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 Image Number
K7840-13
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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)
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Last Modified: 05/23/2006
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