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.. , _¢1 _ <br />3/BI <br />IfIID--?sag Iwo, 3 to 9 percent elopes. This deep, well drained <br />soil is on uplands and valley side slopes. It formed in alluvium derived <br />dominantly from sedimentary rock. The native vegetation is mainly grass. <br />Elevation is 6,500 to 7,800 feet. The average annual precipitation is <br />about 17 to 22 inches, the average annual air temperature is 47 to 50 <br />degrees F, and the average frost-free season is 90 to 120 days. <br />Typically, the surface Sayer is loam 6 inches thick. The upper I8 <br />inches of the subsoil is clay Loam. The Zower part is sandy clay loam 22 <br />inches thick. The substratum to a depth oaf 60 inches or Wore is Zoam. <br />The soil is neutral to a depth of 26 inches and mildly alkaline below that <br />depth. Depth to calcareous material ranges from 40 to 60 inches. <br />Included in this unit is ZS percent Trag sandy loam. <br />Permeability of this Noden soil is moderate to a depth of 39 inches <br />`"I and moderately rapid below that depth. Available water capacity is high. <br />Effective rooting depth is 60 inches or more. Runoff is medium, and the <br />hazard of'water ora~vion is medium to very high. <br />This unit is used as rangeland and Irrigated hayland. <br />The potential plant community on this unit is mainly western <br />wheatgtass, blue grams and little bluestem. Other Less mmerous plants <br />are Arizons fescue, prairie junegrass, and mountain mutely. The average <br />annual production of air~dry vegetation is 1,300 pounds per acre. If the <br />condition og the range deteriorates, aleepygrass, fringed sagebrush, red <br />threeawn, and pricklypear increase. Range seeding is suitable if the <br />range is in poor condition. <br /> <br />~_ <br />