Shows soil types classification by colors and symbols. 'Field Operations, Bureau of Chemistry and Soils.' 'Litho Eastern Offset Inc., Balto.' Scale 1:63,360. 1 inch = 1 mile.W 86���������19���������--W 85���������51���������/N 38���������47���������--38���������25���������). U.S. Department of Agriculture, Bureau of Chemistry and Soils; Purdue University Agricultural Experiment Station; soils surveyed by J.T. Miller, in charge and Howard Wm. Higbee, U.S. Department of Agriculture and M.E. Waggoner, Purdue University Agricultural Experiment Station.