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United States Department of Agriculture

Agricultural Research Service

Image Number D2415-1

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Image Number D2415-1

ARS researchers are studying how nitrates and phosphorus affect water quality in a crop field that has been converted to native prairie vegetation at the Neal Smith National Wildlife Refuge near Prairie City, Iowa.


Photo by Jeff Cook.

640 pixels wide: (d2415-1.jpg)

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Last Modified: 1/31/2012