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moist, and chroma of 3 through 6. Reaction is slightly alkaline or moderately alkaline. <br />Carbonate content ranges from 0 to 3 percent. <br />. The Bw horizon has hue of 2.5YR to 7.5YR, value of 4 through 6 dry, 3 through 5 moist, <br />and chroma of 4 through 8. This horizon ranges from very fine sandy loam, loamy very <br />fine sand, fine sandy loam, sandy loam and is mildly alkaline to strongly alkaline. <br />Carbonate content ranges from 0 to 3 percent. <br />The Bk and C horizons have hue of 2.5YR through 7.5YR, value of 5 through 8 dry, and <br />4 through 8 moist, and chroma of 4 through 6. This horizon ranges from very fine sandy <br />loam, fine sandy loam, or sandy loam, and thin strata of gravelly fine sandy loam, or <br />loamy fine sand, below a depth of 40 inches. Reaction ranges from slightly alkaline to <br />strongly alkaline. Carbonate content ranges from 0 to 5 percent. <br />COMPETING SERIES: These are the lynacio (NM), Parida (NM), Remmit (CO), <br />Sandspring R AZ), and Turnback (WY) series. Ignacio and Turnback soils have bedrock <br />at depths of 20 to 40 inches. Parida soils have more than 15 percent rock fragments in <br />the particle-size control section. Remmit and Sandspring soils have hue yellower than <br />7.5YR. <br />GEOGRAPHIC SETTING: Begay soils occur on fan remnants, structural benches and <br />broad mesa tops at elevations of 4,700 to 7,400 feet. Slopes are 0 to 30 percent. These <br />soils formed in deep eolian deposits and alluvium from sedimentary rocks. The climate is <br />semiarid and the average annual precipitation ranges from 8 to 14 inches. The mean <br />annual temperature is 44 to 55 degrees F. The mean summer temperature is 59 to 63 <br />degrees F. and the freeze-free period ranges from 110 to 175 days. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the Anasazi, Aneth and Sogzie <br />soils and the competing Moepitz soils. Anasazi soils have a calcic horizon and have a <br />• lithic contact at depths of 20 to 40 inches. Aneth soils do not have Iambic horizons and <br />have a sandy particle size control section. Sogzie soils have calcic horizons. <br />DRAINAGE AND PERMEABILITY: Well drained; very slow to medium runoff; <br />moderately rapid permeability. <br />USE AND VEGETATION: Used only as rangeland. Potential vegetation is <br />needleandthread, big sagebrush, blue grams, Indian ricegrass. <br />DISTRIBUTION AND EXTENT: Southeastern Utah and northwestern Colorado. Begay <br />soils are moderately extensive. MLRA 34, 35 and 48A. <br />MLRA OFFICE RESPONSIBLE: Phoenix, Arizona <br />SERIES ESTABLISHED: San Juan County, Utah, 1976. <br />REMARKS: These soils have been correlated to semidesert range sites in Utah. <br />Diagnostic horizons and features recognized in this pedon are: <br />Ochric epipedon -from 0 to 3 inches (A horizon). <br />Cambic horizon -from 3 to 16 inches (Bw horizon). <br />The Bk horizon is assumed to have too little carbonate to be a calcic horizon. <br />In December 1994 the classification was changed from Ustollic Camborthids to Ustic <br />Haplocambids. <br />• (REVISED 9/99) 2.04.9-30 <br />