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<br /> <br />-35- <br />~, The Capulin soil is deep and well drained. It formed in colluvium and <br />residuum derived dominantly fran basalt. Typically, the surface layer is <br />loam 7 inches thick. The subsoil is clay loam 23 inches thick. Zhe <br />substratum t4 a depth of 60 inches or unre is gravelly loam. Zhe <br />percentage of cobbles and gravel in the substratum increases with depth. <br />7rie soil is mildly alkaline in the surface layer and is moderately alkaline <br />and calcareous below the surface layer. <br />Pern~eability of the Capulin soil is moderate in the surface layer and <br />moderately slow in the subsoil. Available water capacity is high. <br />Effective rcotiny depth is 60 inches or more. Runoff is medium, and the <br />hazard of water erosion is moderate m very high. <br />This unit is used as rangeland. <br />The potential plant oo~mnunity on this unit is mainly blue grams, <br />~~ western wheatgrass, sideoats grams, big bluestem, and little bluestem. <br />Other less numerous plants are true mountainmahogany, Gambel ask, juniper, <br />and squirreltail. The average annual production of air-dry vegetation is <br />1,100 pounds per acre. If the condition of the range deteriorates, blue <br />grams, threeawn, juniper, and Gambel oak increase, Range seeding,is <br />limited by the large stones on the surface. <br />If this unit is used for homesite develognent, the main limitations are <br />large stones and slope in sane areas. <br />This unit is in capability subclass VIis, nonirrigated. About 50 <br />percent is in Basalt Breaks range site and 50 percent is in Loamy Plains <br />. ,. <br />range site. ' <br />~_ <br />