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<br />Tne Ranbo soil is moderately deep and well drained. It formed in <br />colluvium and residuum derived dominantly fro+n shale and siltstone. <br />'typically, the surface layer is channery clay loam 6 inches thick. Tne <br />subsoil is channery clay loam 32 inches thick. weathered slate, siltstone, <br />and coal are at a depth of 38 inches. The soil is slightly acid. Depth to <br />bedrock ranges from 20 to 40 inches. <br />Permeability of the Id~rtibo soil is,} slow. Available water <br />capacity is moderate. Effective rooting depth is 20 to 40 inches. Runoff <br />is very rapid, and the hazard of water erosion is very high. <br />The Travessilla soil is shalla+ and well drained. It formed in <br />residuum derived dominantly from sandstone. 'typically, tt~e soil is <br />channery loam, 13 inches thick over sandstone. The soil is moderately <br /> <br />• alkaline and calcareous. Depth to sandstone ranges fran 10 to 20 inches. <br /> Permeability of the Travessiila soil is moderately rapid. Available <br />water capacity is very low. Effective rooting depth is 10 to 20 inches. <br />Runoff is very rapid, and the hazard of water erosion is very high. <br />This unit is used for livestock grazing and as ~.oodland. <br />Tne potential plant ocrmwnity on the Louviers and TYavess>.lla soils is <br />mainly pinyon and juniper with an understory of Indian ricegrass, sideoats <br />grams, muttongrass, and little bluestem. The average annual production of <br />air-dry veyetation is 400 pounds per acre. If tl~e wndition of the unit <br />deteriorates, pinyon, juniper, Gambel oak, and fringed sagebrush increase. <br />The potential plant oomnunity on the lmmbo soil is big bluestem, little <br />bluestem, juniper, western wheatgrass, and needleandthread. The average <br />annual production of air-dry vegetation is 1,150 pounds per acre. If the <br />• condition of the range deteriorates, Gambel oak, pinyon, and juniper <br />increase. <br />211 <br />