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LOGAN COUNTY, COLORADO
<br />Dacono Series
<br />The Dacono series consists of deep, well drained soils
<br />formed in calcareous alluvial and eolian materials under-
<br />lain by sand and gravel. Dacono soils are on upland flats
<br />and ridges and have slopes of 0 to 5 percent. Average an-
<br />nual precipitation ranges from 17 to 19 inches and mean
<br />annual temperature is about 48 degrees F.
<br />The Dacono soils are similar to the Altvan and Platner
<br />soils. They are near the Altvan, Platner and Rago soils.
<br />Altvan soils have sandy clay loam B2t horizons. Platner
<br />and Rago soils lack sand and gravel at depths above 40
<br />inches.
<br />A typical pedon of Dacono loam is 2,490 feet north and
<br />15 feet west of the southeast corner of section 10, T.
<br />11N., R. 48W.
<br />Al -0 to 4 inches; grayish brown (10YR 5/2) loam, very dark grayish
<br />brown (10YR 3/2) moist; weak fine granular structure; slightly
<br />hard, friable; 5 percent gravel; neutral (pH 7.0); clear smooth boun-
<br />dary. (4 to 8 inches thick)
<br />131-4 to 7 inches; grayish brown (10YR 5/2) clay loam, very dark gray-
<br />ish brown (10YR 3/2) moist; weak medium prismatic structure;
<br />hard, friable; 5 percent fine gravel; thin continuous clay films on
<br />faces of peds; neutral (pH 7.0); clear smooth boundary. (3 to 6
<br />inches thick)
<br />B2t -7 to 13 inches; dark grayish brown (10YR 4/2) heavy clay loam,
<br />very dark grayish brown (10YR 3/2) moist; strong medium and fine
<br />prismatic parting to strong medium and fine subangular blocky
<br />structure; hard, firm; moderately thick, nearly continuous clay films
<br />on faces of peds; 5 percent gravel; mildly alkaline (pH 7.4); clear
<br />smooth boundary. (5 to 12 inches thick)
<br />113 -13 to 19 inches; light gray (10YR 7/2) silt loam, grayish brown
<br />(10YR 5/2) moist; weak medium prismatic structure; hard, friable;
<br />thin patchy clay films; mildly alkaline (pH 7.4); clear smooth boun-
<br />dary. (3 to 8 inches thick)
<br />Clca -19 to 28 inches; white (10YR 8/2) silt loam, light brownish gray
<br />(10YR 6/2) moist; massive; hard, friable; calcareous with visible cal-
<br />cium carbonate occurring as concretions and in thin seams and
<br />streaks; moderately alkaline (pH 8.4); gradual smooth boundary. (5
<br />to 12 inches thick)
<br />IIC2 -28 to 60 inches; light yellowish brown (7.5YR 6/4) stratified
<br />coarse sand and gravel, yellowish brown (7.5YR 5/4) moist; single
<br />grained; loose, dry and moist; mildly alkaline (pH 7.6).
<br />Thickness of the solum ranges from 15 to 24 inches. Depth to the con-
<br />trasting IIC horizon ranges from 20 to 40 inches. Rock fragments range
<br />from 0 to 15 percent in the solum.
<br />The A horizon has a color value of 4 or 5 dry, 2 or 3 moist, and
<br />chroma of 1 through 3. It is a loam or light clay loam. The 132t horizon is
<br />commonly heavy clay loam or light clay. The IIC horizon has a hue of
<br />10YR or 715YR.
<br />Dailey Series
<br />The Dailey series consists of deep, somewhat excessive-
<br />ly drained soils that formed in noncalcareous, eolian
<br />materials. Dailey soils are in upland valleys and on convex
<br />ridges and hills. Slopes are 0 to 9 percent. Average annual
<br />precipitation ranges from 15 to 19 inches and the mean
<br />annual temperature is about 48 degrees F.
<br />Dailey soils are similar to the Valent soils. They are
<br />near the Valent, Julesburg and Haxtun soils. Valent soils
<br />lack dark surface layers extending to 10 inches or more.
<br />Julesburg and Haxtun soils have B2t horizons.
<br />115
<br />A typical pedon of Dailey loamy sand is located 375
<br />feet east and 10 feet north of the southwest corner of
<br />section 21, T.9N., R.48W.
<br />Al -0 to 16 inches; grayish brown (10YR 5/2) loamy sand, very dark
<br />grayish brown (10YR 3/2) moist; weak fine granular structure; soft,
<br />very friable; neutral (pH 6.8); gradual wavy boundary. (10 to 20
<br />inches thick)
<br />C -16 to 60 inches; pale brown (10YR 6/3) loamy sand, brown (10YR
<br />5/3) moist; single grained; loose, dry and moist; neutral (pH 7.0).
<br />The mollic epipedon ranges from 10 to 20 inches thick. It is noncal-
<br />careous to a depth of 40 inches or more.
<br />The A horizon has a color value of 4 or 5 dry,2 or 3 moist, and
<br />chroma of 2 or 3. The C horizon is commonly a loamy sand but ranges to
<br />a sand.
<br />The thick surface phase mapped in this survey is a taaadjunct to the
<br />Dailey series. The mollic epipedon is thicker than 20 inches. The under-
<br />lying layers consist of buried A and B2 horizons and are loamy sand and
<br />sandy loam.
<br />Dix Series
<br />The Dix series consists of deep, somewhat excessively
<br />drained soils formed in very gravelly alluvial sediments
<br />with a thin mantle of loamy alluvium. Dix soils are on
<br />upland ridges and knolls with slopes of 3 to 25 percent.
<br />Average annual precipitation ranges from 15 to 19 inches
<br />and mean annual temperature is about 48 degrees F.
<br />The Dix soils are similar to the Peetz and Eckley soils.
<br />They are near the Peetz, Eckley and Chappell soils. Peetz
<br />soils are calcareous throughout. Eckley soils have B2t
<br />horizons. Chappell soils have sand and gravel at depths of
<br />20 to 40 inches.
<br />A typical pedon of Dix gravelly sandy loam is located
<br />900 feet south and 600 feet east of west quarter corner of
<br />section 29, T.11N., R.52W.
<br />A1-0 to 4 inches; dark grayish brown (10YR 4/2) gravelly sandy loam,
<br />very dark brown (10YR 2/2) moist; weak fine granular structure;
<br />slightly hard, very friable; 30 percent gravel and cobbles; neutral
<br />(pH 7.0); clear smooth boundary. (3 to 5 inches thick)
<br />132 -4 to 10 inches; dark grayish brown (10YR 412) gravelly coarse
<br />sandy loam, very dark grayish brown (10YR 3/2) moist; weak medi-
<br />um prismatic structure; hard, very friable; thin patchy clay films on
<br />faces of peds and in root channels; neutral (pH 7.0); clear smooth
<br />boundary. (3 to 9 inches thick)
<br />133 -10 to 18 inches; brown (7.5YR 5/4) gravelly loamy coarse sand, dark
<br />brown (7.5YR 4/4) moist; weak medium prismatic parting to weak
<br />medium subangular blocky structure; hard, friable; few thin patchy
<br />clay films on faces of peds; 40 percent fine gravel; neutral (pH 7.0);
<br />gradual smooth boundary. (2 to 8 inches thick)
<br />C1 -18 to 60 inches; reddish yellow (7.5YR 6/6) very gravelly sand,
<br />brown (7.5YR 514) moist; massive; slightly hard, very friable;
<br />neutral (pH 72).
<br />Thickness of the mollic epipedon ranges from 7 to 15 inches.
<br />Thickness of the solum ranges from 8 to 20 inches. Commonly these
<br />soils are noncalcareous in the area of the reddish Ogallala parent materi-
<br />als. In areas of more recent outwash deposits they have calcareous
<br />materials at 12 to 24 inches.
<br />The A horizon has a color value of 4 or 5 dry, 3 or 4 moist, and
<br />chroma of 2 or 3. It is gravelly sandy loam or gravelly loam.
<br />Eckley Series
<br />The Eckley series consists of deep, well drained soils
<br />formed in stratified, reddish colored, gravelly alluvial
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