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United States Department of Agriculture

Agricultural Research Service

Image Number D1552-1

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Image Number D1552-1

Soil scientist Dennis Timlin (left) and plant physiologist Richard Sicher measure chlorophyll concentrations in corn leaves exposed to elevated carbon dioxide.


Photo by Peggy Greb.

640 pixels wide: (d1552-1.jpg)

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Last Modified: 11/19/2009
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