Average annual precipitation ranges from 8 to 14 inches. Average annual temperature ranges from 45 to 52 degrees F. Frost-free period is 80 to 145 days. These are the Arbidge , Buncelvoir , Hardtrigger , Laped , Minveno , Snowmore and Troughs series. Arbidge and Snowmore soils are 20 to 40 inches deep to a duripan. Hardtrigger soils lack an indurated duripan.
Laped soils have less organic matter in the surface horizon and are drier.
Minveno soils lack an argillic horizon. Troughs soils have greater than 35 percent coarse fragments in the argillic horizon. Arbidge, Buncelvoir, Hardtrigger and Snowmore soils are on lower sideslopes and toeslopes. Laped, Minveno and Troughs soils are on similar landscape positions. Bruncan soils are used mainly for rangeland and wildlife habitat.