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United States Department of Agriculture

Agricultural Research Service

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Image Number D1621-5

Using closed-vented chambers, biological science aide Rochelle Jansen (right) and soil scientist Jane Johnson collect gas emissions from soil at a research farm. Samples will be analyzed for carbon dioxide, nitrous oxide, and methane.


Photo by Stephen Ausmus.

640 pixels wide: (d1621-5.jpg)

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Last Modified: 8/13/2016
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