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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K11947-1

John Jifon, a plant physiologist at Texas A&M University Experiment Station, measures photosynthetic activity of plants sprayed with potassium for comparison to that of nonsprayed plants.

Photo by Peggy Greb.

640 pixels wide: (k11947-1.jpg)

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Last Modified: 5/23/2006
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