My research program is focused on the plant root-soil interface. My objective is to determine how roots and rhizosphere processes can be managed to improve efficiency of nutrient use and minimize environmental pollution. My work has involved collection and analysis of rhizosphere products and the study of root-mediated mechanisms of enhanced nutrient acquisition. I am also attempting to measure soil quality indicators for a number of different cropping system comparisons.

B.A., Anthropology, Grinnell College, Iowa, 1973
M.A., Anthropology, University of Pennsylvania, 1976
M.S., Agriculture, California Polytechnic State Univ., San Luis Obispo, 1983
Ph.D., Soil Science, University of California, Riverside, 1987