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2.04.9 L <br /> Page 28 of 46 <br /> A I A Tobin <,; lt.y cluy loom, 1 to 2 perrucnL u 3 u p u s Thin deep, <br /> wuJl drained rail in on flood plain:;. It formed in alluvium derived <br /> dominantly from fine textured materials. Slope is 1 to 2 percent. <br /> The native vegetation is mainly grass. Elevation s 5, 500 to 7,200 <br /> feet. The average annual precipitation is 15 to 17 inches , the average <br /> annual air temperature is 47 to 50 degrees F. , and the average frost- <br /> Prue sc,.,;on is 130 to 150 days . <br /> Typically, the surface is silty clay loam about 21 inches, thick . <br /> 4Y <br /> The next layers to a depth of 60 inches or more arivility clay loam. <br /> The soil is mildly alkaline to a depth of 21 inches and moderately <br /> 71 alkaNne below that, depth. <br /> Included in Ws unit are areas with a thinner dark surface layer. <br /> Ly moderately Sl (-)%..'. Available water capacity is high. <br /> paqwlf in slow and AP hazard of wA C"nann u; high . <br /> vust ?r use r3 For rangeland . A few areas are wcPH for <br /> The potential plant community on this unit is mainly wnskorn <br /> nrw 020P gr=P , Wfffalo _Q;-�!ss , naL. va K! it.grannus , and <br /> 11 -erasn . The Average , nnuai prod,i_­_iun ofuc <br /> P: nnv , crOPOY,qs , and curlycqp gumweed incr��ase. Ranj'(�- sct-fding is <br /> suitable if the ;-;:nge is in poor condition. <br /> If this unit is used for hay and pasture, the main limitations <br /> are slow permeability and the high degree of water erosion. Leveling <br /> J helps to insure the uni i arm application of water. Because of the slow <br />