These are the competing Eakin soils and the DeGrey , Glenham , Mobridge , Onita , Raber , and Walke soils. Eakin, Glenham, and Raber soils are intermingled with Highmore soils on the more undulating landscapes. Glenham soils are fine-loamy and Raber soils are fine. DeGrey and Walke soils have a natric horizon and are on flats that are slightly lower than the Highmore soils. Mobridge and Onita soils have mollic epipedons more than 20 inches thick and are on footslopes.
Surface runoff is slow on nearly level landscapes and medium on more sloping areas.
Permeability is moderate. Winter wheat, alfalfa, corn, grain sorghum, and oats are the main crops. Native grasses are mainly western wheatgrass, needleandthread, green needlegrass, big bluestem, and blue grama. Mainly in central and south-central South Dakota east of the Missouri River. Highmore soils are extensive.