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The program was developed by Alan Rotz, an ag engineer in USDA's Ag Research Service's Pasture Systems and Watershed Management Research Unit in University Park, Pa. The studies, done in collaboration with Ray Bryant, research leader at the ARS Pasture Systems and Watershed Management Research Unit in University Park, Pennsylvania, may benefit states along the nation's mid-to-southern-Atlantic seaboard, where sandy soils generally take up and hold less phosphorus than finer-textured soils. A phosphorus index was developed by Penn State and the USDA-Agricultural Research Service (ARS) Pasture Systems and Watershed Management Research Unit at University Park, Pa. |
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