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Soils <br />Soils in [his site are dark brown to very dark brown sandy loam to light <br />clay loam acid top soil to 20 inches thick. The subsoil is a croderately <br />strong structured clay loam [o light clay, one to four feet [hick. I[ is <br />moderately permeable; lime zone is deep. There may be a number of stones or <br />cobble throughout the profile. The soil is very favorable for plant <br />growth. <br />Clayey Foothills Range Site <br />Native (Potential) Vegetation <br />Western wheatgrass dominates the cover, although big sagebrush gives the <br />site an open brushland aspect. Black sage is also present in places. Mut- <br />[ongrass, Indian ricegrass, squirreltail, Junegrass and other grasses com- <br />bine with western wheatgrass to make up well over half the plant community. <br />Beardless wheatgrass is present in northern portions of the site. Forbs are <br />scattered through but make up a minor part of the plant community. Some of <br />the most common are buckwheat, globemallow, pens[emon, and locos or milk- <br />ve[ches. Others which grow in parts of [his communinity are yarrow, balsam- <br />roo[, and aster. Douglas rabbitbrush and prickly pear are commonly occur- <br />ring plants, and there may be an occasional 4-wing saltbush or winterfa[. <br />On more moist parts of the site a few tall shrubs common to higher eleva- <br />tions may be present, and pinyon or juniper may show up. The latter are <br />confined to occasional trees or patches under natural conditions, however, <br />due to fire and other factors. See Table 2.6-5 for percentage composition <br />by weight of the principle species. <br />Total Annual Production <br />Favorable years 1200 Pounds per Acre Dry Air <br />Unfavorable years 600 " " <br />. Median years 9DO " " " " " <br />2-334 <br />