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• ~~ 74-Torriorthenls•Haplargids complex, very stony. The soils in This complex zre nearly level to strongly sloping and are on toe slopes and small tans and in narrow, winding valleys. They are forming in 2n accumu- lation of locally vansported stony materials derived from e variety of rock. Slopes are 0 to 12 percent Torrionhenls make up about 55 percent 01 Ih:s com~ plex and are lower on the toe slopes than Haplargid; and are in the bottom of small drainageways. Haplarg:ds make up about 40 percent. They are more sloping than Torriorthents and ere on toe slopes and tans. Included with these soils in mapping are areas of Flu- vents, hooded, that make up 5 percent of this map unit. Tornorthenis ere deep and well drained. They hzve Gtlle or no profile development. The surtace layer ranges Irom sandy loam to clay loam and is ver)• stony. The underlying layers are sandy loam, loam, or clay loam and have wbbles, stones, and boulders. Content of rock fragments in the profile exceads 35 percent. Permeabiliry of the Torriorthents is rap'itl to mode: ale;y slow. Available water capacity is moderate to lov+. Rcots penetrate to fl depth o1 60 inches or more. Surtzce runoll is moderate. Tne stony surtace layer helps to prevent erosion. Some areas are subject to rare lloodrng. Haplargid; are deep and well drained. These soils are highly variable, end profile development is wax%: to motl- erate. In some areas a thin, dark colored surface lave: is forming. The surface layer most commonly is loam or sandy loam and is very stony. The subse,il is loam, clay Loam, or light clay and hzs cobbles and Stones. Content of rock Iragments exceeds 35 percent. Permeability of Haplargitls is moderate fo modara:ely slow. AvailaLle water capacity is moderate to lov+. Root- ing depth is 60 inches or more. Surlace runoll is medium. The stony surtace layer harps to prevent e: o~ lion. Some areas are subject to rare flooding. Because o1 sudace stoniness and slopa, These so:!s ere unsuiL=d to crops. Seed'oed prepzra;ion and dri?~.ng 01 seed for pasture plantings on depleted native rangz or in cleared areas are gene: ally not practical bzcause of Surtzce stoniness. A limited degree of success can be expected by broadcasting seed late in summer or early in fall. Siberian wheatgrass, western wheatgrzss, Indian ricegrass, and crested wheatgrass are adapted specses Good pasture management must be practiced to protest the soils Irom erosion end to provida grazing for Iwe- stock. These soils provide habitat for desert cotrontai, mourning dove, and chukar. Water development; can be used to improve wildlile Itabilat. II these Soils are used for urban development, fh4 main limitations are stoniness and ovenlow. Tnese timita~ lions can be Overcome by the use of proper design and construction methods. This complex is in r2pabiliry subclass Vlls, nonirriget- ed. 75-Torriorlhents-Rock outcrop, sandstone, com- plex. This broadly delined map unit consists of moder- ately sleep to very sleap soils and Rock outcrep on mountainsidzs and IOOI slopes Torrionhenls make up about 60 percent of the map unit, antl sandslonz rock outcrops make up about 30 percent (lig 7). Slopes are 20 l0 70 percent. Torriorthents most commonly occur in the less sloping areas end are lower on the toot slopes than the rock outcrops. The sandstone rock outcrops gen^_rally are steeper than the Torriorlhents. Rock escarpments com- mo:ply occur on the upper pan of the stopas. Included with this complex in mapping ere small areas of Kech and Progresso soils and Fluvents, flooded. Torrionhenls are well drained. Depth to bedrock ranges Irom 10 to more than 60 inches. The deeper Torrionhenls are near the bottom of the slopz. Tha su~- lace layer is generally loamy and is vary stony, b=_cause rocks r+ealhered from escarpments ere carried dov;ns- lope by gravity. The underlying layers ere sandy loam or loam and hava a high content of rock Iragments. Stones that are many feet in diameter are common. Permeability of Torriorlhents is moderate to rapid, and evailablz water capacity is moderate fo lov+. Daplh to edrock limits rooting depth, but tree roots commonly ¢enetrate fractures in the rock. Surtzce runoll is rapid. Surlace stoniness helps to prevent water erosion. Mass wasting is common in areas of this map unit. The Rock culcrop part of this complex consists of more than 90 percent exposed bedrock, principally sand- stone. It provides cover log wildlila and is used mainly for wildlile habitat and recreation. The soils in this complex have only limited valua for grazing and are used mainly for wildlile hzb~:zt and rec- reation. Vegetative cover is needed fo control runoll antl erosion. This map unit provides cover and escaoe fog wildlile. Dear commonly feed on the sunny slopes during v+inler. Because of sudace stoniness and Slope, the soils in this complex ere unsuited to crops and sezdb^_d prepa- ration antl drilling of seed for pzslure plantings on de~ plated native range or in cleared areas are gznerally not pracl~cal. A limited degree of success can be ezpacted by broadcasting seed late in summer or early in tall. Siberian wheatgrass, wes!ern wheatgrass, Indian rice grass, and crested wheatgrass are adapted species Good pasturz management must be practiced to p. elect the soil Irpm erosion and to provida grazing lo: I,veslo^_k. II this map unit is used (or urban devalopment, tha mar:~ soil limitations arc slope and stoniness. These limi- tations can bz rn~ercome by the use of proper design antl construction methods. Tnis complex is in capability subclass Vlls, nonirrigal~ Y,j, •