Image Number D1753-1
University of Maryland ecologist Pat Kangas (left) and ARS microbiologist Walter Mulbry examine algae growing on a shallow raceway at the BARC Dairy Research Unit. Mulbry estimates that each acre of raceway could remove the nutrients from the manure of about 20 cows.
Photo by ©Edwin Remsburg. Used by permission(D1753-1).
640 pixels wide: (d1753-1.jpg)