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i ~ Clayey foothills <br />~ Favorable years <br />~ Unfavorable years <br />Median years <br />Brushy loam <br /> <br />r~ <br />Favorable years <br />Unfavorable years <br />Median years <br />Deep loam <br />Favorable years <br />Unfavorable years <br />Median years <br />1200 pounds per acre air dry <br />600 pounds per acre air dry <br />900 pounds per acre air dry <br />3000 pounds per acre air dry <br />1500 pounds per acre. air dry <br />2000 pounds per acre air dry <br />1800 pounds per acre air dry <br />900 pounds per acre air dry <br />1500 pounds per acre air dry <br />Sagebrush-grass communities occur in clayey foothills and deep loam range sites, <br />and mountain shrub communities are found in the brushy loam range sites. <br />It can be seen from the values obtained during premining sampling that sagebrush- <br />grass types exceeded the favorable years projections in dry matter yield in 1979 <br />as set forth by [he Soil Conservation Service. The mountain shrub data indicate <br />an unfavorable year. However, only herbaceous production was sampled for in the <br />mountain shrub community during 1979. <br />As previously mentioned, the range site descriptions and dry matter yields, as <br />described by the Soil Conservation Service, are based on broad soil characteris- <br />tics. Premining sampling at Trapper Mine will continue over the next 3 to 5 <br />years to determine site specific growth patterns within the proposed permit <br />area. <br />2-178 <br />