Bonilla and Prosper soils are in swales and have mollic epipedons more than 20 inches thick. Clarno, Ethan, Glenham, Houdek, and Java soils are on less sloping parts of the landscape. All of these soils have mollic epipedons. Runoff is medium to very high. Permeability is moderate in upper part and moderately slow in the underlying material.
Principal use is native range, but some areas are cultivated.
Native grasses are mainly needleandthread, blue grama, big bluestem, little bluestem, green needlegrass, western wheatgrass, plains muhly, and sideoats grama. Where the Betts soils are in complex with other soils on undulating to rolling landscapes they are used for the growing of small grains, corn, and other feed crops. East-central and southeastern South Dakota and adjoining parts of Nebraska. The series is extensive. Pierce County, Nebraska, 1970.