LOCATION OKAY OK+TXEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, thermic Typic Argiudolls
TYPICAL PEDON: Okay loam--cultivated. (Colors are for moist soil unless otherwise stated.)
A--0 to 12 inches; dark brown (10YR 3/3) loam, brown (10YR 5/3) dry; moderate fine granular structure; slightly hard, friable; many fine roots; slightly acid; gradual smooth boundary. (8 to 16 inches thick)
Bt1--12 to 18 inches; dark brown (7.5YR 3/2) loam, dark brown (7.5YR 4/2) dry; moderate fine subangular blocky structure; hard, friable; few fine roots; thin patchy clay film on faces of peds; slightly acid; gradual smooth boundary. (0 to 8 inches thick)
Bt2--18 to 38 inches; reddish brown (5YR 4/4) clay loam, reddish brown (5YR 5/4) dry; moderate medium subangular blocky structure; very hard, firm; few fine roots; nearly continuous clay films on faces of peds; slightly acid; gradual smooth boundary. (8 to 25 inches thick)
Bt3--38 to 46 inches; reddish brown (5YR 5/4) clay loam, light reddish brown (5YR 6/4) dry; moderate medium subangular blocky structure; very hard, firm; nearly continuous clay films on faces of peds; slightly acid; gradual smooth boundary. (6 to 20 inches thick)
BC--46 to 70 inches; reddish brown (5YR 5/4) loam, light reddish brown (5YR 6/4) dry; weak medium subangular blocky structure; hard, friable; few pockets of clean sand grains in the lower part; slightly acid.
TYPE LOCATION: Tulsa County, Oklahoma; 6 miles south of Broken Arrow; 2,600 feet south and 100 feet west of the northeast corner of sec. 12, T. 17 N., R. 14 E.
RANGE IN CHARACTERISTICS: Solum thickness and depth to bedrock or contrasting substratum is more than 60 inches.
The A horizon has hue of 5YR to 10YR, value of 2 or 3, and chroma of 2 or 3. Texture is loam, very fine sandy loam, or fine sandy loam. It is moderately acid to neutral.
Some pedons have a BA horizon with hue of 5YR to 10YR, value of 3 to 4, and chroma of 2 to 4. It is very fine sandy loam, loam, or clay loam and is moderately acid to neutral.
The Bt horizon has hue of 2.5YR to 7.5YR, value of 3 to 5, and chroma of 4 to 8. Texture is loam, clay loam, or sandy clay loam. It ranges from strongly acid to slightly acid.
The BC horizon has hue of 2.5YR to 7.5YR, value of 3 to 5, and chroma of 4 to 8. Texture is fine sandy loam, loam, or sandy clay loam. It is strongly acid to neutral. Clay content of the BC horizon decreases from the maximum in the Bt horizon by more than 20 percent within a depth of 60 inches.
COMPETING SERIES: This is the Fitzhugh series. Fitzhugh soils have sola less than 60 inches thick.
GEOGRAPHIC SETTING: Okay soils occur on nearly level to sloping terraces and formed in loamy alluvium of major streams or rivers. The slopes range from 0 to 5 percent. The climate is moist subhumid to humid. The annual Thornthwaite P-E indices are from 64 to 80. Mean annual precipitation is about 37 to 43 inches. Annual air temperature is about 57 to 64 degrees F. Frost free days range from 200 to 220.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Caspiana, Kamie, Karma, and Mason soils. Caspiana and Mason soils are on the same terrace, but slightly lower in the landscape and farther from the main stream. Kamie soils are on higher terraces. Karma soils are on lower terraces or on the same terrace but slightly higher in the landscape and closer to the main stream.
DRAINAGE AND PERMEABILITY: Well drained; low to medium runoff; moderate permeability.
USE AND VEGETATION: Mainly used for growing small grains, sorghums, soybeans, and cotton, and for tame pastures. Lesser amounts are used for native range. The native vegetation is tall prairie grasses and scattered oak.
DISTRIBUTION AND EXTENT: Eastern Oklahoma; possibly in southeastern Kansas, southwestern Missouri, western Arkansas, and western Louisiana. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Wagoner County, Oklahoma; 1972.
REMARKS: Soil Interpretation Record: Series OK0081; Diagnostic horizons and features recognized in this soil are: Mollic epipedon - the zone from the surface of the soil to a depth of 18 inches (the A and Bt1 horizons). Argillic horizon - the zone from 12 to 46 inches (the Bt horizons); Moisture Regime: Udic.
These soils were formerly included in the Teller series.