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2.04.9 <br />Typically the surface layer of the Agua Fria soil is brown stony loam about 2 <br />inches thick. The subsoil is reddish brown or light brown stony clay loam <br />about 22 inches thick. The upper part of the substratum is pink cobbly loam <br />about 10 inches thick, and the lower part, to a depth of 60 inches, is pink <br />very cobbly loam. <br />In the Agua Fria soil, permeability is moderately slow and available water <br />capacity is high. Effective rooting depth is 60 inches or more. Surface runoff <br />is rapid. The hazard of erosion from wind is slight and from water is <br />moderate to high. <br />On the Agua Fria soil the native vegetation consists mainly on pinyon, <br />juniper, big sagebrush, Gambel oak, and serviceberry. Western wheatgrass, <br />Indian ricegrass, need leandthread, and Junegrass are common grasses. <br />Most areas of this complex are in noncommercial woodland and are used for <br />limited grazing by livestock and wildlife and for recreational purposes. <br />Because of surface stoniness and slope, these soils are unsuited to crops. <br />Seedbed preparation and drilling of seed for pasture plantings on depleted <br />native range or in cleared areas are generally not practical because of <br />surface stoniness. A limited degree of success can be expected by <br />broadcasting seed late in summer or early in fall. Pubescent wheatgrass, <br />western wheatgrass, Russian wildrye, Indian ricegrass, and crested <br />wheatgrass are adapted species. Good pasture management is needed to <br />protect the soils from erosion and to provide grazing for livestock. <br />These soils are suited to Utah juniper and pinyon pine. They can produce 9 <br />cords per acre in a stand in which tree trunks have a diameter of 5 inches at <br />a height of one foot. The main limitations to the use of these soils for trees <br />are surface stoniness and moderate hazard of erosion. Surface stones can <br />hinder equipment operations. Special attention is needed to minimize <br />erosion during harvesting operations. <br />These soils are used for winter range by mule deer. The key species for <br />winter forage include big sagebrush, mountainmahogany, and bitterbrush. <br />PR -14 2.04-107- 03/14 <br />