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United States Department of Agriculture

Agricultural Research Service

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Image Number D234-1

Technician Richard Caskey (left) measures a drainage ditch next to a grass seed field while plant physiologist Stephen Griffith collects a sample to determine the amounts of nutrients and sediment in the water.

Photo by Peggy Greb.

640 pixels wide: (d234-1.jpg)

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Last Modified: 8/12/2016
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