The climate is arid with cool, moist winters and hot, dry summers. The mean annual precipitation is 4 to 6 inches, the mean annual temperature is 50 to 54 degrees F., and the frost-free period is 120 to 150 days. These are the Dobel , Orphant , and Vigus soils. Dobel soils are loamy, very shallow and shallow to duripans, and have argillic horizons. Orphant soils are loamy, shallow to cemented duripans, and have argillic horizons.
Vigus soils are fine-loamy, very deep, and have argillic horizons.
Roic soils are used for rangeland and wildlife habitat. The vegetation is mainly Bailey greasewood, shadscale, bud sagebrush, winterfat, desert needlegrass, and Indian ricegrass. These soils are moderately extensive. MLRAs 29 and 27.