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<br />-39- <br />8/82 <br />CpC-Capulin loam, 3 to 9 percent elopes. This deep, well drained <br />soil is on uplands on and near basalt capped mesas. It formed in alluvium <br />derived dominantly from basalt. The native vegetation is mainly grass. <br />Elevation ie 5,000 to 7,000 feet. The average annual precipitation is 15 <br />to 17 inches, the average annual air temperature ie 47 to 51 degrees P, and <br />I1,~ <br />the average frost-free season ie H'S to 160 days. <br />Typically, the s~u~rface layer is loam about 8 inches thick. The subsoil <br />is clay loam about 1+3 inches thick. The substratum, to a depth of 60 <br />iy <br />inches or more is gravelly loam. It is neutral to a depth of YL inches and <br />is moderately alkaline and calcareous below that depth. <br />Included in this unit is about 10 percent Torreon clay loam. Also <br />i <br />included are small areas of Ayon very etany loam and Apache very stony <br />loam. The Torreon soil is fine textured. The Ayon soil has more than 15 <br />percent rock fragments throughout the profile. The Apache soil hat basalt <br />at a depth of 20 inches or less. <br />Permeability of this Capulin soil is moderate. Available water <br />capacity is high. Effective rooting depth is 60 inches or more. Runoff Se <br />medium, and the hazard of water erosion is moderatg,. <br />This unit ie used mainly as rangeland. <br />The potential plant community on this unit is mainly blue grams and <br />westein wheatgrase. Other less numerous plants are squirreltail~ <br />needleandthread~and threeawn~ The average annual production of air-dry <br />vegetation is about 1,200 pounds per acre. If the condition of the range <br />deteriorates, blue grams, sand dropseed, threeawn, snakeweed, and <br />cheatgrase increase. Range seeding is suitable if the range is in poor <br />condition. <br />~.:- <br />