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The Forelle series are deep soils formed in alluvium derived <br />i locally from sedimentaty formations. They ae well-drained with <br />medium runoff and moderate permeability. Surface textures range <br />from sandy loam to very fine sandy loam. <br />Typifying pedon, Forelle very fine sandy loam: <br />Al (0-3") - Brown (lOYR 4/3) very fine sandy loam, dark brown <br />(lOYR 3/3) moist; weak fine granular structure; soft, very <br />friable nonsticky and nonplastic; many fine and very fine <br />roots; neutral (pH 7.0); clear smooth boundary. <br />B1 (3-7") - Brown (lOYR 4/3) very fine sandy loam, dark brown <br />(lOYR 3/3) moist; weak medium subangular blocky structure <br />parting to moderate fine granular; soft, very friable, <br />nonsticky and nonplastic; many fine and very fine roots; <br />few, thin discontinuous clay films on faces of peds; <br />neutral (pH 7.0); clear smooth boundary. <br />B2t (7-36") - Brown (lOYR 5/3) very fine sandy loam, dark brown <br />(lOYR 4/3) moist; weak medium prismatic structure parting <br />to moderate subangular blocky; slightly hard, friable, <br />slightly sticky and slightly plastic; many thin clay films <br />on faces of peds; many fine and very fine roots; neutral <br />(pH 6.7 to 6.6); clear wavy boundary. <br />• Cca (36-54") - Pale brown (lOYR 6/3) very fine sandy loam; brown <br />(lOYR 4/3) moist; massive; slightly hard, friable, slightly <br />sticky and slightly plastic; few fine and very fine roots; <br />calcareous, strongly effervescent, few fine soft rounded <br />masses, seams and threads of visible secondary calcium <br />carbonate; neutral (pH 6.7); gradual wavy boundary. <br />Range in characteristics: Depth to the base of the argillic <br />horizon is 20 to 40 inches. Depth to the base of the continuous <br />horizons of visible secondary carbonate ranges from 30 to 40 inches. <br />Gravel ranges from 0 to 15 percent in the C horizons. The Forelle <br />soils have less than 35 percent sand in the control section. Depth <br />to bedrock is greater than 40 inches. <br />Setting: The Forelle series are deep soils which have devel- <br />oped on broad alluvial fans and along drainageways. Parent material <br /> <br />-5- <br />