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• SOILS INFORMATION <br />Progresso loam, 5 to 12 percent slopes <br />This is a moderately deep, well drained soil that overlies hard Dakota <br />Sandstone at a dpth of 20 to 40 inches. It formed in locally <br />transported sediment derived from interbedded sandstone and shale and is <br />on uplands and fans. Elevation ranges from 5,800 to 7,000 feet. <br />Average annual precipitation is about 12 inches, average annual air <br />temperature is about 46 degrees F, and the average frost-free season is <br />about 115 days. <br />Typically the surface layer is pinkish gray loam about 5 inches thick. <br />The subsoil is brown or light brown clay loam about 17 inches thick. <br />The substratum is white channery loam. Hard sandstone is at a depth of <br />about 30 inches. <br />• Permeability is moderate, and available water capacity is moderate. <br />Effective rooting depth is about 20 to 40 inches. Surface runoff is <br />medium to rapid. The hazard of erosion from wind is moderate and from <br />water is high. <br />Included with this soil in mapping are a few small areas of Kech, Potts, <br />Lazear, and Shavano soils. Also included are areas of Progresso soils <br />that have a channery surface layer and areas where sandstone bedrock <br />crops out. <br />The native vegetation on this soil consists mainly of pinyon, juniper, <br />big sagebrush, Indian ricegrass, needleandthread, Junegrass, native <br />bunch bluegrass, and wheatgrass. <br />Some areas of this soil are in native vegetation and are used for <br />grazing of livestock and wildlife and for recreational purposes. Some <br />areas are used for irrigated crops, mainly hay, small grains, and <br />irrigated pasture. <br />