LOCATION TEVAL OKEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, thermic Udic Argiustolls
TYPICAL PEDON: Teval loam--native range. (Colors are for dry soil unless otherwise stated.)
A--0 to 7 inches; dark brown (7.5YR 4/3) loam, dark brown (7.5YR 3/3) moist; moderate fine granular structure; hard, friable; many very fine and few fine roots; common very fine pores; moderately acid; clear smooth boundary. (4 to 10 inches thick)
BA--7 to 11 inches; reddish brown (5YR 4/3) clay loam, dark reddish brown (5YR 3/3) moist; weak fine subangular blocky structure parting to moderate medium granular; hard, firm; many very fine and few fine roots; common very fine pores; slightly acid; clear smooth boundary. (3 to 6 inches thick)
Bt1--11 to 20 inches; reddish brown (5YR 4/4) clay loam, dark reddish brown (5YR 3/4) moist; moderate fine prismatic structure parting to moderate medium subangular blocky; very hard, very firm; many very fine and few fine roots; many very fine pores; common distinct clay films on ped faces; slightly acid; gradual smooth boundary. (4 to 20 inches thick)
Bt2--20 to 32 inches; reddish brown (2.5YR 4/4) clay loam, dark reddish brown (2.5YR 3/4) moist; moderate medium prismatic structure parting to moderate medium blocky; very hard, very firm; common very fine roots and few fine roots; common very fine pores; common distinct clay films on ped faces; neutral; gradual smooth boundary. (8 to 18 inches thick)
Bt3--32 to 38 inches; reddish brown (2.5YR 4/4) clay loam, dark reddish brown (2.5YR 3/4) moist; moderate medium prismatic structure parting to weak medium blocky; very hard, very firm; common very fine roots; few very fine pores; few distinct clay films on ped faces; five percent by volume fragments 2 to 76mm in diameter; neutral; clear wavy boundary. (6 to 12 inches thick)
2C--38 to 50 inches; stratified red (2.5YR 5/6) sandy loam, gravelly sandy loam, fine sandy loam, gravelly fine sandy loam, silt loam, clay loam, and gravelly clay loam; red (2.5YR 4/6) moist; massive; slightly hard, very friable; few very fine roots; strata are 1/4 to 3 inches thick; strongly effervescent; 20 percent by volume fragments 2 to 76mm in diameter; moderately alkaline; gradual smooth boundary. (9 to 22 inches)
3C--50 to 96 inches; stratified red (2.5YR 5/6) very gravelly sandy loam, very gravelly fine sandy loam, very gravelly silt loam, and very gravelly clay loam, red (2.5YR 4/6) moist; massive; slightly hard, very friable; few very fine roots; strata are 1/4 to 3 inches thick; strongly effervescent; 40 percent by volume fragments 2 to 76mm in diameter; moderately alkaline.
TYPE LOCATION: Oklahoma County, Oklahoma; about 7 miles west and 3.5 miles north of Edmond, Oklahoma; 2580 feet north and 1050 feet west of the southeast corner of sec. 10, T. 14 N., R. 4 W.
RANGE IN CHARACTERISTICS: Solum is 30 to 50 inches thick. The mollic epipedon is less than 20 inches thick.
The A horizon has hue of 5YR or 7.5YR, value of 4 or 5, and chroma of 2 or 3. Texture is loam or silt loam. Fragments 2 to 76mm in diameter range from 0 to 2 percent by volume. Reaction is moderately acid to neutral.
The BA horizon has hue of 5YR, value of 4 or 5, and chroma of 3. Texture is loam, sandy clay loam, or clay loam. Fragments 2 to 76mm in diameter range from 0 to 2 percent by volume. Reaction is moderately acid to slightly alkaline.
The Bt horizons have hue of 2.5YR or 5YR, value of 4 or 5, and chroma of 4 or 6. Texture is loam, sandy clay loam, or clay loam. Fragments 2 to 76mm in diameter range from 0 to 15 percent by volume. Reaction is slightly acid to moderately alkaline.
The 2C horizon has hue of 2.5YR, value of 4 to 6, and chroma of 4 or 6. Texture is stratified fine sand, sandy loam, fine sandy loam, loam, silt loam, sandy clay loam, clay loam, gravelly fine sand, gravelly sandy loam, gravelly fine sandy loam, gravelly loam, gravelly silt loam, gravelly sandy clay loam and gravelly clay loam. Strata are 1/4 inch to 6 inches thick. Fragments 2 to 76mm in diameter range from 15 to 34 percent by volume. Reaction is slightly alkaline to moderately alkaline.
The 3C horizon has hue of 2.5YR, value of 4 to 6, and chroma of 6. Texture is stratified very gravelly fine sand, very gravelly loamy fine sand, very gravelly sandy loam, very gravelly fine sandy loam, very gravelly loam, very gravelly sandy clay loam, and very gravelly clay loam. Strata are 1/4 inch to 6 inches thick. Fragments 2 to 76mm in diameter range from 35 to 60 percent by volume. Reaction is slightly alkaline to moderately alkaline.
COMPETING SERIES: These are Carman (OK), Chickasha (OK), Lovedale (OK), Milan (KS), Navina (OK), Ravia (OK), Schulenburg (TX), Stoneburg (TX), Teller (OK), and Waynoka (OK) series. Carman and Madge soils are dryer for longer periods. Chickasha soils have bedrock within 60 inches. Lovedale, Milan, and Ravia soils contain more than 20 percent material coarser than fine sand in the upper 20 inches of the argillic horizon. Navina, Schulenburg and Teller soils do not have more than 20 percent fragments 2 to 76mm within 60 inches of the soil surface and have a solum more than 50 inches thick. Stoneburg soils have bedrock within 40 inches. Waynoka soils do not have more than 20 percent coarse fragments 2 to 76mm within 60 inches of the soil surface and have a discontinuity with an increase in clay content in the lower part.
GEOGRAPHIC SETTING: Teval soils are on gently sloping to sloping prairie upland terraces in the Central Rolling Red Prairies. Slopes are 3 to 8 percent. They formed in loamy sediments over sandy and gravelly deposits. Mean annual precipitation ranges from 30 to 38 inches. Mean annual temperature ranges from 59 to 63 degrees F.. Thornthwaite annual P-E indices range from 46 to 58.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dougherty, Konawa, Norge, and Teller series. Teller soils are on adjacent landforms but do not have a gravelly substratum. Dougherty and Konawa soils are on slightly higher positions and do not have a mollic epipedon or a gravelly substratum. Norge soils are on slightly higher positions, have a fine silty textural control family and do not have a gravelly substratum.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability; runoff is low on 3 to 5 percent slopes and medium on 5 to 8 percent slopes.
USE AND VEGETATION: Mainly in native mid and tall grasses. A few areas are being mined for gravel.
DISTRIBUTION AND EXTENT: Central Rolling Red Prairies (MLRA 80A) of Oklahoma. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES PROPOSED: Oklahoma County, Oklahoma; 1995.
REMARKS: Soil Interpretation Record: Series OK0406.
These soils were formerly mapped as Norge Variant or Teller Variant.
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon- the zone from the soil surface to a depth of 11 inches (the A horizon).
Argillic horizon- The zone from 11 inches to a depth of 38 inches (the Bt horizon).
Contrasting layer at 38 inches.