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United States Department of Agriculture

Agricultural Research Service

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John D Williams


John Williams

Educational Background:

I completed my BA in biology in 1986 and my MS in rangeland resources in 1988 at Oregon State University. I completed my PhD in range science at Utah State University in 1993.

Research Program: Hydrology

Hydrology and soil conservation in dry-land crop and biofuel production systems.

Current Research Projects:

  • Identify the optimal timing for creation of a reduced tillage fallow mulch in the lower precipitation (<350 mm) winter wheat-fallow region and determine if it can be predicted using soil water, temperature, or weather forecasts, and if it is different from the timing farmer already use.
  • Predict where early seeding is not necessary from maps of growing degree days following fall precipitation.
  • Determine the effect of crop sequences with oil seed crops on overwinter infiltration, rain capture, and soil water storage for spring crops.
  • Calibrate and use the SWAT model to determine potential changes in crop productivity, hydrology, and sediment loads resulting from a shift from conventional to diverse cropping systems.

Other Research Interests:

  • Biofuel production potential of perennial riparian buffers in agricultural landscapes
    Federal conservation programs have the potential to provide conservation services and crops bioenergy, particularly where conservation buffers are installed. I recently completed research evaluating the potential of using conservation buffers as sources of lignocellulosic feedstocks for biofuels. Much of the riparian area formally incorporated into crop production on the Columbia Plateau are has been enrolled in conservation buffer programs. These areas are intrinsically productive, if not specifically for small grain production. The data from this project demonstrates the productivity of perennial species used in conservation buffers and the opportunity to diversify wheat-based cropping systems while providing biomass for energy production and/or forage.


View PDFWilliams, J.D., S.B. Wuest, and D.S. Long. Soil and Water Conservation in the Pacific Northwest Through No-tillage and Intensified Crop Rotations. Journal of Soil and Water Conservation. 69(6): 495-504. 2014.
View PDFWilliams, J.D., and S.B. Wuest. Soil Water Dynamics in Continuous Winter Wheat Grown in the Semiarid Pacific Northwest, U.S.A. Soil Science Society of America Journal. 78(2): 571-578. 2014.
View PDFWilliams, J.D., McCool, D.K., Reardon, C.L., Douglas, C.L., Jr., Albrecht, S.L., and Rickman, R. W. Root:shoot ratios and belowground biomass distribution for Pacific Northwest dryland crops. Journal of Soil and Water Conservation. 68(5): 349-360. 2013.
Williams, J.D., S.B. Wuest, D.S. Long. Soil and water conservation in the Pacific Northwest through no-tillage and intensified crop rotations. Journal Soil & Water Conservation. Accepted 14 December 2013
View PDFDeepak, K., Juneja, A., Hohenschuh, W.E., Williams, J.D., Murthy, G. Chemical composition and bioethanol potential of different plant species found in Pacific Northwest conservation buffers. Journal of Renewable and Sustainable Energy. 4(6). 2012
View PDFWilliams, J.D., Long, D.S., Wuest, S.B. Capture of plateau runoff by global positioning system-guided drill seed operation. Journal of Soil and Water Conservation. 66(6): 355-361. 2011.
View PDFWilliams, J.D., Hartman, H.M., Spencer, L.M., Loiland, J.O. Plant community development in a dryland CREP in Northeastern Oregon. American Journal of Plant Science. 2(6): 744-752. 2011.
View PDFJuneja, A., Kumar, D., Williams, J.D., Wysocki, D.J., Murthy, G.S. Potential for ethanol production from conservation reserve program lands in Oregon. Journal of Renewable and Sustainable Energy. 3(6). 2011.
View PDFWilliams, J.D., Wuest, S.B. Tillage and no-tillage conservation effectiveness in the intermediate precipitation zone of the inland Pacific Northwest, United States. Journal Soil and Water Conservation. 66(4): 242-249. 2011.
View PDFWilliams, J.D., Long, D.S. Intensive crop rotation yield and economic performance in minimum tillage and no tillage in Northeastern Oregon. Crop Management 10. DOI 10.1094/cm-2011-0328-01-rs. 2011.
View PDFWilliams, J.D., Dun, S., Robertson, D.S., Wu, J.Q., Brooks, E., Flanagan, D.C., McCool, D.K. WEPP simulations of dryland cropping systems in small drainages of northeastern Oregon. Journal of Soil and Water Conservation. 65(1):22-33. 2010
View PDFWilliams, J.D., Gollany, H.T., Siemens, M.C., Wuest, S.B., Long, D.S. Comparison of runoff, soil erosion, and winter wheat yields from no-till and inversion tillage production systems in northeastern Oregon. Journal Soil and Water Conservation. 64(1):42-53. 2009.
View PDFWilliams, J.D. Soil erosion from dryland winter wheat-fallow in a long-term residue and nutrient management experiment in north-central Oregon. Journal Soil and Water Conservation. 63(2): 53-59. 2008.
View PDFWuest, S.B., Williams, J.D., Gollany, H.T. Tillage and perennial grass effects on ponded infiltration for seven semi-arid loess soils. Journal of Soil and Water Conservation. 61(4): 218-223. 2006.
View PDFWilliams, J.D., Wuest, S.B., Schillinger, W.F., Gollany, H.T. Rotary subsoiling newly planted winter wheat fields to improve infiltration in frozen soil. Soil and Tillage Research. 86 (1): 141-151. 2006.
View PDFWilliams, J.D., Kolpin, D.W. Current topics in agricultural hydrology and water quality: introduction. Journal of the American Water Resources Association. 41(2): 243-244. 2005.
View PDFWuest, S.B., Caesar, T., Wright, S.E., Williams, J.D. Organic matter addition, N, and residue burning effects on infiltration, biological, and physical properties of an intensively tilled silt-loam soil. Soil and Tillage Research 84(1): 154-167. 2005.
View PDFWilliams, J.D. Effects of long-term winter wheat, summer fallow residue and nutrient management on field hydrology for a silt loam, north-central Oregon. Soil and Tillage Research. 75(1): 109-119. 2004.
Gollany, H.T., Wuest, S.B., Williams, J.D., Schillinger, W.F., Baker, A.A., Robertson, D.A. Subsoiling influence on nutrients in runoff following rainfall simulationIn Proceedings of ASA-SSSA. 2003.
View PDFWilliams, J.D., Wilkins, D.E., Douglas, Jr., C.L., and Rickman, R.W. Mow-plow crop residue management influence on soil erosion in north-central Oregon. Soil and Tillage Research 55: 71-78. 2000.
View PDFWilliams, J.D., Loiland, J.O., Camara, K.M., and Williams, H.B. North-central Oregon dryland crop riparian conservation project. In Proceedings of American Water Resources Association 2000 Summer Specialty Summer Conference, International Conference on Riparian Ecology and Management in Multi-Land Use Watersheds, 28 - 31 August 2000. Portland, OR. 405-409 pp. 2000.
View PDFWilliams, J.D., Dobrowolski, J.P, and West, N.E. Microbiotic crust influence on unsaturated hydraulic conductivity. Arid Soil Research and Rehabilitation 12(2). 145-154. 1999.
View PDFWilliams, J.D., Wilkins, D.E., McCool, D.K., Baarstad, L.L., Klepper, B.L., and Papendick, R.I. A new rainfall simulator for use in low-energy rainfall areas. Applied Engineering in Agriculture 14(3): 243-247. 1998.
View PDFWilliams, J.D., Dobrowolski, J.P, and West, N.E. Microphytic crust influence on interrill erosion and infiltration capacity. Transactions of the American Society of Agricultural Engineers 38(1): 139-146. 1995.
View PDFWilliams, J.D., Dobrowolski, J.P, West, N.E., and Gillette, D.A. Microphytic crust influence on wind erosion. Transactions of the American Society of Agricultural Engineers 38(1): 131-137. 1995.
View PDFWilliams, J.D. Microbiotic Crusts: A Review. Prepared for: Interior Columbia Basin Management Project, 112 Poplar Street, Walla Walla WA 99362-1693. USDA-FS/USDI-BLM, Contract No. 43-0E00-4-9141. 56 pp. 1994.
View PDFWilliams, J.D., and Buckhouse, J.C. Winter logging and erosion in a ponderosa pine forest in northeastern Oregon. Western Journal of Applied Forestry 8(1): 19-23. 1993.
View PDFWilliams, J.D., and Buckhouse, J.C. Surface runoff plot design for use in watershed research. Journal of Range Management. 44(4): 411-412. 1991.

Last Modified: 8/12/2016
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