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United States Department of Agriculture

Agricultural Research Service

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Image Number K10853-1

Accurate and precise determinations of nutrient levels in water and soil samples are essential for evaluating buffer effectiveness. Here, chemist Leila Hargett prepares water samples for nutrient analysis by automated colorimetry.

Photo by Peggy Greb.

640 pixels wide: (k10853-1.jpg)

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Last Modified: 8/13/2016
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