.J. Rothrock, Jr., J.G. Warren, K.R. Sistani, and P.A. Moore, Jr. 2008. Effect of alum treatment on the concentration of total and ureolytic microorganisms in poultry litter. J. Environ. Qual. 37:2360-2367.

Warren, J.G., S.B. Phillips, and G.L. Mullins. 2008. Impact of soil type and application rate on the availability of P applied as alum-treated poultry litter. Comm. Soil Sci. Plant Anal. 39:2515-2533.

Rothrock Jr., M.J., K.L. Cook, J.G. Warren, and K.R. Sistani. 2008. The effect of alum addition on microbial communities in poultry litter. Poultry Sci. 87:1493-1503

Rothrock, M. J. Jr., K.L. Cook, N. Lovanh, J. Warren, and K. Sistani. 2008. Development of a quantitative real-time polymerase chain reaction assay to target a novel group of ammonia-producing bacteria found in poultry litter. Poultry Sci. 87:1058-1067.

Warren, J.G., C.J. Penn, J. McGrath, and K. Sistani. 2008. The impact of alum addition on organic P transformations in poultry litter and litter amended soil. J. Environ. Qual. 37:469-476.

Warren, J.G., S.B. Phillips, G.L. Mullins, and L.W. Zelazny. 2006. Impact of alum-treated poultry litter applications on fescue production and soil phosphorous fractions. Soil Sci. Soc. Am. J. 70:1957-1966.

Warren, J.G., J.A. Hattey, J.C. Turner, and S.B. Phillips. 2006. Comparison of two micrometeorological methods to determine ammonia volatilization from lagoon swine effluent. Comm. Soil Sci. Plant Anal. 37:1339-1356.

Warren, J.G., S.B. Phillips, G.L. Mullins, D.A. Keahey, and C.J. Penn. 2006. Environmental and production consequences of using alum-amended poultry litter as a nutrient source for corn. J. Environ. Qual. 35: 172-182.

Phillips, S.B., J.G. Warren, and G.L. Mullins. 2005. Nitrogen rate and application timing affect Beauregard sweet potato yield and quality. HortScience 40: 214-217.

Phillips, S.B., D.A. Keahey, J.G. Warren, and G.L. Mullins. 2004. Estimating winter wheat tiller density using spectral reflectance sensors for early-spring, variable-rate nitrogen applications. Agron. J. 96:591-600.

Penn, C.J., G.L. Mullins, L.W. Zelazny, J.G. Warren, and J.M. McGrath. 2004. Surface runoff losses of phosphorus from Virginia soils amended with turkey manure using phytase and high available phosphorus corn diets. J. Environ. Qual. 33:1431-1439.

Wu, J., D.L. Nofziger, J. Warren, and J. Hattey. 2003. Estimating ammonia volatilization from swine-effluent droplets in sprinkle irrigation. Soil Sci. Soc. of Am. J. 67:1352-1360.

Wu, J., D.L. Nofziger, J.G. Warren, and J.A. Hattey. 2003. Modeling ammonia volatilization from surface-applied swine effluent. Soil Sci. Soc. of Am. J. 67:1-11.

Dubeux, J., J. Warren, and A. Franzluebbers. 2016. Grazing cover crops in cropland. A Southern Cover Crops 2016 Conference Factsheet. Southern SARE. University of Georgia, Athens, GA.

Edwards, J., F. Epplin, B. Hunger, A. Post, T. Royer, R. Taylor, J. Warren, H. Zhang. 2015. No-till Wheat Production in Oklahoma. PSS-2132. Oklahoma State University, Stillwater. Feb.

Warren, J., R. Taylor, and J. Edwards. 2014. Types of on-farm demonstrations. PSS-2915. Oklahoma State University, Stillwater. Dec.

Penn, C., and J. Warren. 2014. Application of water-based drilling mud to winter wheat: impact of application on yield and soil properties. CR-2272. Oklahoma State University, Stillwater. Nov.

Warren, J., and R. Taylor. 2014. Managing Soil Compaction. PSS-2244. Oklahoma State University, Stillwater. Sept.

Boman, R., and J. Warren. 2014. Understanding Cotton Irrigation Requirements in Oklahoma. PSS-2406. Oklahoma State University, Stillwater. Mar.

Warren, J., T. Wilson, J. Edwards. 2014. Using Sunn Hemp as a Cover Crop in Oklahoma. PSS-2273. Oklahoma State University, Stillwater. Mar.

Warren, J., K. Meeks, J. Edwards. 2013. Benefits of Using Cover Crops in Oklahoma No-Till. PSS-2161. Oklahoma State University, Stillwater. July.

Wilson, T.M., J. Warren, and B. Arnall. 2013. Nitrous Oxide Emissions from Soil. PSS-2269. Oklahoma State University, Stillwater, OK. Jan.

Penn, C., J. Vitale, J. Payne, J. Warren, and H. Zhang. 2012. An alternative poultry litter storage technique for improved handling, transport, and application: the mass reduction system PSS-2268. Oklahoma State University, Stillwater, OK. Jan.

Warren, J., and C. Godsey. 2011. Relationships between soil profile characteristics and soybean yields in 2010. In The Soybean Research at OSU 2011 Report. P-1034. Oklahoma State University, Stillwater, OK. Dec.

Cumbie, A., J.G. Warren, B. Arnall. 2011. Organic matter in no-till production systems. PSS-2267. Oklahoma State University, Stillwater, OK. Dec.

Warren, J. 2010. Raindrops and bombs: the erosion process. PSS-2252 Oklahoma Cooperative Extension Service, Oklahoma State University, Stillwater, OK. Dec.

Warren, J., and C. Godsey. 2010. Summary of the soil carbon sequestration assessment program. CR-2265. Oklahoma Cooperative Extension Service, Oklahoma State University, Stillwater, OK. Oct.

Edwards, J., J. Warren, D. Redfearn. 2009. Sod-seeded small grains into bermudagrasspastures. PSS-2071. Oklahoma Cooperative Extension Service, Oklahoma State University, Stillwater, OK. Apr.

Warren, J.G., T.E. Ochsner, and C.B. Godsey. 2009. Fate of precipitation falling on Oklahoma cropland. PSS-2140. Oklahoma Cooperative Extension Service, Oklahoma State University, Stillwater, OK. Mar.

Phillips, S.B., J.G. Warren, D.A. Keahey, and G.L. Mullins. 2004. Nitrogen management for white potato production. Virginia Coop. Extension Serv. Publication number 438-012.

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