Jason Warren, Ph.D.

Associate Professor
Plant and Soil Sciences
Soil and Water Conservation/Management Extension Specialist 



Warren’s research interests are the evaluation of soil carbon sequestration under bioenergy feedstock production systems.  This research is aimed at improving estimates of the net greenhouse gas emissions offsets provided by bioenergy production systems.

“The production of biomass for the refineries will dramatically alter the land use in Oklahoma through the conversion of lands to biomass production; we must ensure that this conversion results in a sustainable system.”

Key Publications

Penn, C.J. Penn, and J.G. Warren. 2008. Investigating phosphorus sorption onto kaolinite using isothermal titration calorimetry. Soil Sci. Soc. Am. J. In Press.

Sistani, K.R., H.A. Torbert, T.R. Way, C.H. Bolster, J.W. Warren, D.H. Pote. 2008. Broiler litter application method and runoff timing effects on nutrient and E. coli losses from tall fescue pasture. J. Environ. Qual. In Press.

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.