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<br />Table 1. Historic premine range site herbaceous production, Trapper Mine, <br />1979-1985. <br /> Range Site Productions <br /> gms/meter sq. <br />Year A B C <br />1979(1) 41.71 21.26 35.79 <br />1980 73.44 50.97 64.79 <br />1981 81.05 55.53 56.52 <br />1982 109.98 77.00 64.08 <br />1983 89.60 75.50 136.24 <br />1984 95.23 80.13 135.84 <br />1985 83.40 75.28 95.02 <br />x 82.06 62.24 84.04 <br />S2 452.512 455.863 1563.836 <br />(1) 1979 herbaceous production data was calculated from 1979 total production <br />multiplied by the appropriate percentage of herbasceous production based <br />on soil conservation service (SCS) range site diescriptions. Trapper Mine <br />range sites A and B are similar in composition to SCS Brushy Loam range <br />site. The SCS Clayey Foothills range site is similar in compositiopn to <br />Trapper Mine's range site C. <br />(69.52 gms/m2, 1975 premine range site A total production) * (60% Brushy <br />Loam herbaceous production percentage) = 41.71 gms/m2 <br />(35.44 gms/m2, 1979 premine range site B total production) * (60% Brushy <br />Loam herbaceous production percentage) = 21.26 gms/m2 <br />(44.74 gms/m2, 1979 premine range site C total production) * (80% Clayey <br />Foothills herbaceous production percentage) = 35.79 gms/m2 <br />HBH/jb 6/87 <br />