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United States Department of Agriculture

Agricultural Research Service

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Image Number D1548-1

Plant physiologist Fitzgerald Booker prepares to place an optical scanner into a tube that will be positioned in the soil to photograph soybean roots. The photos will be analyzed to determine changes in root length and distribution caused by exposure to elevated carbon dioxide and ozone, which are pumped into the open-top field chambers.


Photo by Peggy Greb.

640 pixels wide: (d1548-1.jpg)

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Last Modified: 8/13/2016
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