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United States Department of Agriculture

Agricultural Research Service

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Image Number D1621-4

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


Photo by Stephen Ausmus.

640 pixels wide: (d1621-4.jpg)

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Last Modified: 8/13/2016
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