LOCATION TEARNEY OKEstablished Series
TAXONOMIC CLASS: Clayey over sandy or sandy-skeletal, mixed, superactive, thermic Fluventic Hapludolls
TYPICAL PEDON: Tearney silty clay--rangeland. (Colors are for dry soil unless otherwise stated.)
A--0 to 10 inches; brown (7.5YR 4/2) silty clay, dark brown (7.5YR 3/2) moist; strong moderate and fine angular blocky structure; extremely hard, extremely firm; common fine roots; very few very fine iron-manganese concretions; slightly alkaline; clear smooth boundary.
Bw--10 to 26 inches; reddish brown (5YR 4/4) silty clay loam, dark reddish brown (5YR 3/4) moist; strong medium subangular blocky structure; very hard, very firm; common fine roots; few fine iron-manganese concretions; many pressure faces; slightly alkaline; abrupt smooth boundary.
2C1--26 to 30 inches; yellowish red (5YR 5/6) loamy fine sand, yellowish red (5YR 4/6) moist; massive; slightly hard, very friable; few fine roots; slightly alkaline; slightly effervescent; clear smooth boundary.
2C2--30 to 80 inches; reddish yellow (7.5YR 7/6) sand, reddish yellow (7.5YR 6/6) moist; single grained; loose, loose; slightly alkaline; slightly effervescent.
TYPE LOCATION: Noble County, Oklahoma; about 8 miles south and 2.5 miles west of Ponca City; 3,800 feet west and 2,300 feet south of the northeast corner, section 5, T. 24 N., R. 2 E.
RANGE IN CHARACTERISTICS: Thickness of the mollic epipedon is 10 to 12 inches.
The Ap or A horizon has hue of 5YR or 7.5YR, value of 4 or 5, and chroma of 2 or 3. Texture is silty clay or silty clay loam. Reaction ranges from slightly alkaline to moderately alkaline. A few pedons are slightly effervescent in this horizon.
The Bw horizon has hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 3 to 6. Texture is clay, silty clay loam, or silty clay. A few pedons have textures of loam or silt loam in the lower part of the horizon. Reaction ranges from slightly alkaline to moderately alkaline. Some pedons are slightly effervescent in this horizon.
The 2C1 horizon has hue of 5YR or 7.5YR, value of 6 or 7, and chroma of 4 to 6. Texture is loamy fine sand or fine sand. Some pedons are stratified with layers of very fine sandy loam. Reaction ranges from slightly alkaline to moderately alkaline. A few pedons are not calcareous in this horizon.
The 2C2 horizon has a hue of 5YR to 10YR, value of 6 to 8, and chroma of 4 to 6. Texture is fine sand or sand. Some pedons are stratified with silt loam, very fine sandy loam, or loam. Reaction ranges from slightly alkaline to moderately alkaline. A few pedons are not calcareous in this horizon.
COMPETING SERIES: There are no competing series in this family.
GEOGRAPHIC SETTING: Tearney soils are on nearly level flood plains of major drains and their tributaries of the Central Rolling Red Prairies (MLRA 80A). They formed in clayey alluvial sediments which have been deposited over stratified sandy alluvial sediments in interdunal depressions on flood plains. Slopes range from 0 to 1 percent. Mean Annual Precipitation: 26 to 40 inches. Mean Annual Temperature: 58 to 64 degrees F. Thornthwaite Annual P-E indices: 44 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gaddy, Goodnight, Keokuk, and Yahola series. Gaddy soils are usually closer to the drain. Goodnight soils are on dunes. Keokuk and Yahola soils are on slightly higher positions.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff, very slowly permeable. This soil is occasionally ponded for long duration.
USE AND VEGETATION: The principle use is for rangeland. Native vegetation is mainly tall grasses and mid-grasses, with a few trees. Some areas are cropped to wheat or grain sorghum.
DISTRIBUTION AND EXTENT: Central Rolling Red Prairies of Oklahoma and possibly Kansas. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES PROPOSED: Noble County, Oklahoma; 1993. The name is from the Tearney school and community in northeast Noble County.
REMARKS: These soils were formerly mapped in the Harjo and Miller series.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface of the soil to a depth of 10 inches (A horizon).
Cambic horizon - the zone from 10 inches to a depth of 26 inches (Bw horizon).
Soil Interpretation Record: OK0414 Tearney Series