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United States Department of Agriculture

Agricultural Research Service


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Dairy cows.

Image Number K5785-14

To preserve the nitrogen content of manure for fertilizer, Agricultural Research Service dairy scientists are helping farmers to choose the right feeds for cows and are developing tests to analyze for manure nutrients.

Photo by Keith Weller



640 pixels wide: (k5785-14.jpg)




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Last Modified: 8/13/2016
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