Laserfiche WebLink
C 18-22"+ Dark brown (7.SYR 3/2) moist, the gravel <br />is 60 to 75 percent of the horizon; massive; <br />loose; noncalrareous; this layer contains <br />much mica. Mast of the surface is covered <br />with gravel and cobble. In places rock <br />outcrop occurs. <br />Climatic Information <br />Average annual precipitation varies from 15 to 20 inches, but <br />may be as low as 12 inches if all other growth factors are <br />favorable. About 50% of this comes between May 1 and September <br />30. Hard, spotty rains are common in July and August, while <br />June is generally lacking in moisture. The optimum growing <br />season for the major native plants is May 15 to August 15. <br />Native Vegetation <br />Bunchgrasses give this site a grassland aspect. The dominant <br />grasses are Arizona fescue, mountain muhly, June grass, Parry <br />oatgrass and pine dropseed. Other grasses that may occur are <br />western wheatgrass, nodding brome, squirred tail, needlegrasses, <br />native bluegrasses, sheep fescue, blue grama, and sedges. <br />Common forbs found in the plant community include yarrow, <br />lupine, pentstemon, American vetch, golden pea, buckwheat, and <br />bluebell. Shrubs such mountain mahogany, snowberry, skunkbrush, <br />current, and gooseberry may appear as scattered and isolated <br />plants, especially on the shallow rocky areas. <br />Native Vegetation found at the Hall Gulch site and the estimated <br />species composition are: <br />Fringe Sage 35% <br />Muhly's 25% <br />June Grass T <br />Snake Weed 10% <br />Hairy Golden Aster 5% <br />Squirrel Tail T <br />Ring Muhly 5% <br />Arizona Fescue 10% <br />Schurby Anquifoil T <br />Range condition at this site is poor. <br />Total Annual Production <br />Favorable years 900 <br />Unfavorable years 500 <br />Median years 700 <br />pounds per acre air dry <br />n n n u n <br />n n n n n <br />