DEGREES:

• B.S., Agronomy, University of Wisconsin-River Falls, 1971
  
• M.S., Crop Physiology, University of Arizona, 1973
  
• PhD., Crop Physiology, University of Missouri, 1976

Crop physiology; crop development and growth; nitrogen, tillage, and residue management interactions with crop growth.

Developing crop and soil management practices that improve efficiency of nitrogen use and crop yield through application of new knowledge of crop development, crop response to nitrogen availability, and management of crop residues.

• Russelle, M.P., Wilhelm, W.W., Olson, R.A., and Power, J.F. Growth analysis based on degree days. Crop Sci. 24:28-32. 1984.

• Wilhelm, W.W., Doran, J.W., and Power, J.F. Corn and soybean yield response to crop residue management under no-tillage production systems. Agron. J. 78:184-189. 1986.

• Wilhelm, W.W., Schepers, J.S., Mielke, L.N., Doran, J.W., Ellis, J.R., and Stroup, W.W. Dryland maize development and yield resulting from tillage and nitrogen fertilization practices. Soil Tillage Res. 10:167-179. 1987.

• Wilhelm, W.W., Bouzerzour, H., and Power, J.F. Soil disturbance-residue management effect on winter wheat growth and yield. Agron. J. 81:581-588. 1989.

• Wilhelm, W.W., McMaster, G.S., Rickman, R.W., and Klepper, Betty. Above-ground vegetative development and growth of winter wheat as influenced by nitrogen and water availability. Ecol. Modelling. 68:183-203. 1993.

• McMaster, Gregory S., Wilhelm, W.W., and Bartling, P.N.S. Winter wheat yield, yield components, and culm contribution response to irrigation. Crop Sci. 34:1123-1127. 1994.

• Studdert, G.A., Wilhelm, W.W., and Power, J.F. Imbibition response of winter wheat to water-filled pore space. Agron. J. 86:995-1000. 1994.

• McMaster, Gregory S., and Wilhelm, W.W. Accuracy of equations predicting the phyllochron of wheat. Crop Sci. 35:30-36. 1995.

• Wilhelm, W.W., and Johnson, B.E. Nitrogen fertilizer management for hybrid seed production fields. p 189-205. In Proc. Corn and Sorghum Res. Conf., 52th, Chicago, IL, 10-11 Dec 1997. Am. Seed Trade Assoc., Washington, DC. 1998.

• Wilhelm, W.W., Liebig, M., Varvel, G.E., and Blackmer, T.M. Impact of crop rotation, hybrid, and N fertilizer rate on mid-season stalk breakage in corn. Agron. J. 91:160-165. 1999.

• Wilhelm, W.W., Johnson, J.M.F., Hatfield, J.L., Voorhees, Ward, and Linden, D.R. Crop and soil productivity response to corn residue removal: A literature review. Agron. J. 96:1-17. 2004.
• Wilhelm, W.W., and Wortmann, C.S. Tillage and rotation interactions for corn and soybean grain yield as affected by precipitation and air temperature. Agron. J. 96:000-000. 2004. (in press)