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chroma of 3 through 6. Reaction is slightly alkaline or moderately alkaline. Carbonate content <br />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, and <br />chroma of 4 through 8. This horizon ranges from very fine sandy loam, loamy very fine sand, fine <br />sandy loam, sandy loam and is mildly alkaline to strongly alkaline. Carbonate content ranges from 0 <br />to 3 percent. <br />The Bk and C horizons have hue of 2.5YR through 7.5YR, value of 5 through 8 dry, and 4 through 8 <br />moist, and chroma of 4 through 6. This horizon ranges from very fine sandy loam, fine sandy loam, <br />or sandy loam, and thin strata of gravelly fine sandy loam, or loamy fine sand, below a depth of 40 <br />inches. Reaction ranges from slightly alkaline to strongly alkaline. Carbonate content ranges from 0 <br />to 5 percent. <br />COMPETING SERIES: These are the Ignacio (NM), Parida (NM), Remmit (CO), Sandspring (T <br />AZ), and Turnback (WY) series. Ignacio and Turnback soils have bedrock at depths of 20 to 40 <br />inches. Parida soils have more than 15 percent rock fragments in the particle -size control section. <br />Remmit and Sandspring soils have hue yellower than 7.5YR. <br />GEOGRAPHIC SETTING: Begay soils occur on fan remnants, structural benches and broad mesa <br />tops at elevations of 4,700 to 7,400 feet. Slopes are 0 to 30 percent. These soils formed in deep <br />eolian deposits and alluvium from sedimentary rocks. The climate is semiarid and the average <br />annual precipitation ranges from 8 to 14 inches. The mean annual temperature is 44 to 55 degrees <br />F. The mean summer temperature is 59 to 63 degrees F. and the freeze -free period ranges from <br />110 to 175 days. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the the competing Moepitz soils. Anasazi <br />soils have a calcic horizon and have a lithic contact at depths of 20 to 40 inches. Aneth soils do not <br />have cambic horizons and have a sandy particle size control section. Sogzie soils have calcic <br />horizons. <br />DRAINAGE AND PERMEABILITY: Well drained; very slow to medium runoff; moderately rapid <br />permeability. <br />USE AND VEGETATION: Used only as rangeland. Potential vegetation is needleandthread, big <br />sagebrush, blue grama, Indian ricegrass. <br />DISTRIBUTION AND EXTENT: Southeastern Utah and northwestern Colorado. Begay soils are <br />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 Haplocambids. <br />Revised September 2010 (PRO6) Attachment 2.04.9 -3 -6 <br />