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• Class VII soils are not suited Eor cultivation and have very severe limitations. <br />They are suited for range, woodland or wildlife uses if carefully managed. Phy- <br />sical practices such as pitting, furrowing, seeding, etc. usually cannot be con- <br />ducted. <br />Factors directly influencing these capability classes are wind and water erosion, <br />and climate. Climate influences the growing season and available moisture which <br />strongly affects plant growth. <br />Major uses and interpretations for each of the three range sites are depicted in <br />Tables 2.5-2, 2.5-3 and 2.5-4. <br />Premining vegetative samples were collected by Trapper Mine environmental person- <br />nel to determine [he production of two major plant communities within the pro- <br />posed permit boundaries. The vegetative production for mountain shrub, and sage- <br />brush-grass types are as follows: <br />• <br /> Mountain shrub 1600 pounds per acre air dry <br /> Sagebrush-grass 3200 pounds per acre air dry <br />These premining vegetative samples represent one year's collection of data. They <br />were collected by clipping [he annual growth from randomly selected exclosure <br />plots for dry matter production. Point [ransects eight meters Long were used for <br />aerial cover. Measurements were taken from a height of four and one-half feet <br />above ground level. Section 4.4 describes in detail [he sampling technique <br />briefly described above. <br />The three range sites identified by the Soil Conservation Service, clayey foot- <br />hills, brushy loam, and deep loam were evaluated for vegetative production under <br />varying management practices. These sites are shown with the corresponding vege- <br />tative production possible under best management (favorable years), a low level <br />of management (unfavorable years), and normal management (median years). Also <br />see Section 2.6.1.3. <br /> <br />2-174 <br />