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• Texture: loam, sandy clay loam, or clay loam (averages 18 to 30 percent clay). <br />Calcium carbonate equivalent: 15 to 40 percent <br />COMPETING SERIES: These are the Bisodi (T), Shalaco (T), and Wayneco (T) series. <br />Bisodi, Shalaco and Wayneco soils have less than 18 percent clay. <br />GEOGRAPHIC SETTING: Pinon soils are on knolls, ridges, mesas and hillslopes at <br />elevations of 5,500 to 6,700 feet. Slope gradients range from 1 to 30 percent. These <br />soils formed in alluvium and residuum derived from limestone. Pinon soils are in a warm <br />climate having mean annual temperature ranging from 49 to 56 degrees F., and a mean <br />summer temperature of 64 degrees F. Mean annual precipitation ranges from 10 to 15 <br />inches. The frost-free period is 130 to 170 days. In Colorado these soils have air <br />temperatures ranging from 45 to 48 degrees F. and have afrost-free period of 90 to 130 <br />days with elevations up to 7,400 feet. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dean and Deama soils and <br />the competing Harvev soils. Dean soils have 40 percent or more carbonate in the control <br />section and they lack a lithic contact within a depth of 20 inches. Deama soils have more <br />than 35 percent rock fragments in the particle-size control section. <br />DRAINAGE AND PERMEABILITY: Well drained; slow surface runoff; moderately slow <br />permeability. <br />USE AND VEGETATION: These soils are used primarily for livestock grazing. Native <br />vegetation is pinyon, juniper, grams grass and shrubs. <br />DISTRIBUTION AND EXTENT: Central New Mexico and southern Colorado. The series <br />is of moderate extent. <br />MLRA OFFICE RESPONSIBLE: Temple, Texas <br />SERIES ESTABLISHED: Valencia County (East Valencia Area), New Mexico, 1970. <br />REMARKS: DIAGNOSTIC HORIZONS AND FEATURES RECOGNIZED IN THIS <br />PEDON ARE: <br />Ochric epipedon -from the soil surface to a depth of about 7 inches. (A horizon) <br />Calcic horizons -the zone between 7 and 16 inches. (Bk1, Bk2 horizons) <br />Lithic contact -the occurrence of limestone at 16 inches. <br />National Cooperative Soil Survey <br />U.S.A. <br />• (REVISED 9/99) 2.04.9-51 <br />