LOCATION DOUGHERTY OK+TXEstablished Series
TAXONOMIC CLASS: Loamy, mixed, active, thermic Arenic Haplustalfs
TYPICAL PEDON: Dougherty loamy fine sand--cultivated. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 6 inches; grayish brown (10YR 5/2) loamy fine sand, dark grayish brown (10YR 4/2) moist; weak fine granular structure; soft, very friable; slightly acid; clear smooth boundary. (0 to 9 inches thick)
E--6 to 26 inches; very pale brown (10YR 7/3) loamy fine sand, brown (10YR 5/3) moist; single grained; soft, very friable; moderately acid; clear smooth boundary. (13 to 36 inches thick)
Bt1--26 to 42 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; moderate coarse prismatic structure parting to weak medium subangular blocky; very hard, friable; clay films on faces of peds and bridging between sand grains; moderately acid; diffuse smooth boundary. (10 to 25 inches thick)
BC--42 to 54 inches; yellowish red (5YR 5/6) fine sandy loam, yellowish red (5YR 4/6) moist; weak coarse prismatic structure; hard, friable; moderately acid; diffuse smooth boundary. (10 to 30 inches thick)
C--54 to 70 inches; yellowish red (5YR 5/8) loamy fine sand, yellowish red (5YR 4/6) moist; massive; slightly hard, friable; moderately acid.
TYPE LOCATION: Payne County, Oklahoma; about 9 miles south and 8 miles west of Stillwater on State Highway 33; 2,375 feet west and 50 feet south of the northeast corner of sec. 3, T. 17 N., R. 1 E.
RANGE IN CHARACTERISTICS: Thickness of solum ranges from 45 inches to more than 72 inches. The thickness of the A and E horizons ranges from 20 to 40 inches.
The Ap or A1 horizon has hue of 7.5YR or 10YR, value of 4 to 7, and chroma of 2 to 4. The Ap or A1 horizon is loamy fine sand or fine sand. Reaction ranges from slightly acid to strongly acid.
The E horizon has hue of 7.5YR or 10YR, value of 5 to 8, and chroma of 2 to 4. It is loamy fine sand or fine sand. Reaction ranges from slightly acid to strongly acid.
The Bt or BC horizons have hue of 2.5YR to 7.5YR, value of 4 to 7, and chroma of 4 to 8. The Bt horizon is fine sandy loam or sandy clay loam and the clay content ranges from 18 to 35 percent. Reaction ranges from slightly acid to strongly acid.
The BC horizon has similar colors to the Bt horizon. It is fine sandy loam, sandy clay loam, or loamy fine sand. The reaction ranges from slightly acid to strongly acid.
The C horizon has the same colors as the Bt and BC horizons. It is fine sandy loam or loamy fine sand. Reaction ranges from neutral to strongly acid.
COMPETING SERIES: This is the Stidham series. Stidham soils have an argillic horizon in hue of 7.5YR to 10YR.
GEOGRAPHIC SETTING: Dougherty soils occur on nearly level to moderately steep terraces. They have developed in strongly acid through neutral sandy or loamy sediments. Slopes are dominantly between 0 to 8 percent but range to 20 percent. The climate is dry subhumid or moist subhumid. Mean Annual Precipitation: 30 to 38 inches. Mean Annual Temperature: 58 to 62 degrees F. Thornthwaite Annual P-E indices: 48 to 64. Frost free days range from 200 to 230. Elevation ranges from 800 to 1300 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bastrop, Derby, Eufaula, Konawa, Larton, Slaughterville, Stidham, and Teller series. Bastrop, Larton, and Stidham soils are on higher terraces. Bastrop soils have an argillic horizon that does not decreaseby 20 percent from the maximum within a depth of 60 inches of the surface. Eufaula soils are in slightly higher positions and are sandy. Konawa and Teller soils are in slightly lower positions and more stable landscapes. Derby and Slaughterville soils are on recent aeolian sediments.
DRAINAGE AND PERMEABILITY: Well drained; permeability is moderate; runoff is negligible on 0 to 1 percent slopes, very low on 1 to 5 percent slopes, and low on 5 to 20 percent slopes.
USE AND VEGETATION: Large areas are cultivated to sorghums, small grains, and peanuts. Some areas are used for improved pastures. Native vegetation is mainly postoak, blackjack, and hickory with considerable understory of little bluestem, big bluestem, sand bluestem, indiangrass, and switchgrass.
DISTRIBUTION AND EXTENT: Northern Crosstimbers (MLRA 84A) of Central Oklahoma and Texas. The series is extensive.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Murray County, Oklahoma; 1935.
REMARKS: Soil Interpretation Record No. OK0050
Dougherty soils were formerly classified in the Red Podzolic great soil group.
Diagnostic horizons and features recognized in the pedon are:
Ochric epipedon - the zone from the surface of the soil to a depth of 6 inches (A horizon).
Albic horizon - the zone from 6 inches to a depth of 26 inches (E horizon).
Argillic horizon - the zone from 26 inches to a depth of 42 inches (Bt horizon).