LOCATION CHOSKA                  OK

Established Series
Rev. ELC-JWF-RGC
08/2015

CHOSKA SERIES

The Choska series consists of very deep, well drained, soils on low terraces of flood plains. They formed in predominantly loamy alluvium of Pleistocene age. Slope ranges from 0 to 2 percent. Mean annual precipitation is about 1041 mm (41 inches), and mean annual temperature is about 17 degrees C (62 degrees F).

TAXONOMIC CLASS: Coarse-silty, mixed, active, thermic Fluventic Hapludolls

TYPICAL PEDON: Choska silt loam, on a nearly level slope in a culitvated field on a terrace, at an elevation of 171 meters (561 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)

Ap--0 to 36 cm (0 to 14 inches); dark brown (7.5YR 3/2) silt loam, brown (7.5YR 5/2) dry; moderate fine granular structure; soft, very friable; few fine roots throughout; few medium pores; slightly acid; clear smooth boundary. [18 to 51 cm (7 to 20 inches) thick]

Bw1--36 to 89 cm (14 to 36 inches); yellowish red (5YR 4/6) very fine sandy loam, yellowish red (5YR 5/6) dry; massive; soft, very friable; thin strata of loamy fine sand through silty clay loam; neutral; clear smooth boundary. [20 to 76 cm (8 to 30 inches) thick]

Bw2--89 to 122 cm (36 to 48 inches); yellowish red (5YR 4/6) silt loam, yellowish red (5YR 5/6) dry; massive; slightly hard, friable; thin strata of loamy fine sand through clay; calcareous, moderately alkaline; clear smooth boundary. [20 to 76 cm (8 to 30 inches) thick]

C--122 to 168 cm (48 to 66 inches); reddish brown (5YR 5/4) loamy fine sand, light reddish brown (5YR 6/4) dry; single grained; loose; evident bedding planes; calcareous, moderately alkaline.

TYPE LOCATION: Wagoner County, Oklahoma; about 6.5 kilometers (4 miles) south of Coweta on east side of river; 46 meters (150 feet) south and 427 meters (1,400 feet) east of the northwest corner of sec. 5, T. 16 N., R. 16 E; USGS Coweta, Oklahoma topographic quadrangle; lat. 35 degrees 54 minutes 2.47 seconds N. and long 95 degrees 38 minutes 3.41 seconds W.; UTM Zone 15, 262255 easting and 3976144 northing, NAD 83.

RANGE IN CHARACTERISTICS:
Thickness of solum ranges from 38 to 127 cm (15 to 50 inches) but the depth of soil is more than 152 cm (60 inches).
Clay content in the control section has a weight average ranging from 5 to 18 percent.

A horizon:
Hue: 5YR or 7.5YR
Value: 3,
Chroma: 2 or 3
Texture: silt loam, very fine sandy loam, loam, or fine sandy loam
Clay content: 5 to 20 percent
Reaction: slightly acid to slifhtly alkaline.

Bw horizon:
Hue: 2.5YR to 7.5YR
Value: 4 or 5
Chroma: 4 to 6
Texture: silt loam or very fine sandy loam with thin strata of loamy fine sand to silty clay loam at depth above 102 cm (40 inches) and thicker strata below 102 cm (40 inches).
Clay content: 5 to 18 percent
Reaction: neutral to moderately alkaline, and calcareous or noncalcareous.

C horizon:
Hue: 2.5YR to 7.5YR
Value: 4 or 5
Chroma: 4 to 6
Texture: loamy fine sand with thin strata of finer and coarser material.
Clay content: 5 to 12 percent
Reaction: neutral to moderately alkaline and is calcareous in most pedons.

COMPETING SERIES: There are no other series in this family.

GEOGRAPHIC SETTING: These soils are on low terraces of flood plains in the Cherokee Prairies. Slope ranges from 0 to 2 percent and are plane to slightly convex. Choska soils formed in loamy sediments of Pleistocene age. Mean annual precipitation ranges from 914 to 1168 mm (36 to 46 inches). Mean annual temperature is 14 to 20 degrees C (57 to 68 degrees F). Elevation is 170 to 255 meters (558 to 837 feet) above mean sea level. Annual Thornthwaite P-E indicies range from 64 to 80.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Kiomatia, Latanier, and Mason soils. Kiomatia soils are lower in position and lack a mollic epipedon and have sandy textures in the control section. Latanier soils are on the back part of the terrace, have vertic properties, and a clayey over loamy control section. Mason soils have an argillic horizon with more than 18 percent clay in the control section.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained. Potential for surface runoff is slow. Saturated hydraulic conductivity is moderately high. Permeability is moderate. Some areas are flooded at intervals of once in 5 to 20 years; some areas are never flooded.

USE AND VEGETATION: Used mainly for alfalfa, cotton, small grains, corn, sorghums, soybeans, and vegetable crops. Native vegetation is cottonwood, pecan, walnut, and green ash with an understory of grass.

DISTRIBUTION AND EXTENT: MLRAs 84A, 112, 117 and 118 in eastern Oklahoma and possibly Arkansas and Louisiana. The type location is in MLRA 112. The series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana

SERIES ESTABLISHED: Wagoner County, Oklahoma; 1972.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from the surface to a depth of 36 cm (Ap horizon)
Cambic horizon: from a depth of 36 to 91 cm (Bw1, Bw2 horizons)

NASIS data mapunit ID 699765 represents the typical pedon.

These soils were formerly included in the Yahola
series.

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National Cooperative Soil Survey
U.S.A.