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c Soil Survey Sar ' F4 0 to 2 percent slopes. the soils 193—Madera sandy loam, level soil is on low Included in this unit are small areas of Pentz This moderately well drained, nearly fox terraces. It is moderately deep to a hardpan. It formed unt expose bedrock. Also included are small areas of F��Ils that a e moderately deep and medium textured or in alluvium derived from granitic rock sources. In areas live cobbl and medium textured. The that have not been leveled, slopes are complex and the anare shallow and very Y p positions similar to hummocky microrelief, cluded are as are in landscape p landscape is characterized by lose of theLithic Xerorthents and the Toomes soil. The native vegetation is mainly annual grasses and lirn „zcluded areas make up 15 percent of the total acreage. fortis. Meandering drainageway s and closed wa' The Lithic Xerorthents are very shallow and are de ressions #i11 wi#h water to form vernal pools during apl the winter in many areas. l=levation is 60 to 150 feet, epi noderatel well drained or well drained. They formed in p is about 14 inches, ap.I Fnaterial weathered from hard, andesitic tuff breccia. The average annual precipitation Itoi Typically, bout 10 percent of the surface is covered h the average annual air temperature is about 61 degrees ani with stone and boulders. The surface layer is grayish p and the average frost-free period is about 275 days. the Typically, the surface layer is grayish brown and f,brown.co biy sandy loam about 3 inches thick. Light cos gray, hard, andesitic tuff breccia is at a depth of 3 brown sandy loam about 19 inches thick. to m The pper 4 inches. in some areas the surface layer is gravelly inches of the subsoil is brown sandy clay _ 1 crc I sandy loam or cobbly loam. next 6 inches is a claypan of light reddish brown clay. de ' F Permeability is moderate or moderately rapid in the. Xerorthents. Available water capacity is very low. The lower part to a depth of 60 inches is a pale brown ha Lithic Xer and brown, indurated, iron- and silica-cemented The effective rooting depth is limited by the bedrock at he .4 # 1 to 4 inches. Runoff is rapid, and the hazard hardpan. In sOme areas the surface layer is fine sandy ha F a depth W I of water erosion is moderate. or shallow and is included in this unit are small areas of Alamo soils in Me The Toomes soil is very shallow drainageways, Exeter and Jahant soils in landscape ea well drained. 1t formed in material weathered efro of the positions similar to those of the Madera soil, and su andesitic tuff breccia. Typically, about 2 p Veritas soils on the slightly higher parts of the dr. surface 's covered with stones. The surface layer and landscape. Also included are small areas of Madera an subsoil re pale brown and light brown loam about 15 soils that have slopes of 2 to 5 percent and areas k where depth to the hardpan is as little as 10 inches and sy I inches thick. Light gray, hard, andesitic tuff breccia is at or exposed a depth of 15 inches. In some areas the surface layer is most of the soil has been removed, altered, or^ i gravelly loam. as a result of deep leveling cuts. Included areas make fed ! Permeability is moderate in the Toomes soil. a about 15 percent of the total acreage. w. .'• Available water capacity is very low. The effective Lip is very slow in the Madera soil . rooting depth is limited by the bedrock at a depth of 4 to Available water capacity is low. The shrink-swell m � F20 inches. Runoff is medium, and the-hazard of water potential is high. The e#fective rooting depth is limited K chi erosio is slight or moderate. b the hardpan at a depth of 20 to 40 inches. Roots are a�, grazing. General Y sE This unit is used mainly for IN g g restricted to cracks and the faces of peds in the V management considerations include the very low cla an, which is at a depth of 10 to 25 inches. Water c� is brief) perched above the claypan and hardpan after a available water capacity, the limited depth, and the YP hazard of erosion. The Lithic Xerorthents support only a periods of heavy rainfall or irrigation. Runoff is ponded ,` m in the small vernal pools, is very slow or ponded in the tli spars stand of plants that are suitable for grazing, p _ F maim soft chess, toad rush, and hairgrass. The y Irl erfstic lent community on the Toomes soil is leveled areas, and is scow on the convex slopes. The chane # p hazard of water erosion is slight. The rate of water gal intake in irrigated areas is 1.5 inches per hour. The soil _ 3 F, soft chess, mouse barley, and filaree. The very low available water capacity limits the production of is not subject to flooding. �= Most areas are used for livestock grazing or far sp desirable forage plants. Fencing is difficult because of the limited depth to bedrock. Grazing should be irrigated pasture, irrigated crops, or vineyards. A few ;, q s areas are used for homesite' development. This unit . controlled so that desirable vegetation, such as soft g t. 1 chess, is maintained and enough vegetation is left may provide wetland functions and values. These standing to protect the soils from erosion. Loss of the shoulbe considered in plans for enhancement of surface layer results in a severe decrease in produce wildlife habitat or land use conversion. enPraix productivity and in the potential of the unit top Where this unit is used for livestock grazing, g plans suitable for grazing, management considerations include saturate erscoas The Th is map unit is in capability subclass Vile conditions in concave areas following rainy p '^ (ML A-18), nonirrigated. It is in vegetative sail group G.