United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with Ohio Department of Natural Resources, Division of Soil and Water Conservation ... [and others]
United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with the Research Division of the College of Agricultural and Life Sciences, University of Wisconsin
United States Department of Agriculture, Soil Conservation Service ; in cooperation with the University of Florida, Institute of Food and Agricultural Sciences, Agricultural Experiment Stations, and Soil Science Department; and the Florida Department of Agriculture and Consumer Services