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these elements can be added. It is not anticipated severe problems will appear as a result of nutritional deficiencies because the soild is normally of good productive capabilities. If soil has been spread a considerable period prior to seeding and compac- tion has occurred, the area to be seeded will be disced prior to seeding. This will help insure adequate establishment. • The Soil Conservation Service report prepared in 1977 recommended the area be seeded with one pound Blue Grama and 9.5 pounds of Side-oats Grama, pure live seed rates per acre. Although not a bad recommendation, the lack of diversity in the mixture leaves something to be desired. In 1979, the areas to the south of pits 1 and 2 were seeded with these two species plus Little Bluestem, Russian wildrye, and Annual Rye. The latter three have not shown a great deal of success while the gramas have taken we1Z. The native vegetation is primarily of Blue Grama, Side-oats Grama and some Little Bluestem and Big Bluestem along with the undersirable Three-awn grass. Wheatgrasses also provide excellent Grover where they occur but may be presently reduced in quantity due to prior overgrazing impacts. • From this evidence, it is proposed the gramas be continued, the Little Bluestem reduced, and to provide a faster cover and dense sod wheatgrasses be added. A legume is also added to help re-establish nitrogen cycling. The following mixture will be planted on all areas. CDC/~TCC RATE (HPIS/ACRE - DRILLED RATES) Blue Grama Side-oats Grama Little Bluestem Western Wheatgrass Streambank Wheatgrass Intermediate Wheatgrass Yellow Sweetclover 1 2 0.5 3 2 3 0.5 12.0 Topsoil stockpiles will not generally be in place very long once the operation is fully coordinated, but those that are will need to be seeded to • protect them. These will be seeded with the following mixture. The seed will be broadcast. SPECIES RATE (HPLS/ACRE - BROADCAST RATE) Intermediate Wheatgrass 5 Russian Wildrye 4 Yellow Sweetclover 1.25 10.25 In this mixture, the Yellow Sweetclover will provide some organic nitrogen when the soil is replaced and the grasses will provide some protection. Some carryover into the final seeding via vegetative and reproductive propagules • will occur, but it should amount to not more than about 10~ of the final mixture thereby not causing unnecessary and undesirable imbalance in the final seed mixture. Mulch will be applied on south and west facing slopes. The mulch will be straw crimped in and applied at the rate of 2000 pounds per acre. Mulched areas will receive an extra 25 pounds of N per acre to allow for nitrogen utilization -4-