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.
640 pixels wide: (d1870-18.jpg)