Ethan soils have carbonates within 10 inches of the surface and are on upper slopes. Houdek soils have an argillic horizon and are on similar landscapes to the Clarno soils. Tetonka soils are fine textured and wetter and are in depressions. Well drained or moderately well drained. Surface runoff is low to high.
Permeability is moderately slow.
Most areas are cultivated and small grains, corn, and alfalfa are principal crops. Native vegetation is little bluestem, big bluestem, green needlegrass, needleandthread, western wheatgrass, sideoats grama, blue grama, and forbs. South-central and southeast South Dakota, east of the Missouri River and northeast Nebraska. The series is extensive. Pierce County, Nebraska, 1970.