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• 30 to 40 days during the summer and are dry in some part of the moisture control section for 60 to 90 consecutive <br />The A horizon has hue of 2.5YR through tOYR, value of 4 through 6 dry, 3 through 5 moist, and chroma of 3 <br />through 6. Reaction is slightly alkaline or moderately alkaline. 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, and chroma of 4 through <br />8. This horizon ranges from very fine sandy loam, loamy very fine sand, fine sandy loam, sandy loam and is mildly <br />alkaline to strongly alkaline. Carbonate content ranges from 0 to 3 percent. <br />The Bk and C horizons have hue of 2.SYR through 7.5YR, value of 5 through 8 dry, and 4 through 8 moist, and <br />chroma of 4 through 6. This horizon ranges from very fine sandy loam, fine sandy loam, or sandy loam, and thin <br />strata of gravelly fine sandy loam, or loamy fine sand, below a depth of 40 inches. Reaction ranges from slightly <br />alkaline to strongly alkaline. Carbonate content ranges from 0 to 5 percent. <br />days during winter and eady spring and are moist in some parts between July and October. <br />The combined thickness of the A and B horizons is 35 to 50 inches. The depth to secondary carbonates ranges <br />from 12 to 22 inches. The series particle-size control section ranges from 15 to 40 percent fine sand or coarser and <br />0 to 15 percent rock fragments. <br />COMPETING SERIES: These are the Ignado (NM), Parida (NM), Remmit (CO), Sandspring R AZ), and Tumback <br />(WY) series. Ignacio and Tumback soils have bedrock at depths of 20 to 40 inches. Parida soils have more than <br />15 percent rock fragments in the partice-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 broad mesa tops at <br />elevations of 4,700 to 7,400 feet. Slopes are 0 to 30 percent. These soils fonned in deep eolian deposits and <br />alluvium from sedimentary rocks. The climate is semiarid and the average annual precipitation ranges from 8 to <br />14 inches. The mean 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 the competing Mcepitz soils. Anasazi soils have a <br />celcic hodzon and have a lithic contact at depths of 20 to 40 inches. Aneth soils do not have Iambic horizons and <br />have a sandy partide size control section. Sogzie soils have celdc horizons. <br />DRAINAGE AND PERMEABILITY: Well drained; very slow to medium runoff; moderatey rapid permeability. <br />USE AND VEGETATION: Used only as rangeland. Potential vegetation is needleandthread, big sagebrush, blue <br />grams, Indian ricegrass. <br />• <br />(Revised March 2006) Attachment 2.04.9-3-7 <br />