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5?,1 ? n Cyr r ?-- <br />iha <br /> <br />7/88 <br />X25A--Dobrow Variant-Becks Variant complex, D to 3 <br />percent slopes. This map\unit is on stream terraces and <br />flood plains. Elevation is 6,300 to 6,800 feet. The <br />0 vera3e.a'nnuil precipitation is 18 to 25 inches, the <br />avera3e..annual air- temperature is 37 to 40 degrees F, and <br />the average - flost-free period is 40 to Wdays.. <br />This unit is 60 percent Dobrow Variant so i I and 30 <br />'O.erylt Becks Variant soil. The components of this unit are <br />so .intricately intermingled that it was not, practical to <br />map them, separate l y, at the scale us'ed'. <br />Inc I ude& in this unit are sma I I areas of S i I as . Var i ant <br />sA(1 j,anjl: AgUents7Aquo l l s soils. Also • included in this : un i t <br />are areasradiacent to the stream which'have a common flood <br />hazard. <br />The Dubr6W#a&ant soil is deep and somewhat poorly <br />drained. It formed in alluvium derived from mixed sources. <br />Typically, the upper 11 inches of the surface layer- is very <br />dark grayish grown loam. The numt 6 inches is dark grayish <br />grown sandy loam. The lower- 7 inches is grayish grown loam. <br />The upper- 5 inches. of the under I y i n'g mater Q 1 is grayish <br />brown sandy loam. The lower part to a depth of 60 inches or <br />more is light yellowish brown extremely gravelly nand. ' <br />Depth to sand and gravel ranges from 20to 40 i riches. <br />Permeability of the Dobrow Variant soil is moderate to <br />a depth of 20 inches and rapid below this depth. Available <br />r <br />water- capacity is low. Effective rooting depth is 60 in . ches