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<br />-A1[van loam 0 to 1 ocrcent slopes ~ f~" t~ <br />This is a deep, well drained soil on terraces ~t elevations of 4500 <br />to 4900 fee[, It formed Ln old alluvium from material deposited by <br />the major rivers in the wes[euA'part of the su n•oy area. <br />Included in this unit are some soils with clay loam subsoils and some <br />soils with evidence of poor drainage. Also included arc some long <br />narrow streaks of sand and gravel cleposits. <br />Typically tl+e surface layer is grayish brown lo:~m about LO inches <br />thick. The subsoil is brown to l~g}+t yellowish brown clay loam and <br />sandy clay loam about 15 inches thick. Tl+e substran+m is calcareous <br />loamy sand or sandy loam about G filches thick o~,~r sand and gravel. <br />Depth to sand and gravel ranges from 20 to 40 iii:li~s. <br />Permeability is moderate and available water ca;~•+iity is m,+d.~rate. <br />Effective rooting depth ~s 20 to 40 inches. S++rface runoff is slow <br />and erosion l+azard is low. <br />This soil is used almost entirely for irrigation anJ is sui[cJ to <br />all crops adapted to this area, including corn, s++~ar be ts, beans, <br />alfalfa, small grains, potatoes and onions. An e~.;irple of a suitable <br />cropping system is alfalfa 3 to 4 years folluwrJ by corn, corn for <br />silage, sugar beets, small grain, beans and hark to alfalfa. Tl+e <br />soil normally has some slight restricCions for sore crops such as high <br />clay content or rapidly permeable st+hstratums. <br />All methods of irriga[Lon are suitable with fu+rcw irri~ntinn the most <br />common Eype used, proper irrigation G•ater man:+~rr~an[ is essential. <br />