LOCATION DUTEK TXEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, active, thermic Arenic Haplustalfs
TYPICAL PEDON: Dutek loamy fine sand--wooded pasture. (Colors are for dry soil unless otherwise stated.)
A--0 to 8 inches; brown, (10YR 5/3) loamy fine sand, dark brown (10YR 4/3) moist; weak fine granular structure; loose, very friable; few roots; slightly acid; gradual smooth boundary. (4 to 20 inches thick)
E1--8 to 26 inches; light yellowish brown (10YR 6/4) loamy fine sand, yellowish brown (10YR 5/4) moist; single grained; loose, very friable; few roots; slightly acid; gradual smooth boundary. (10 to 30 inches thick)
E2--26 to 34 inches; very pale brown (10YR 7/4) loamy fine sand, brownish yellow (10YR 6/6) moist; single grained, loose, very friable; slightly acid; clear smooth boundary. (0 to 20 inches thick)
Bt1--34 to 54 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/8) moist; weak coarse prismatic structure parting to weak medium subangular blocky; hard, friable; few fine pores; few clay films on surface of peds; moderately acid; gradual smooth boundary. (8 to 40 inches thick)
Bt2--54 to 64 inches; yellowish red (5YR 5/8) fine sandy loam, yellowish red (5YR 5/6) moist; weak coarse prismatic structure parting to weak fine subangular blocky; slightly hard, friable; few fine pores; few clay films on surface of peds; very strongly acid; gradual wavy boundary. (0 to 15 inches thick)
2C--64 to 75 inches; reddish yellow (7.5YR 6/6) loamy fine sand, strong brown (7.5YR 5/6) moist; slightly hard, very friable; very strongly acid.
TYPE LOCATION: Dallas County, Texas; in southeast part of Irving, Texas; 500 feet south of intersection of Belt Line Road and Shady Grove Road, then 300 feet east of Belt Line Road in wooded pasture. (Latitude: 32 degrees, 48 minutes, 00 seconds North; Longitude: 96 degrees, 59 minutes, 00 seconds West).
RANGE IN CHARACTERISTICS: Solum thickness is 60 to more than 80 inches. Thickness of the A and E horizons is 20 to 40 inches.
The A horizon has hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 3 to 6. The E horizon has hue of 7.5YR or 10YR, value of 6 to 8, and chroma of 3 to 6. Texture is fine sand, loamy sand or loamy fine sand. Reaction is moderately acid to neutral.
The Bt horizon has hue of 2.5YR to 7.5YR, value of 4 to 6, and chroma of 6 or 8. The Bt1 horizon is sandy clay loam, clay loam, or sandy clay. Clay content in the upper 20 inches averages 18 to 35 percent. Reaction is strongly acid or moderately acid. The Bt2 horizon is loam, fine sandy loam, or sandy clay loam. Reaction ranges from slightly acid to very strongly acid. Some pedons have redoximorphic features in shades of red or yellow.
Some pedons have a loam or fine sandy loam BCt horizon with color and reaction similar to the lower Bt horizons.
The 2C horizon, where present, is yellowish red, reddish yellow, strong brown, or brown in hues of 2.5YR, 5YR or 7.5YR. Some pedons are yellow in hue of 10YR. Texture is loamy fine sand or fine sandy loam.
COMPETING SERIES: There are no competing series in the same family. Similar soils are the Dougherty, Galey, Gasil, Heatly, Heaton, Konawa, Konsil, Milby, Nimrod, Patilo, Silawa, Silstid, Stephenville, Stidham and Tremona series. Dougherty, Galey, Heatly, Konawa, and Stidham soils have mixed mineralogy. In addition, Galey and Konawa soils have A horizons less than 20 inches thick. Gasil, Konsil, Silawa, and Stephenville soils have A horizons less than 20 inches thick. In addition, Gasil and Konsil soils do not decrease in clay content significantly within 60 inches and Stephenville soils are underlain by sandstone at depths of 20 to 40 inches. Heaton, Milby, Silstid and Tremona soils do not decrease in clay content significantly within 60 inches. Heaton soils also occur in drier climates. Nimrod soils have grayish zones of iron depletion in the upper Bt horizon due to wetness. Patilo soils have grossarenic surface layers.
GEOGRAPHIC SETTING: Dutek soils occupy gently sloping to strongly sloping uplands. Slopes are mainly 1 to 4 percent, but range from 1 to 12 percent. The soil formed in loamy and sandy alluvial materials of high stream terraces. Mean annual temperature ranges from 64 to 70 degrees F., and mean annual precipitation ranges from 32 to 42 inches. Frost free days range from 240 to 270 days, and elevation ranges from 150 to 500 feet. Thornthwaite P-E indices are 52 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Gasil, Konsil and Silstid soils in the northern areas and Catilla, Kuy, Milby and Straber soils in the southern areas. These soils occur in similar positions.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderate. Runoff is very low on 1 to 3 percent slopes, low on 3 to 5 percent slopes, medium on 5 to 12 percent slopes.
USE AND VEGETATION: Most areas are in improved pasture. A few areas are used for truck crops. Native vegetation is mainly post oak and blackjack oak with an understory of mid and tall grasses and briers.
DISTRIBUTION AND EXTENT: Mainly in the East Cross Timbers area of north-central Texas and the Texas Claypan. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Dallas County, Texas; 1975.
REMARKS: Active cation exchange activity class. Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 34 inches (A, E1 and E2 horizons).
Arenic feature - 0 to 34 inches (A, E1 and E2 horizons).
Argillic horizon - 34 to 64 inches (Bt horizons).
Decrease in clay content within 60 inches.
ADDITIONAL DATA: Lincoln Laboratory data available on mechanical analysis and mineralogy - Sample No. 74L186, 76P0035-76P0040. Sand mineralogy test of the Bt horizon indicate 97 percent non-weatherable minerals.
Soil Interpretation Record No.: TX0583