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-- <br />i <br />.~ <br />~- <br />RS-CD-Falfa loam, '~ to 12 percent elopee <br />This is a deep, well drained soil on gentle eloping to eloping <br />mesa tops. It formed in aeolian materials from redbed deposits. <br />T}~e average annual precipitation ie about 1~ inches. The average <br />arv~ual air ternpcrature ie about 47 degrees. The average frost <br />free season is 90 to 115 days. <br />Typically, the surface layer is reddish gray loam about 4 inches <br />thick. Most cultivated fields have a clay loam surface layer. <br />The upper part of the ,sub soil is reddish brown clay loam about <br />~~ <br />8 inches thick. The lower part of the subsoil is reddish brown <br />clay about 58 inches thick. The substratum is pink loam to a <br />depth of 6o inches or more. <br />Included in this unit is about 25 percent Corta soils and small <br />areas of Witt and Mobridge loans. <br />Permeability is slow, and effective rooting depth is 60 inches <br />or more. Available water capacity is high and erosion hazard <br />is moderate. <br />This soil is used mainly for irrigated crops, nonirrigated crops, <br />and range. The main crops grown in irrigated areas are corn for <br />ensilage, small grains such as wheat, barley, and oats and alfalfa <br />hay. The main crop grown under dryland conditions is winter wheat. <br />7n irrigated areas the primary concerns of management are controlling <br />erosion by water, maintenance of organic matter and proper use of <br />