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These soils are used for wildlife habitat and grazing. The native vegetation on these soils is mainly pinyon and juniper. The understory is junegrass, serviceberry, bitterbrush, wheatgrass, and sagebrush. When the understory vegetation deteriorates, forbs and shrubs increase and grasses almost disappear. Properly managing grazing maintains and improves the vegetation. Reducing brush improves grazing on the Ildefonso soil where the slope is less than 15 percent if the grass understory is adequate and desirable shrubs are not destroyed. Properly managing grazing maintains and improves the understory vegetation. Reducing brush on the Ildefonso soil where the slope is less than 15 percent improves deteriorated vegetation if the grass understory is adequate and if desirable shrubs are not destroyed. Selectively thinning pinyon and juniper on the Lazear soil improves grazing and provides firewood and posts. Steep slopes and the sever erosion hazard affect harvesting. These soils can produce about 6 cords of wood per acre when trees more that 4.5 feet tall reach an average diameter of 5 inches. Mule deer, gray squirrel, and cottontail rabbit find habitat on these soils. Use of these soils for community development and as a source of construction material is limited by depth to bedrock, steep slopes, and large stones. This complex is in capability subclass Vlle, nonirrigated. Potts Loam This deep, well drained, moderately sloping to rolling soil is on mesas, benches, and sides of valleys. Elevation ranges from 5,000 to 7,000 feet. This soil formed in alluvium derived from sandstone, shale or basalt. The average annual precipitation is about 14 inches, the average annual air temperature is about 46 degrees F, and the average frost- free period is about 120 days. Typically, the surface layer is brown loam about 4 inches thick. The subsoil is reddish brown clay loam about 24 inches thick. The substratum is pinkish white loam to a depth of 60 inches. Included with this soil in mapping aze small areas of Kim, Olney, and Ildefonso soils that have slopes of 6 to 12 percent. These areas make up 10 to 15 percent of the map unit. Permeability is moderate, and available water capacity is high. Effective rooting depth is 60 inches or more. Surface runoff is medium, and the erosion hazard is severe. This soil is used mainly for grazing, wildlife habitat, and some dryland farming, bazley and oats aze grown. Minimum contour tillage and stubble mulching help to prevent excessive erosion. The native vegetation on this soil is mainly wheatgrass, needle and thread, and sagebrush.