LOCATION CHOTEAU OKEstablished Series
TAXONOMIC CLASS: Fine, mixed, active, thermic Aquic Paleudolls
TYPICAL PEDON: Choteau silt loam--cultivated. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 15 centimeters (0 to 6 inches); very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; weak fine granular structure; slightly hard, friable; slightly acid; clear smooth boundary. (0 to 20 centimeters (0 to 8 inches) thick)
A--15 to 36 centimeters (6 to 14 inches); very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; moderate medium and fine granular structure; slightly hard, friable; moderately acid; clear smooth boundary. (5 to 38 centimeters (2 to 15 inches) thick)
E--36 to 56 centimeters (14 to 22 inches); brown (10YR 5/3) silt loam, pale brown (10YR 6/3) dry; moderate medium granular structure; slightly hard, friable; moderately acid; clear smooth boundary. (8 to 66 centimeters (3 to 26 inches) thick)
BE--56 to 66 centimeters (22 to 26 inches); yellowish brown (10YR 5/4) silty clay loam, light yellowish brown (10YR 6/4) dry; few fine faint brownish yellow and grayish brown redoximorphic concentration masses; weak fine subangular blocky structure; hard, friable; strongly acid; gradual smooth boundary. (5 to 20 centimeters (2 to 8 inches) thick)
Bt1--66 to 86 centimeters (26 to 34 inches); dark yellowish brown (10YR 4/4) clay, yellowish brown (10YR 5/4) dry; many medium distinct grayish brown (10YR 5/2) redoximorphic depletions and common fine and medium prominent red (2.5YR 4/6) redoximorphic concentration masses; moderate medium blocky structure; very hard, very firm; patchy clay films on faces of peds; strongly acid; gradual smooth boundary. (15 to 30 centimeters (6 to 12 inches) thick)
Bt2--86 to 102 centimeters (34 to 40 inches); yellowish brown (10YR 5/4) clay, light yellowish brown (10YR 6/4) dry; many medium distinct grayish brown (10YR 5/2) redoximorphic depletion masses and brownish yellow (10YR 6/6) redoximorphic concentration masses; moderate medium blocky structure; very hard, very firm; patchy clay films on faces of peds; slightly acid; gradual smooth boundary. (10 to 30 centimeters (4 to 12 inches) thick)
Bt3--102 to 165 centimeters (40 to 65 inches); mixed yellowish brown (10YR 5/6), brownish yellow (10YR 6/6), and grayish brown (10YR 5/2) clay, yellow (10YR 7/6), and light brownish gray (10YR 6/2) dry; redoximorphic concentration and depletion masses; weak coarse blocky structure; very hard, very firm; patchy clay films on faces of peds; neutral.
TYPE LOCATION: Mayes County, Oklahoma; about 6.4 kilometers (4 miles) east and 6.4 kilometers (4 miles) north of Pryor, 762 meters (2,500 feet) south and 396 meters (1,300 feet) west of the northeast corner of sec. 23, T. 22 N., R. 19 E.
RANGE IN CHARACTERISTICS:
Thickness of solum: more than 152 centimeters (60 inches)
Combined thickness of the A and E horizons: 41 to 97 centimeters (16 to 38 inches)
Ap or A horizon:
Hue: 10YR
Value: 2 or 3
Chroma: 2 or 3
Texure: loam, very fine sandy loam, or silt loam
Reaction: slightly acid to very strongly acid
E horizon:
Hue: 10YR
Value: 4 to 6
Chroma: 2 or 3
Texture: silt loam or loam
Reaction: moderately acid to very strongly acid
BE horizon:
Hue: 10YR
Value: 3 to 5
Chroma: 2 to 4
Texture: silty clay loam or clay loam
Reaction: moderately acid to very strongly acid
Bt1 horizon or Bt2 horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 3 to 6
Redoximorphic features: shades of gray or brown with chroma of 2 or less in the upper 51 centimeters (20 inches) of the argillic horizon
Texture: silty clay loam, clay loam, silty clay, or clay
Reaction: slightly alkaline to strongly acid
Bt3 horizon: has many coarse mottles with
Hue: 7.5YR or 10YR
Value: 5 to 7
Chroma: 6 to 8
Mottles: shades of brown or gray (many coarse mottles)
Texture: silty clay loam, clay loam, silty clay, or clay
Reaction: moderately acid to slightly alkaline
COMPETING SERIES: This is the
Okemah series.
Okemah soils have an argillic horizon with dominant matrix chromas of 2 or less.
GEOGRAPHIC SETTING:
Landform: nearly level to gently sloping smooth high terraces or foot slopes of uplands in the Cherokee Prairies
Parent material: loamy and clayey alluvium or colluvium over shale of Pennsylvanian age
Slopes: generally 0 to 3 percent but range from 0 to 5 percent
Mean annual precipitation: 94 to 117 centimeters (37 to 46 inches)
Mean annual temperature: 14 to 17 degrees C. (57 degrees to 63 degrees F.)
Thornthwaite annual P-E indices: 64 or more
Frost free days: 190 to 220
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Apperson,
Bates,
Collinsville,
Dennis,
Parsons,
Summit, and Talika series.
Apperson, Dennis, and Summit soils are on the landscape in slightly higher positions.
Bates and Collinsville soils are on ridge crests.
Bates soils are fine-loamy and have sandstone at a depth of 20 to 40 inches.
Collinsville soils are loamy and have sandstone within a depth of 20 inches.
Parsons, and
Taloka soils are on the same landscape in slightly lower positions, have an ochric epipedon and an abrupt change in texture from the A horizon to the Bt horizon.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: somewhat poorly drained
Runoff: low to medium
Saturated hydraulic conductivity: moderately low
Episaturation (perched water table): 76 to 91 centimeters (2.5 to 3 feet) and a bottom depth of 152 to 244 centimeters (5 feet to 8 feet) during December to April.
USE AND VEGETATION: These soils are used principally for cropland.
Principal crops are small grains, sorghums, or soybeans.
Some areas are used for tame pasture.
Lesser amounts are used for native range of tall grass prairie.
DISTRIBUTION AND EXTENT: Southeastern Kansas and eastern Oklahoma. The series is extensive.
MLRA OFFICE RESPONSIBLE: Salina, Kansas
SERIES ESTABLISHED: Wagoner County, Oklahoma; 1941.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic Epipedon: 0 to 36 centimeters (0 to 14 inches (Ap and A horizons)
Albic horizon: 36 to 56 centimeters (14 to 22 inches) (the E horizon)
Argillic horizon: 66 to 165 centimeters (26 to 65 inches) (The Bt horizons)
Aquic: redoximorphic depletion within the upper 50 cm (20 inches) of the argillic horizon and aquic conditions for some time in most years
Soil Interpretive Record: OK0001
Additional Data: National Soil Survey Laboratory, Lincoln, NE. Samples S53OK-145-021 (35657-35665) and S53OK-145-024 (35666-35674) from Wagoner County, OK.
http://ssldata.sc.egov.usda.gov/rptExecute.asp?p=4450&r=1&submit1=Get+Report
Modified format by LRM in 1/2006 to include metric conversion and change permeability to saturated hydraulic conductivity.