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~~--~- • • <br />-3- 8209 Shallow Foothill <br />c. If ecological retrogression is cattle-induced, plant <br />big bZuestem, yellow Indiangrass, sideoats gtama~..mc <br />muhly, switchgrass, and Griffith wheatgrass will dec <br />disappear from the plant community. Many forbs and <br />increase. If retrogression is sheep induced mountai <br />and many forbs will decrease and many grasses will ~ <br />With further deterioration, cheatgrass, Japanese brc <br />other annuals invade the site. <br />d. Vegetation density?/ is approximately 10 percent. <br />4. Annual Production <br />If the range is in excellent condition, the approximate <br />production (air-dry) is: <br />favorable years <br />normal years <br />unfavorable years <br />600 pounds/Ac <br />450 pounds/Ac <br />300 pounds/Ac <br />Of this production, 5 to 15 percent will likely be unpal <br />livestock. <br />5. Soils <br />a. The soils of this site are shallow and well drained. <br />on upland ridges and formed primarily from sandstone <br />limestones. Surface texture can vary from a stoney <br />to a Zoam. <br />Permeability is moderate. Available water capacity <br />Runoff is moderate to rapid and erosion can be seve. <br />cover is destroyed. <br />b. Major soils associated with this site are: <br />Soil Unit <br />Haller stony sandy loam <br />I~rna1 sandy loam <br />Fortwingate Zoam <br />la port Zoam <br />Penrose channery loam <br />Pu rner fine sandy Loam <br />Rizozo loam <br />Stroupe extremely stony loam <br />Tarryall gravelly loam <br />MLRA 49 <br />such as <br />ase or <br />.rubs will <br />mahogany <br />rease. <br />and <br />kotal annual <br />72 Kq/Ha <br />D4 Kg/Ra <br />36 Kg/Ra <br />e to <br />They occur <br />and <br />ndy Zoam <br />r Zow. <br />if plant <br />1/ Vegetation density = basal area. This is the area of ground urface <br />/`" covered by the perennial stem or stems. Usually, this is meas red one <br />inch (2.54 cm) above the soil in contrast to the full spread o <br />perennial foliage. <br />