University of Illinois Urbana-Champaign

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Showing 4321–4350 of 6,001 items
Thumbnail for Mass balance of nitrogen and phosphorus in an agricultural watershed : the shallow groundwater component
Mass balance of nitrogen and phosphorus in an agricultural watershed : the shallow groundwater component
Mehnert, Edward; Dey, William S.; Hwang, Hue-Hwa; Keefer, Donald A.; Holm, Thomas R.; Johnson, Thomas M.; Beaumont, Will C.; Wander, Matthew C.F.; Sanford, Robert A.; McDonald, Jennifer M.; Shiffer, Shawn M.

Thumbnail for Annual Report : July 1, 1988-June 30,1989
Annual Report : July 1, 1988-June 30,1989
Illinois. Hazardous Waste Research and Information Center

Thumbnail for Quality of surface water in Illinois, 1956-1966
Quality of surface water in Illinois, 1956-1966
Harmeson, Robert Harold; Larson, Thurston Eric