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•page 9 <br />Tlic Rombo Boll Se moderately deep and cell drained. It formed in <br />~ -'~ <br />• eolluvium and residuum du rived dominantly from shale and eilta[one. <br />~ Typically the surface layer Ss channery clay loam. The subsoil to a depth <br />of 38 Snchce le channery clay loam. Weathered elate, elltetone, and coal <br />1 <br />Ss at a depth of 38 inches. The soil is slightly acid. Depth co bedrock <br />--' <br />ranges from 20 to 40 inches. <br />Permeability of the Rombo soil is moderately slow. Available water <br />capacity is moderate. Effective rooting depth is 20 to 40 inches. <br />Runoff is very rapid and the hazard of water erosion is very high. <br />The Travessilla soil is shallow and cell drained. It formed in <br />-- <br />• ~ <br />~y <br />residuum derived dominantly from sandstone. Typically the soil is channery <br />loam over sandstone bedrock at a depth of 13 inches. The soil is moderately <br />alkaline and calcareous. Depth to sandstone is 10 to 20 inches. <br />)rermeabilicy of the Travevssilla soil .is moderately rapid. Available <br />eater capacity is very low. Effective rooting depth is 10 to 20 inches. <br />Runoff is very rapid and the hazard of eater erosion is very high. <br />This unit is used for livestock grazing and woodland. <br />The potential plan[ community on the Louviers and Travessilla soils <br />is mainly pinyon and juniper with an understory of Indian ricegrass, <br />sideoats ~grama, mutton grass, and little blucstea. The average annual <br />production of air-dry vegetation is 400 pounds per acre. If the condition <br />of the unit deteriorates, pinyon, juniper, Gambel oak, and fringed sagebrusl~ <br />increase. Steepness of slope limits access by livestock and promotes over- <br />grazing of the less sloping areas. Trails or vallvays can be constructed <br />in places to encourage livestock grazing in areas where access is limited. <br /> <br />