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7hls Gilt (nfonnstion Is not site <br />t+peclfic. Onslte Investigation, <br />tssting and analyst by competent <br />' personnel is needed before construc- <br />a/b9 <br />lion or other engineering use of soils. <br />~l 16--Cascauo vary gravelly sandy loam, 10 to 40 percent slopes. <br />Thi• deep, excessively drained soil i• on edges of stream terraces <br />deeply dissected by drainegeways. It formed in gravelly and sandy <br />alluvium. Tha native vegstat.ion is mainly grasses. Elevation is <br />5,000 to 5,400 feet. Th• average annual precipitation is 11 to 13 <br />inohes, the ^verag• annual air temperature i• 50 to 53 degrees F, end <br />the aversg• frost-free period is 150 to 170 days. <br />Typically, the surface layer is vary dark grayish brown vary <br />gravelly sandy loam about 6 inohs^ think. Th• upper 15 inohs• of the <br />substratum i• extremely cobbly sandy loam. Th• lower part to s depth <br />of 60 or more inohs• is extremely cobbly sand. Th• soil has a high <br />content of seoondary calcium carbonate between depths of 6 to 21 ' <br />inches. Th• soil i• moderately alkaline. <br />Included in this unit i• about 10 percent Midway stony clay loam <br />and S percent Shingl• vary stony fine sandy loam on steep side slopes. <br />Midway soils are clayey end shallow to shale, and Shingl• soils are <br />io:s.y :.:d shallow to sandstone. Also included is about 5 percent deep <br />Kim loam in drainageways. <br />Permeability of this Caacajo soil is modaratsly rapid to raid. <br />Available water capacity is low. Effective rooting depth is 60 <br />inches or more. Runoff i• rapid to vary rapid, and the hazard of <br />water •roelon i• high to vary high, <br />Thi• unit is used for rangeland. <br />Th• potential plant community on thi^ unit is mainly sideoats <br />grams, blue grams, little bluestem, Indian rieegrass, and <br />needleandthread. Tha avarag• annual production of air-dry vegetation <br />i is about 750 pounds per acre. If the condition of the range <br />~. <br />deteriorates, blue grams, red threeawn, ring muhly, and prieklypear <br />increase. <br />~G <br />