Water Quality research at CSWQRU concentrates on the claypan soils which cover over 10 million acres in northeast Missouri and surrounding states.
Herbicide contamination of surface runoff is the principal water quality problem on claypan soil watersheds. Atrazine and alachlor concentrations in surface runoff from cropped fields are from 10 to 100 times higher than current drinking water standards in the 45 to 60 days following chemical application in the spring.
Lowering herbicide application rates in alternative farming systems reduces concentrations in surface runoff, but not enough to meet drinking water standards.
Nitrate-N contamination of the aquifer is widespread throughout the claypan soil region. Approximately 25% of wells exceed the 10 ppm nitrate-N drinking water standard. In some cases, elevated ground water nitrates are associated with poor nitrogen management on cropped fields.
|Read more about our research on riparian zones for reduction of atrazine contamination in water in the January 2009 issue of Agricultural Research , the U.S. Department of Agriculture's science magazine.|
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- DEVELOPMENT OF ALTERNATIVE PRACTICES FOR IMPROVED WATERSHED MANAGEMENT
- OPTIMIZING IRRIGATION MANAGEMENT FOR HUMID CLIMATES
- CONSERVATION EFFECTS ASSESSMENT PROJECT - THE ARS WATERSHED ASSESSMENT STUDY
- DEVELOPMENT AND APPLICATION OF A GIS-BASED RISK ASSESSMENT TOOL FOR TARGETING CONSERVATION PRACTICES TO IMPROVE WATER QUALITY
- EVALUATING EFFECTS OF BEST MANAGEMENT PRACTICES FOR CROP PRODUCTION IN MARK TWAIN LAKE BASIN
- IMPROVING IRRIGATION PRACTICES AND IRRIGATED CROP PRODUCTION IN SOUTHEAST MISSOURI
- SYSTEMS AND TECHNOLOGIES FOR SUSTAINABLE SITE-SPECIFIC SOIL AND CROP MANAGEMENT
- CONSERVATION EFFECTS ASSESSMENT PROJECT - COLUMBIA
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