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• <br />• <br />• <br />varieties. <br />Seed availability problems associated with the above recommended varieties <br />will require that the next best adapted variety or native /common types be used. The <br />alternate selections will be made from regional sources. <br />Species selection criteria centered on species that are drought tolerant, reasonably <br />productive under semi-arid conditions, able to provide site stabilization, able to <br />withstand grazing pressure, and have utility for livestock and wildlife. The hybrid <br />wheatgrass variety Hycrest is a recently developed cultivar that has better establishment <br />and production than other Agropyron cristatum and Agropyron desertorum varieties. Paiute <br />orchardgrass, another recently developed cultivar, has been developed for semi -arid <br />conditions as low as 12 inches of annual precipitation, while retaining good forage <br />quality attributes. Bozoisky-Select Russian wildrye, yet another recently released <br />cultivar, was selected for improved seedling vigor and increased forage yields over other <br />varieties. Ruebens Canada bluegrass has been included in the mix to provide site <br />stabilization benefits. Spredor 2 prostrate alfalfa is included as a nitrogen fixing <br />legume that will also improve forage quality. The contribution of alfalfa to the stand is <br />only about 8 percent (based on seeds /ft <br />All species are introduced, however these are the best available species for the postmine <br />land use and are necessary and desirable to achieve the intended use. <br />Site Variation Adaptability of Seed Mix #8: <br />Dry Sites: All species. <br />Moist Sites: Agropyron hybrid, Dactylis, Medicago, Poa. <br />Coot Season: Agropyron, Elymus, Poa, Dactylis. <br />Warm Season: Medicago. <br />Fine Textured Sites: Agropyron hybrid, Dactylis, Elymus, Medicago, Poa. <br />Coarse Textured Sites: All species except Medicago. <br />Revegetation methods, including seedbed preparation and seeding, are similar to that <br />presented earlier in the revegetation plan discussion for the Nucla Mine. Exceptions <br />include the possible use of the grass drill specified in the irrigated pasture <br />revegetation discussion in lieu of the rangeland type drill and the use of cover crop for <br />surface stabilization only. No mulching is planned for these small areas, however, a <br />cover crop will be seeded as a surface stabilization measure. Management and maintenance <br />22 -27 Revised 07/25/91 <br />