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United States Department of Agriculture

Agricultural Research Service

Image Number D1548-1

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Image Number D1548-1

Plant physiologist Fitzgerald Booker prepares to place an optical scanner into a tube positioned in the soil to photograph soybean roots. The photos will show changes in root growth caused by elevated carbon dioxide and ozone, pumped into the open-top field chambers.


Photo by Peggy Greb.

640 pixels wide: (d1548-1.jpg)

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Last Modified: 6/27/2011