Rockton soils formed in loamy sediments and limestone residuum. Depth to limestone bedrock ranges from 20 to 40 inches. Mean annual temperature is 45 to 52 degrees F., and mean annual precipitation is 26 to 32 inches. These include the competing Atkinson soils and the Kenyon , Ostrander , Racine , and Waucoma soils. Waucoma soils lack mollic epipedons and have lithic contacts at greater depths.
Surface runoff is slow to rapid.
Permeability is moderate. Commonly cropped corn, soybeans, small grains, and legume hay. Native vegetation was savanna or tall grass prairie. These soils are moderately extensive.