| Ph.D., Agronomy, The Pennsylvania State University, 1990.
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| M.S., Agronomy, Virginia Polytechnic Institute and State University, 1982.
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| B.S., Agronomy, Virginia Polytechnic Institute and State University, 1980.
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| 2002 Distinguished Teaching Award. College of Agricultural Food and Environmental Sciences |
| 1999 Technology Enhanced Learning Innovation Award. University of Minnesota |
| 1995 Distinguished Teaching Award. College of Agricultural Food and Environmental Sciences. |
| Joint Editor-in-Chief. Geoderma. |
| Editorial Board, Soil Science Society of America Journal. Associate Editor Division S-10 1998-2004
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| Restoration Advisory Board. Twin Cities Army Ammunition Plant. CR-3 National Cooperative Soil Survey Advisory Committee. Minnesota Representative
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| International Conference on Soil Resources: Their Inventory, Analysis, and Interpretation for Use in the 21st Century. Minneapolis, Minnesota. Program Chair. June 1999. |
| 2002 - present. Professor, Depart. of Soil, Water, and Climate; Univ. of Minnesota. |
| 1997 - 2002 Associate Professor, Depart. of Soil, Water, and Climate; Univ. of Minnesota. |
| 2001 Visiting Scientist, Queensland Department of Natural Resources. Brisbane Australia. (single-semester leave)
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| 1995 Visiting Scientist, Division of Soils, Canberra Laboratories, Commonwealth Scientific Industrial Research Organization (CSIRO); Australia (single-quarter leave)
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| 1991 - 1997 Assistant Professor, Dept. of Soil, Water, and Climate; Univ. of Minnesota.
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| 1989 - 1990 Post Doctoral Associate, Agronomy Department, The Pennsylvania State University. |
| 1986 - 1989 Graduate Assistant, Agronomy Department, The Pennsylvania StateUniversity.
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| 1982 - 1986 Research Associate, Agronomy Department, Virginia Polytechnic Institute and State University.
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| 1980 - 1982 Research Assistant, Agronomy Department, Virginia Polytechnic Institute and State University. |