Bonilla and Prosper soils are in swales and have mollic epipedons more than 20 inches thick. Clarno, Egan, Eakin, Hand, Homme, and Houdek soils are leached of carbonates to depths of more than 5 inches and are on similar but less sloping landscapes. In addition, they typically are below areas of Ethan soils. Davison soils are on slight rises adjacent to depressed drainageways and closed depressions and have redoximorphic features within 30 inches. Runoff is medium to very high.
Permeability is moderate in the solum and moderately slow in the underlying material.
These soils are mostly cultivated. Principal crops are small grain, corn, alfalfa, and pasture. Native vegetation is big bluestem, blue grama, green needlegrass, little bluestem, needleandthread, sideoats grama, western wheatgrass, and sedges. Large extent in east central and south central South Dakota, east of the Missouri River. Hutchinson County, South Dakota, 1974.