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United States Department of Agriculture

Agricultural Research Service

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Image Number D2240-1

In Beltsville, Maryland, soil scientist Lynn McKee and physical scientist Joseph Alfieri check the surface and subsurface soil moisture monitoring systems at the Optimizing Production Inputs for Economic and Environmental Enhancement (OPE3) study area.


Photo by Peggy Greb.

640 pixels wide: (d2240-1.jpg)

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Last Modified: 8/13/2016
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