Fate and transport of glyphosate and aminomethylphosphonic acid in surface waters of agricultural basins von Coupe, Richard H, Kalkhoff, Stephen J, Capel, Paul D, Gregoire, Caroline

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One Ranney Well Can Make a Difference: The Impacts of a Radial Collector Well on Groundwater Level and Quality in the Cedar River Alluvial Aquifer von Haj, Adel E., Gruhn, Lance R., Kalkhoff, Stephen J.

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Stability of low levels of perchlorate in drinking water and natural water samples von Stetson, Sarah J., Wanty, Richard B., Helsel, Dennis R., Kalkhoff, Stephen J., Macalady, Donald L.

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Decadal surface water quality trends under variable climate, land use, and hydrogeochemical setting in Iowa, USA von Green, Christopher T., Bekins, Barbara A., Kalkhoff, Stephen J., Hirsch, Robert M., Liao, Lixia, Barnes, Kimberlee K.

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Eleven‐Year Trend in Acetanilide Pesticide Degradates in the Iowa River, Iowa von Kalkhoff, Stephen J., Vecchia, Aldo V., Capel, Paul D., Meyer, Michael T.

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Occurrence of selected herbicides and herbicide degradation products in Iowa's ground water, 1995 von Kolpin, D.W, Kalkhoff, S.J, Goolsby, D.A, Sneck-Fahrer, D.A, Thurman, E.M

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Comparison of Fate and Transport of Isoxaflutole to Atrazine and Metolachlor in 10 Iowa Rivers von Meyer, Michael T, Scribner, Elisabeth A, Kalkhoff, Stephen J

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HERBICIDES AND TRANSFORMATION PRODUCTS IN SURFACE WATERS OF THE MIDWESTERN UNITED STATES von Battaglin, William A., Thurman, Earl M., Kalkhoff, Stephen J., Porter, Stephen D.

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Herbicides and Herbicide Degradation Products in Upper Midwest Agricultural Streams during August Base-Flow Conditions von Kalkhoff, Stephen J, Lee, Kathy E, Porter, Stephen D, Terrio, Paul J, Thurman, E. Michael

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Atrazine degradation in a small stream in Iowa von Kolpin, Dana W, Kalkhoff, Stephen J

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HERBICIDES AND TRANSFORMATION PRODUCTS IN SURFACE WATERS OF THE MIDWESTERN UNITED STATES1 von Battaglin, William A., Thurman, Earl M., Kalkhoff, Stephen J., Porter, Stephen D.

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Comparison of Fate and Transport of Isoxatlutole to Atrazine and Metolachior in 10 Iowa Rivers von Meyer, Michael T, Scribner, Elisabeth A, Kalkhoff, Stephen J

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Stability of low levels of perchlorate in drinking water and natural water samples: Perchlorate an enigma for the new millennium von STETSON, Sarah J, WANTY, Richard B, HELSEL, Dennis R, KALKHOFF, Stephen J, MACALADY, Donald L

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RELATION BETWEEN STREAM-WATER QUALITY AND GEOHYDROLOGY DURING BASE-FLOW CONDITIONS, ROBERTS CREEK WATERSHED, CLAYTON COUNTY, IOWA von Kalkhoff, Stephen J.

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HERBICIDES AND TRANSFORMATION PRODUCTS IN SURFACE WATERS OF THE MIDWESTERN UNITED STATES 1 von Battaglin, William A., Thurman, Earl M., Kalkhoff, Stephen J., Porter, Stephen D.

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RELATION BETWEEN STREAM‐WATER QUALITY AND GEOHYDROLOGY DURING BASE‐FLOW CONDITIONS, ROBERTS CREEK WATERSHED, CLAYTON COUNTY, IOWA1 von Kalkhoff, Stephen J.

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RELATION BETWEEN STREAM‐WATER QUALITY AND GEOHYDROLOGY DURING BASE‐FLOW CONDITIONS, ROBERTS CREEK WATERSHED, CLAYTON COUNTY, IOWA 1 von Kalkhoff, Stephen J.

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Agricultural chemicals in ground and surface water in a small watershed in Clayton County, Iowa, 1988-91 / by Stephen J. Kalkhoff and Bryan D. Schaap ; prepared in cooperation with... von Kalkhoff, Stephen J

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Brine contamination of ground water and streams in the Baxterville Oil Field area, Lamar and Marion Counties, Mississippi / by Stephen J. Kalkhoff von Kalkhoff, Stephen J

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Water quality of Corydon Reservoir before implementation of agricultural best-management practices in the basin, Wayne County, Iowa, September 1990 to September 1991 / by Stephen J... von Kalkhoff, Stephen J

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