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<br />brown (10YR 5/6, moist) mottles; massive; slightly
<br />hard to soft, very friable; mildly alkaline; gradual
<br />smooth boundary.
<br />IIC1 g-35 to 60 inches; brown (10YR 4/3) very gravelly
<br />loamy sand and sand, dark grayish brown (10YR
<br />4/2) moist; few medium distinct strong brown
<br />(7.5YR 5/6, moist) and yellowish brown (10YR 5/6,
<br />moist) mottles; 40 percent coarse fragments;
<br />neutral.
<br />The water table generally is at a depth of 18 to 48
<br />inches. The A horizon is calcareous in places. It has hue
<br />of 2.5Y to 7.5YR, value of 4 or 5 when dry and 3 or 4
<br />when moist, and chroma of 2 or 3 when dry or moist.
<br />Wormcasts are common in some areas. Mottles are few
<br />to many, fine to large, and distinct or prominent. Depth
<br />to the IIC1 g horizon ranges from 20 to 40 inches.
<br />Redrob Variant
<br />The Redrob Variant consists of deep, somewhat
<br />poorly drained soils on alluvial valley floors, flood plains,
<br />and low terraces. These soils formed in mixed alluvium.
<br />Slope is 0 to 3 percent. Average annual precipitation is
<br />about 18 inches, and average annual air temperature is
<br />about 38 degrees F.
<br />These soils are fine-loamy over sandy or sandy-
<br />skeletal, mixed Typic Cryaquolls.
<br />Typical pedon of Redrob Variant loam, 4.5 miles east
<br />of Buford, in the SE1 /4SW 1 /4 of sec. 25, T. 1 N., R. 91
<br />W.
<br />A1-0 to 3 inches; very dark gray (10YR 3/1) loam,
<br />black (10YR 2/1) moist; moderate fine subangular
<br />blocky structure parting to moderate fine and very
<br />fine granular; soft, very friable, sticky and plastic;
<br />slightly acid; clear smooth boundary.
<br />132-3 to 15 inches; very dark gray (10YR 3/1) loam,
<br />black (10YR 2/1) moist; strong very fine subangular
<br />blocky structure parting to strong very fine granular;
<br />slightly hard, very friable, sticky and plastic; many
<br />wormholes; neutral; clear wavy boundary.
<br />IIC1-15 to 26 inches; grayish brown (2.5Y 5/2) very
<br />gravelly loamy sand, dark grayish brown (2.5Y 4/2)
<br />moist; common prominent yellowish brown (10YR
<br />5/8) and brownish yellow (10YR 6/6) mottles; weak
<br />coarse subangular blocky structure; slightly hard,
<br />friable, slightly sticky and slightly plastic; 40 percent
<br />gravel; neutral; clear wavy boundary.
<br />IIC2-26 to 60 inches; brown (10YR 5/3) very gravelly
<br />sand, dark brown (10YR 4/3) moist; 60 percent
<br />gravel and 15 percent cobbles; neutral.
<br />Soil survey
<br />The A horizon has value of 2 to 4 when dry and 2 or 3
<br />when moist, and it has chroma of 1 or 2.
<br />The B horizon has hue of 5Y to 7.2YR, value of 2 to 5
<br />when dry and 2 to 4 when moist, and chroma of 1 to 3
<br />when dry or moist. The B2 horizon is 18 to 27 percent
<br />clay. Few mottles are in the lower part of the horizon in
<br />some pedons.
<br />The C horizon is more than 35 percent gravel and
<br />cobbles. The less sandy and gravelly layers are less
<br />than 10 inches thick.
<br />Redthayne series
<br />The Redthayne series consists of deep, well drained
<br />soils on mountainsides and toe slopes. These soils
<br />formed in colluvium derived dominantly from sandstone.
<br />Slope is 8 to 65 percent. Average annual precipitation is
<br />about 18 inches, and average annual air temperature is
<br />about 40 degrees F.
<br />These soils are loamy-skeletal, mixed Aridic
<br />Haploborolls.
<br />Typical pedon of a Redthayne channery loam in an
<br />area of Mergel-Redthayne-Dollard complex, 8 to 65
<br />percent slopes, 850 feet north and 400 feet east of the
<br />center of sec. 30, T. 2 N., R. 92 W.
<br />A1-0 to 8 inches; brown (7.5YR 5/2) channery loam,
<br />dark brown (7.5YR 3/2) moist; moderate fine and
<br />medium subangular blocky structure parting to
<br />moderate fine and medium granular; slightly hard,
<br />very friable, slightly sticky and nonplastic; 20 percent
<br />fine channery fragments; mildly alkaline; clear wavy
<br />boundary.
<br />62-8 to 18 inches; light brown (7.5YR 6/4) very
<br />channery loam, brown (7.5YR 4/4) moist; weak or
<br />moderate medium and coarse subangular blocky
<br />structure parting to moderate fine and medium
<br />granular; slightly hard, friable, slightly sticky and
<br />slightly plastic; 45 percent channery fragments and
<br />angular cobbles; calcareous; moderately alkaline;
<br />clear wavy boundary.
<br />Cca-18 to 60 inches; light brown (7.5YR 6/4) very
<br />channery loam, reddish brown (5YR 4/4) moist;
<br />weak medium and coarse subangular blocky
<br />structure; slightly hard, friable, slightly sticky and
<br />slightly plastic; 40 percent channery fragments and
<br />10 percent angular cobbles; few fine soft masses
<br />and seams of calcium carbonate; calcareous;
<br />strongly alkaline.
<br />The water table is between depths of 24 and 48 The texture of the B horizon ranges from loam to light
<br />inches throughout the year. The mollic epipedon is 7 to clay loam. The B horizon contains 35 to 60 percent coarse
<br />15 inches thick, Distinct or prominent mottles are in the fragments. The strongly contrasting material in the pedon
<br />lower part of the A horizon and in the B2 horizon. or bedrock is commonly at a depth of 60 to 72 inches.
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