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• top-ranking species were smooth brome (9.6 percent cover; 95 percent <br />frequency), orchard grass (5.2 percent cover; 95 percent frequency), <br />intermediate wheatgrass (2.1 percent cover 60 percent frequency), and <br />American vetch (Vicia americans) (0.8 percent cover; 65 percent <br />frequency). These five species accounted for approximately 86 <br />percent of the total species cover (Table 24). Total vegetation <br />cover was approximately 36 percent and was greater than either of the <br />sampled reference areas. Cover by bare sail was 2.5 percent. <br />Species density was 9.15 species per square meter. <br />Total production in the areas seeded in 1980 was 344.5 g/m2 with <br />alfalfa accounting for 32 percent of the total (Table 25). <br />Introduced perennial grasses accounted for 51.8 percent of the total <br />and native cool season perennial grasses accounted for 14.1 percent <br />• of the total production. Total production was approximately three <br />times greater in the 1980 areas compared with either of the sampled <br />reference areas. <br />Shrub density on the areas seeded in 1980 was 1020 shrubs per <br />hectare (413 shrubs per acre). gig sagebrush and mountain snowberry <br />accounted for most of the shrub density (Table 26). Shrub density <br />values are comparable to values obtained for other reclaimed areas on <br />the Seneca II Mine. <br />Areas Seeded in 1981. The areas seeded in 1981 (Figure 7) were <br />seeded with the mix listed~in Table 27. The 1981 seed mix represents <br />a change over the seed mixes used in earlier years. Also, fall 1981 <br />was the first year that a rangeland grass drill was used to seed the <br />reclaimed areas. In 1981 a greater emphasis was placed on native <br />. species and a reduction was made in the seeding rates for introduced <br />55 <br />