The Agar, Highmore and Holdrege soils do not have horizons with more than 15 percent fine sand or coarser above 40 inches. The Fairlo soils are underlain by clayey sediments. The Monticello and Northdale soils have redder hue. The Paka soils have soft siltstone at depths of 40 to 60 inches. Nearly level to sloping uplands.
Slopes are smooth, plane or convex.
Slope gradients range from 0 to 9 percent. Eakin soils formed in a silty mantle overlying glacial till. Mean annual temperature ranges from 45 to 48 degrees F, and precipitation ranges from 17 to 21 inches. These are the Agar , DeGrey , Glenham , Highmore , Mobridge , Onita , Raber , and Walke soils. Agar soils are intermingled in areas where the silty mantle is loess.