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surface layer is brown gravelly sandy loam about 5 inches thick. The next 25 inches is mainly very gravelly loamy sand. Below this to a depth of 60 inches or more is very gravelly sand. The soil is moderately alkaline throughout. The Midway soil is shallow and well drained. It formed in residuum and colluvium derived dominantly from shale. Typically, the surtace is grayish brown clay about 3 inches thick. The next 3 inches is clay. Below this is clay about 12 inches thick. Platy shale is at a depth of 15 inches. The soil is moderately alkaline and slightly saline throughout. USDA Soil Unit 91- Wiley -Kim loams, 2 to 9 percent slopes. This map unit is on uplands. The native vegetation is mainly grass. Elevation is 5,500 to 6,200 feet. This unit is 55 percent Wiley loam and 40 percent Kim loam. The Wiley soil is on gentler slopes and in concave areas, and Kim soil is on the steeper slopes and ridges. The components of this unit are intricately intermingled. Also in this unit is about 5 percent Schamber sandy loam on ridges. The Schamber soil is very gravelly or very cobbly below the surface layer. The Kim soil is deep and well drained. It formed in eolian fine sand and silt. Typically, the surface layer is light brownish gray loam 8 inches thick. The underlying material to a depth of 60 inches or more is loam. The soil is mildly alkaline to a depth of 8 inches and moderatety alkaline below that depth. USDA Soif Unit 77- Fort Collins loam, 1 to 3 percent slopes. This deep, well drained -soil is on uplands. It formed in eolian sift and fine sand. The native vegetation is mainly grass. Elevation is 5,500 to 6,300 feet. Typically, the surtace layer is grayish brown loam about 4 inches thick. The sub soil is clay loam about 19 inches thick. The substratum to a depth of 60 inches or more is loam. The soil is neutral to a depth of 4 inches, mildly alkaline to a depth of 23 inches, and moderately alkaline below that depth. Included in this unit is about 10 percent Baca loam in swales and drainageways. USDA Soil Unit 60 -Olney sandy loam, 3 to 12 percent slopes. This deep, well drained soil is on uplands. It formed in calcareous eolian material. The native vegetation is mainly grass. Elevation is 5,500 to 6,900 feet. The average annual preapitation is 13 to 15 inches, the average annual air temperature is 49 to 54 degrees F, and the average frost-free period is 125 to 160 days. Typically, the surtace layer is brown sandy loam about 3 inches thick. The upper 10 inches of the subsoil is mainly sandy clay loam, and the lower part is sandy clay loam 5 inches thick. The substratum to a depth of 60 inches or more is fine sandy loam. The soil is neutral to a depth of 13 inches and moderately alkaline below that depth. Included in this unit is about 10 percent Fort Collins loam in swales. Also included are small areas of Otero sandy loam on low ridges. USDA Soil Unit 62- Otero sandy loam, 1 to 9 pen:ent slopes. This deep, somewhat excessively drained soil is on uplands with dunelike relief. It formed in eolian sand. The