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Title: Phosphorus in Surface Runoff: Best Management Practices and Soil Dynamics

Duration: 9/1/97 to 8/31/00

Federal Funds Requested: $71,358

Non-Federal Funds Pledged: 197,434

Principal Investigators:

Gary M. Pierzynski, Associate Professor, Department of Agronomy, Throckmorton Hall, Kansas State University Manhattan, KS 66506

Keith Janssen , Associate Professor , Kansas State University , East Central Experiment Field 2149 Montana Road Ottawa, KS 66067

Daniel Devlin, Associate Professor, Extension Agronomy, Throckmorton Hall, Kansas State University, Manhattan, KS 66506

Congressional District: Second

Statement of Critical Regional or State Water Problems:

Despite recent media attention on nitrates and pesticides in groundwater, phosphorus (P) in surface waters represents a significant threat to surface water quality. Several notable examples include sensitive water bodies in the Atlantic Coastal Plain, the Great Lakes, western Oregon, eastern Washington, and Florida. Recent water quality data for Kansas and the Great Plains indicates that nearly all surface water bodies are severely impacted by P as indicated by total P concentrations. The P in the surface waters comes primarily from surface runoff with a large majority of the runoff attributable to agricultural lands. A recent study of the Big Bull Creek watershed in eastern Kansas estimated that 80 to 95% of the P load came from nonpoint sources. Phosphorus contributes to eutrophication of surface water bodies and is characterized by frequent algal blooms, low dissolved oxygen concentrations, low species diversity, taste and odor problems, and impairment of recreational and navigational activities.

U.S. Department of the Interior, U.S. Geological Survey

Maintained by: John Schefter
Last Updated: Wednesday March 23, 2005 9:17 AM
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