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30 so>z, stlavEY LaltLarand fine sandy loam, 3 to 25 percent slopes. This soil is on glacial terraces, fans, and moraines in the southern part o! the survey area. Slopes range from 3 to 25 percent but axe mostly 3 to 15 percent. Tlus soil has the profile described as representative of the series. Included with this soil in mapping are a few small rock streams in slightly higher or steeper areas and small areas of Troutville and Cowdrey soils in low drainagewaya, Runoff is medium. The hazards of soil blowing and water erosion are moderate. Most of the acreage of this soil is in forest. A small acreage is cleared and is used for grazing. Capability unit VIe~I, nonirrigated;not placed in a range site. I.eF-~I.srsnd fine sandy loamy 25 to 40 percent elopes. This soil is on glacial moraines and steep areas on fans in the southern part of the survey area. Included with this soil in mapping are a few small areas of Troutville soils, rock streams adjacent to drainage channels, and a few areas in which rock makes up a large amount of the susface area. Runoff is medium. The hazard oP soff blowing is moderate, sad the hazard of water erosion is high. Most of the acreage of this soil is in forest. Ca- pability unit 'V1Ie-2, nonirrigated; not placed is a range site. Leavitt aeries The Leavitt series consists of deep, well drained soils that formed in glacial outwash sad old alluvium. They are on alluvial fans sad sides of valleys between elevations of 8;200 and 9,200 feet. Slopes are 2 to b percent. The native vegetation is mainly Idaho fescue, ..., wheatgrasses, Sandberg bluegrass, needlegrasses, five brome, junegrass, sedges, squirreltail, and sage (fig. 7). The mean annual precipitation is 15 1 inches, the mean annual air temperature is 34° to F, and the fmst_#ree season is 30 to 40 days. In a representative profile the surface layer is grayish brown loam about 9 inches thick. The upp inches of the subsoil is dark brown loam, the midd] inches is brown light clay loam, and the lower 9 in is light yellowish brown light clay loam in which hav accumulated. The underlying material is light lowish brown loam. Permeability is moderate, and available water pacify ie high. These soils are used mainly for grazing. Some s: are used for irrigated hay and pasture. Representative profile of Leavitt loam in as grass, center of sec. S, T. 7 N., R. 78 W.: Al-0 to 9 inches; dark grayish brown (leYR 4/2) 1. very nark bzova (lots Y/2) moist- weak r platy structure parpn~ to moderate medium cn: soft, very iriaDle, shghYly sticky and nonppla many fine roots; neutral; clear smooth boundar 81-9 to 13 inches; dark brown (TOYS 4/3) loam, . brown (10YS 3/31 moist: moderate medimn subangolar blocky; slightly hard, friable, slig sticky and nonpb;atiC; many flue and medium ro thin patchy clay flbna on pads and in pores; 5 cent grarel• neutral; clear smooth boundary. 82tr-1s to 28 inches; brown S~ Ylt s/s) ltaaht~~ m d dark brown (10YR S moist; mod prismatic structure parting to moderate mad aubangular blocky; very bard, friable, sticky plastic; few fine roots; thin nearly continuous , 51ms on peels; 5 percent fine gravel; neutral; g: Pismo 7.-Area of I.mvitt loam.