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• selected in the spring. Because this grass can retain its succulence well, it is selected before other <br />grasses later in the growing season (Plummer, et.al., 1968). <br />The USDA Soil Conservation Service (1977) recommends that Russian wildrye be included in a seed <br />mix for Zone VII which corresponds to the lower elevations and western portions of Trapper Mine. <br />The Vaughan-Jacklin Corporation describes Russian wildrye as a cold and drought hardy cool season <br />bunchgrass. It tends to be better adapted to salty or alkali soils than crested whealgrass. <br />Range Site A <br />The high elevation range site (A) is similar in location to what the SCS call climatic zone VIII. For <br />revegetation purposes, all mountain shrub type found above approximately 7200 feet will be seeded <br />and/or transplanted according to the species mix found in Table 3.6-9. All seeding and/or transplanting <br />will generally occur in the fall. Where circumstances or conditions warrant, the same activities may be <br />carried out in the spring of the year. <br />• The introduced plant species in this mix include fairway wheatgrass, Agropvron cristatum; tall wheat - <br />grass. A. elonnatum; pubescent wheatgrass, A. trichophorum; smooth brome, Bromus inermis; sicklepod <br />milkvetch, Astragalus cicer, alfalfa, Medicago sativa; alsike clover, Trifolium hvbridum; and white clover, <br />T. repens. Tables 3.6-1a through 3.6-1e and 3.6-2a through 3.6-2e provide a complete evaluation of <br />species characteristics. A discussion of the utility of each species not previously discussed for range <br />sites B or C follows. <br />Temporary Disturbance Areas <br />Besides the expected seeding of regraded and retopsoiled spoil piles, other temporary seedings are <br />required. These include such areas as development drill sites, diversions, roadsides, sediment dams <br />and <br />3-141 a//y/q-7 <br />