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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.
