LOCATION COWETA OK+MOEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, superactive, thermic, shallow Typic Hapludolls
TYPICAL PEDON: Coweta loam--rangeland. (Colors are for moist soil unless otherwise stated.)
A--0 to 20 centimeters (0 to 8 inches); dark brown (7.5YR 3/2) loam, brown (7.5YR 5/2) dry; moderate fine granular structure; slightly hard, friable; many fine and medium roots; few sandstone fragments; moderately acid; gradual wavy boundary. (10 to 36 centimeters (4 to 14 inches) thick)
Bw--20 to 38 centimeters (8 to 15 inches); brown (7.5YR 4/4) gravelly fine sandy loam, brown (7.5YR 5/4) dry; weak fine granular structure; slightly hard, friable; common fine roots; 20 percent by volume of soft sandstone fragments less than 3 inches in diameter; 10 percent sandstone fragments 3 to 10 inches in diameter; moderately acid; abrupt wavy boundary. (15 to 30 centimeters (6 to 12 inches) thick)
Cr--38 to 76 centimeters (15 to 30 inches); strong brown (7.5YR 5/6) and yellowish red (5YR 5/8) soft sandstone interbedded with shale; strongly acid.
TYPE LOCATION: Wagoner County, Oklahoma; about 18 kilometers (11 miles) northeast of Coweta; 625 meters (2,050 feet) west and 15 meters (50 feet) south of the northeast corner of sec. 29, T. 19 N., R. 15 E.
RANGE IN CHARACTERISTICS:
Solum thickness and depth to soft sandstone bedrock: 25 to 51 centimeters (10 to 20 inches)
A horizon:
Hue: 7.5YR or 10YR
Value: 3
Chroma: 2 or 3
Texture: loam, fine sandy loam, gravelly loam, gravelly fine sandy loam, cobbly loam, cobbly fine sandy loam, stony fine sandy loam or stony loam
Coarse fragment content: 0 to 35 percent by volume
Coarse fragments less than 76mm in diameter: 0 to 20 percent by volume
Coarse fragments 76mm to 250mm in diameter: 0 to 30 percent by volume
Coarse fragments more than 250mm: 0 to 30 percent by volume
Reaction: strongly acid to slightly acid
Bw horizon:
Hue: 5YR to 10YR
Value: 3 to 5
Chroma: 2 to 8
Texture: loam, fine sandy loam, clay loam, gravelly loam, gravelly fine sandy loam, or gravelly clay loam
Coarse fragments content: 5 to 35 percent by volume
Coarse fragments less than 76mm in diameter: 5 to 30 percent by volume
Coarse fragments more than 76mm in diameter: 0 to 15 percent by volume
Reaction: strongly acid to slightly acid
Cr horizon:
Material: soft, acid sandstone usually interbedded with shale
Hardness: less than 3 (Mohs scale)
In some pedons, hard sandstone occurs between depths of 61 to 152 centimeters (24 and 60 inches)
Excavation difficulty: high
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING:
Landform: broad smooth upland ridges in the Cherokee Prairies
Slope: 1 to 30 percent
Parent material: residuum weathered from soft sandstone interbedded with shale of Pennsylvanian age
Climate: moist subhumid to humid
Mean annual precipitation: 94 to 114 centimeters (37 to 45 inches)
Mean annual air temperature: 14 to 17 degrees C. (57 to 63 degrees F.)
Thornthwaite P-E index: 64 to 80
Frost free days: 200 to 225
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Bates,
Collinsville,
Dennis,
Eram,
Talihina, and
Vinita soils.
Bates, Dennis, Eram, and Vinita soils are on lower slopes and they have an argillic horizon and a solum thicker than 51 centimeters (20 inches). Collinsville soils have a lithic contact within 51 centimeters (20 inches).
Talihina soils have more than 35 percent clay content in the control section.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: well drained to somewhat excessively drained
Runoff: medium to very high
Saturated hydraulic conductivity: moderately high
USE AND VEGETATION: Principal use is for rangeland.
Some areas are used for tame pasture on slopes less than 15 percent.
Small amounts are cultivated on slopes less than 5 percent.
Native vegetation is tall grass prairie.
DISTRIBUTION AND EXTENT: Eastern Oklahoma, possibly southeastern Kansas and southwestern Missouri. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Salina, Kansas
SERIES ESTABLISHED: Wagoner County, Oklahoma; 1972.
REMARKS: Diagnostic horizons and features recognized in this soil are:
Mollic epipedon: 0 to 20 centimeters (0 to 8 inches) (the A horizon)
Cambic horizon: 20 to 38 centimeters (8 to 15 inches) (the Bw horizon)
Paralithic control: soft sandstone bedrock at a depth of 38 centimeters (15 inches)
Moisture Regime: Udic
These soils were formerly included in the Collinsville series.
Soil Interpretation Record: Series OK0108; Stony- OK0337; Gravelly- OK0426; Cobbly- OK0427
Modified format by LRM in 1/2006 to include metric conversion and change permeability to saturated hydraulic conductivity.