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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number D100-17

Agronomist David Nielsen (right) uses a neutron probe while technician Martin Walker uses time domain reflectometry to measure soil water use by growing winter wheat in the alternative crop rotation study.

Photo by Stephen Ausmus.

640 pixels wide: (D100-17.jpg)

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Last Modified: 5/23/2006
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