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muttongrass, Nevada bluegrass, and Letterman needle - <br />grass, to decrease and other plants, such as big sage - <br />brush, blue grama, and the less palatable forbs, to <br />increase. <br />Condition of the range vegetation can be improved, <br />and forage production increased, by use of planned <br />grazing systems, proper grazing practices, fencing, <br />and brush management where needed. <br />The estimated total annual production of air -dry <br />plant material ranges from 600 pounds per acre in poor <br />years to 1,000 pounds per acre in good years. About <br />400 to 650 pounds per acre is suitable forage for cattle. <br />The "Valley Bench" range site is described as follows: <br />Valley Bench range site <br />This range site is extensive. It is on benches and up- <br />lands. This site consists of deep to shallow, well drained <br />soils. The surface layer is moderately coarse textured. <br />Slope ranges from 0 to 30 percent. Permeability i8 mod- <br />erate or rapid, and available water capacity is low to <br />high. Winter is extremely cold, and summer is mod- <br />erately cool. Annual precipitation is 9 to 16 inches; <br />about three - fourths of this falls during the growing <br />season, This site is slightly more droughty than Dry <br />Mountain Loam range site. The dry growing season <br />strongly influences the kind and amount of potential <br />vegetation on this site. <br />This site has a scrubby big sagebrush aspect. The <br />potential plant community is 20 percent streambank <br />wheatgrass, 15 percent muttongrass, 10 percent june- <br />6 <br />