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Cheyenne County, Colorado to 40 inches. Runoff is rapid, and the hazard of water erosion is high. The hazard of soil blowing is moderate. The Midway soil is shallow. It formed in clayey residuum derived dominantly from soft shale. Typically, the surface layer is pale brown, calcareous clay loam 2 inches thick. The subsoil is light brownish gray, calcareous clay 5 inches thick. The substratum is light gray, calcareous clay 6 inches thick. It is underlain by soft shale. Permeability is slow in the Midway soil. Available water capacity is low. The effective rooting depth is 10 to 20 inches. Runoff is rapid, and the hazard of water erosion is high. The hazard of soil blowing also is high. These soils are used as rangeland or as wildlife habitat. The potential plant community on the Razor soil is mainly western wheatgrass, blue grams, and green needlegrass. The average annual production of air-dry vegetation ranges from 500 to 1,100 pounds per acre. The potential plant community on the Midway soil is mainly alkali sacaton, western wheatgrass, blue grams, and sideoats grams. The average annual production of air-dry vegetation ranges from 300 to 950 pounds per acre. The production of vegetation suitable for grazing by livestock is limited by the slope and a slow water intake rate and by the low available water capacity of the Midway soil. The suitability of these soils for range seeding is poor. The main limitations are the slope, the low available water capacity of the Midway soil, and the hazard of erosion. Loss of the surface layer through erosion severely decreases the ability of the soils to produce plants suitable for grazing. Contour furrowing, ripping, and pitting help to control runoff and increase the water intake rate. These measures are especially effective if the range is in poor or fair condition. Deferred grazing, rotating grazing, and alternating the season of grazing are suitable management practices. These soils are poorly suited to windbreaks and environmental plantings and to homesite development. The land capability subclass is Vlle, nonirrigated. The Razor soil is in the Clayey Plains range site, and the Midway soil is in the Shaly Plains range site. 37~ampson loam, 0 to 2 percent slopes. This deep, well drained soil is in swales and drainageways. It formed in calcareous, medium textured, mixed alluvium. The average annual precipitation is 13 to 17 inches. The vegetation in uncultivated areas is mainly short and mid grasses. Areas are elongated and are 20 to 160 acres in size. Typically, the surface layer is dark grayish brown loam 5 inches thick. The upper 25 inches of the subsoil 43 is brown clay loam. The lower 20 inches is brown, calcareous clay loam. The substratum to a depth of 78 Inches or more is pale brown, calcareous loam. Included in this unit are small areas of Goshen silt loam, Satanta loam, and Glenberg sandy loam. Included areas make up about 25 percent of the total acreage. Permeability is moderate in the Sampson soil. Available water capacity is high. The effective rooting depth is 60 inches or more. Runoff is slow, and the hazard of water erosion is slight. The hazard of soil blowing is moderate. This soil is subject to rare flooding. This soil is used mainly as rangeland. It also is used as nonirrigated or irrigated cropland. The potential plant community is mainly western wheatgrass, switchgrass, green needlegrass, and big bluestem. The average annual production of air-dry vegetation ranges from 1,100 to 3,000 pounds per acre. The suitability of this soil for range seeding is good. Seeding in the stubble of the preceding crop preserves the ground cover. The stubble helps to trap snow and thus increases the supply of moisture. Chiseling and pitting improve the infiltration of water. These measures are especially beneficial if the range is in poor condition. This soil is well suited to nonirrigated crops. It is limited mainly by occasional periods of droughtiness, which increase the hazard of soil blowing, and by rare, brief periods of flooding. Maintaining crop residue on or near the surface helps to control runoff and soil blowing and maintains filth and the organic matter content. Tillage should be minimized. Soil blowing can be controlled by planting crops in alternate strips at right angles to the prevailing wind. Some areas of this soil are irrigated. Both sprinkler and furrow irrigation systems are suitable. The main management concerns are the proper use of irrigation water and measures that maintain fertility and control soil blowing. Irrigation water should be applied at a rate that ensures optimum production without increasing the hazards of deep percolation, runoff, and erosion. For the efficient application and removal of irrigation water, leveling is needed in the mare sloping areas. Applications of manure and commercial fertilizer that contains nitrogen and phosphorus help to maintain the productivity of the soil. Returning crop residue to the soil or regularly adding other organic matter improves fertility, minimizes crusting, and increases the water intake rate. Soil blowing can be controlled by keeping the surface rough and cloddy when it is not protected by vegetation. This soil is well suited to windbreaks and environmental plantings. Summer fallow, cultivating for