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Section 779.19 (a) Continued. <br />• Soils. Soils are moderately deep and well drained, with a moderate <br />erosion hazard. <br />Vegetation. Presently, this site supports very few plant species. <br />Vegetation cover is 53% composed of 41% grasses, 7% forbs, and 3% <br />shrubs. Total ground cover is 91 percent. Production is 2014 <br />pounds per acre; 90% grasses, 8% forbs and 2% shrubs. <br />In some areas sagebrush has invaded. The major plant species is <br />smooth brome making up 78% of the total cover and 90% of the <br />production. Two of the 7 species encountered in this site are <br />included in the revegetation seed mixture. The remaining species <br />either have not proven useful or are not available for revegetation. <br />Cover <br />• Examination of Table 42, Comparison of Available Cover and Produc- <br />tion Data on Energy Mines No. 1 and 2 reveals that cover of each <br />range site remained relatively constant from 1975 through 1979. <br />Aspen cover ranged from 87 percent to 100 percent; big sagebrush <br />cover ranged from 83 percent to 92 percent; meadow cover ranged <br />from 93 percent to 99 percent; and low sagebrush cover ranged from <br />66 percent to 91 percent. Except for low sagebrush, these data <br />seldom varied over 10 percent during this time span. The greatest <br />year to year variation observed occured in low sagebrush site where <br />cover differed by some 25 percent between 1976 and 1977. In 1976, <br />cover was estimated from a one square foot frame and in 1977, a 10- <br />point frame was used. Some variations between these methods is <br />expected. However, considering the differences between methods and <br />the different observers, the amount of variation is actually low. <br /> According to the ranges sites sampled each year, the average cover <br /> for 1975 was 86.6 percent; for 1976 was 84.5 percent; for 1977 was <br />• 96.4 percent and for 1979 was 88.7 percent. These figures seemingly <br />779-126 <br />