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Domenic Leone Const. Co. Limited Impact Penait Appl. Exhibit "D" - So11s Attachment Otero floe sandy loam, 1 to 9 percent slopes. This deep, somewhat excessively drained soils is on foots lopes uplands. It formed in alluvium and eolian sand. The native vegetation is mainly grass. Elevation is 6,300 to 7,500 feet. The average annual preciplt~tion is 12 to 15 inches, the average annual air temperature is 48 to 52 the average frost-free period is 100 to 130 days. Typically, the surface layer is light brownish gray sandy loam thick. The substratum to a depth of 60 inches or more is sandy loam mildly alkaline to d depth~d>: 6 1n .s and moderately alkaline below Included in this unit is about 20 percent Kim fine sandy loam between low, dunelike ridges. Also included are small areas of Oiney in drainageways. Permeability of this Otero soil is moderately rapid. Available F, and 6 inches ~e soil is t depth.•. areas ndv loam r capacity is moderate. Effective rooting depth is 60 inches or more. Runoff is ¢low to median, and the hazard of soil blowing is high. This unit is used as rangeland. The potential plant community on this unit is mainly big bluest~m, little bluestem, and sand reedgrass. Other grasses that characterize the uni are blue grama, sideoats grama, needleandthread, and western wheatgrass. The a eaage annual production of air-dry vegetation is about 1,100 pounds per acre.. If t e condition of the range deteriorates, blue grama, threeawn, snakeweed, yucca, an rabbitbrush increase. Range feeding is suitable if the range is in poor condition If this unit is used for windbreaks and environmental planting, the main limitations are the droughtiness of the soil and the hazard of soil bowing in disturbed areas. The unit is well suited to homesites development. Revegetating disturbed areas around construction sites as soon as possible helps to control oil blowing.