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United States Department of Agriculture

Agricultural Research Service

Image Number D1870-18

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Image Number D1870-18

ARS soil scientist Ray Bryant (left) and UMES associate professor Arthur Allen collect samples of groundwater before and after it is filtered through an underground “curtain” of gypsum. The low-cost gypsum curtains remove phosphorus from the groundwater before it flows into a drainage ditch, preventing the phosphorus from reaching the Chesapeake Bay.

 

Photo by Stephen Ausmus.


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Last Modified: 7/29/2010
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