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ARS Home Office of Communications Images Photos Nov97





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Image Number K7840-13 In a small watershed near Treynor, Iowa, hydrologist Mike Burkart (left) and farmer Bill Vorthman draw water from a 30-foot-deep sampling well to test for herbicides and nitrate. Photo by Keith Weller.  640 pixels wide: (k7840-13.jpg)   Please visit our Image Gallery


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