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<br />1/76 <br />Forelle Series (Borollic Haplargid, fine loagy mixed) <br />The Forelle aeries consists of deep, cell drained Boils that <br />forme3 in aeolian deDCSit. Forelle soils are on gently eloping to <br />steep uplands and have slopes of 3 to 25 percent. The mean annual <br />precipitation ranges from 12 to 15 inches and the mean annual Boil <br />temperature is 42 to 47°F. . <br />Forelle soils are similar to Evanston and Rock River soils. <br />Evanston soils have a mollic epipedon. Rock River contains more <br />than 50 percent fine or coarser sand in the control section. <br />• Typical pedoa of Forelle loam, 3 to 12 percent slopes, ie located <br />t 1,320 feet west of SE corner Sec. 32, T.7N, R,90W.: <br />Ap-0 to 5 inches; grayish brown (lOYR 5/2) loam, very dark <br />grayish brown (lOYR 3/2); weak fine granular sti^SCture; slightly <br />hard, friable, slightly sticky and slightly plastic; mildly alkaline <br />{pH 7.4); clear smooth boundary. (4 to 6 inches thick) <br />Bl-5 to 10 inches; light brownish gray (lOYR 6/2) loam, dark <br />C, <br />J <br />grayish brown (lOYR 4/2) moist; weak coarse subangular blocky structure <br />Lh?'v ra.a L3 ~+ wUQei aLo medium `ollbangtiidr s:iOCtiJ; 3'_ightly ti'SS'd, <br />friable, slightly sticky and slightly plastic; mildly alkaline (pH <br />7.4); clear smooth boundary. {4 to 8 inches thick) <br />i <br />l <br />\~ <br />