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United States Department of Agriculture

Agricultural Research Service

Image Number D2768-1

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Image Number D2768-1

Water drained from potholes by tile risers is discharged via subsurface drains into the nearest field ditch without any filtering to remove excess phosphorus, nitrogen, or sediment.


Photo by Doug Smith.

640 pixels wide: (d2768-1.jpg)

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Last Modified: 9/27/2013
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