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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K10851-1

Technician Chris Clegg prepares samples for nitrogen gas analysis to estimate denitrification rates. During denitrification, microbes remove nitrate from shallow groundwater.

Photo by Peggy Greb.



640 pixels wide: (k10851-1.jpg)




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Last Modified: 5/23/2006
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