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United States Department of Agriculture

Agricultural Research Service

Image Number D2402-1

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Image Number D2402-1

Subsurface drainage water from individual field plots is routed to this sump where flow is measured and samples are prepared for nitrate testing. Here, soil microbiologist Tom Moorman takes a water sample for nitrate analysis.


Photo by Peggy Greb.

640 pixels wide: (d2402-1.jpg)

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Last Modified: 1/31/2012