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n U Exhibit B -Site Description Baller Series • The Baller series consists of shallow, well drained soils that formed in material weathered from sand- stone. These soils are on uplands and are underlain by bedrock at a depth of 10 to 20 inches. Elevation ranges from 0,400 to 6,800 feet. Slopes area to 45 percent. The native vegetation is mainly big and little bluestem, blue grama, aide-oats grama, mountainmahogany, and a few scattered ponderosa pine. 1~Iean annual precipi- tation ranges from 15 to 17 inches, mean annual air temperature ranges from 47' to 49° F, and the frost- free season ranges from 13o to la0 days. In a representative profile the surface layer is dark grayish brown stony sandy loam about 6 inches thick. The subsurface layer is dark grayish brown very stony sandy loam about 5 inches thick. Belo~r- this is hard sandstone. Permeability is moderately rapid, and the available water capacity is low. Reaction is neutral. These soils are used for native grasses. Representative profile of Baller stony sandy loam in an area of Baller-Rock outcrop complex, 15 to 45 per- cent slopes, in native grass, about 1,Oa0 feet west and 1,650 feet north of the southeast corner of sec. 32, T. 7 N., R. 69 W.: Al-0 to 6 inches; dark grayish brown (lOYR 4/2) stony sandy loam, very dark gray- ish brown (lOYR 3/2) moist; weak to moderate fine granular structure; soft, very friable; 25 percent stones and cob- bles; noncalcareous; neutral; clear smooth boundary. A(',-6 to Il inches; dark grayish brown (lOYR 4/2) very stony sandy loam, very dark grayish brown (lOYR 3/2) moist; mas- sive; soft, very friable; 60 percent stones and cobbles; noncalcareous; neutral. R-11 inches; hard sandstone bedrock. The A horizon is sandy loam or fine sandy loam and contains 35 to 70 percent stones or cobbles, mainly of sandstone. Reaction ranges from slightly acid to mildly alkaline. n U