My expertise is in modeling chemical movement, through soil, to groundwater. At the North Dakota MSEA we're looking at the effects of a corn/soybean cropping system, under ridge tillage and one that's irrigated, on movement of various agricultural chemicals to groundwater. Primary And Secondary Areas of Interest: Water Movement, Preferential Flow Modeling, GIS, Data Base Development. Electronic Mail: knighton@badlands.nodak.edu Mailing Address: Dept. Of Soil Science Walster Hall, NDSU Fargo, ND 58105

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