Tetonka soils have E horizons and argillic horizons and are in depressions. Trent, Viborg, and Whitewood soils have thick mollic epipedons and are in swales and concave positions. Worthing soils are fine, have argillic horizons, and are in depressions. Somewhat poorly drained. Surface runoff is low.
Permeability is moderate.
Subsoil drainage is affected by the capillary rise of water from a seasonal water table at 1.5 to 2.5 feet which concentrates lime, gypsum, and other salts in the B horizons. Most areas are used to grow corn, soybeans, small grain, and alfalfa. Principal native grasses are big bluestem, indiangrass, little bluestem, needlegrasses, and sedges. The series is of moderate extent. Clay County, South Dakota, 1953.