LOCATION CHOSKA             OK

CHOSKA SERIES

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

TYPICAL PEDON: Choska silt loam--on a nearly level slope in a culitvated field.
(Colors are for moist soil unless otherwise
stated.)

Ap--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; few medium pores; slightly acid; clear smooth boundary. (7 to 20 inches thick)

Bw1--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. (8 to 30 inches thick)

Bw2--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. (8 to 30 inches
thick)

C--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 4 miles south of Coweta on east side of river; 150 feet south and 1,400 feet east
of the northwest corner of sec. 5, T. 16 N., R. 16 E.

Thickness of solum ranges from 15 to 50 inches but the depth of
soil is more than 60 inches. Clay content in the control section
has a weight average ranging from 5 to 18 percent.

The A horizon has hue of 5YR or 7.5YR, value of 3, and chroma of
2 or 3. It is silt loam, very fine sandy loam, loam, or fine
sandy loam and is slightly acid to mildly alkaline.
The Bw horizon has hue of 2.5YR to 7.5YR, value of 4 or 5, and
chroma of 4 to 6. It is silt loam or very fine sandy loam with
thin strata of loamy fine sand to silty clay loam at depth above
40 inches and thicker strata below 40 inches. This horizon is neutral to moderately alkaline, and calcareous or noncalcareous.

The C horizon has colors like the Bw horizon. It is dominantly
loamy fine sand with thin strata of finer and coarser material.
It is neutral to moderately alkaline and is calcareous in most pedons.

COMPETING SERIES: There are no other series in this family.
Soils in similar families are Beulah, Cleora, Gracemont, Lonoke, Ochlockonee, Oklared, Pursley, Robinsonville and Toccoa series. Beulah, Gracemont, Lonoke, Ochlockonee, Oklared, Robinsonville
and Toccoa soils lack a mollic epipedon. In addition, these, as
well as, Cleora and Pursley soils have 15 percent or more of fine sand and coarser particles in the control section. Pursley soils contain more than 18 percent clay.

GEOGRAPHIC SETTING: These soils are on low terraces of flood
plains in the Cherokee Prairies. Slopes are plane to slightly convex; gradients are 0 to 2 percent. Choska soils formed in
loamy sediments of Pleistocene age. These soils in some areas
are flooded at intervals of once in 5 to 20 years; some areas are never flooded. Mean annual precipitation ranges from 36 to 46 inches. Mean annual temperature is 57 to 68 degrees F. Annual Thornthwaite P-E indicies range from 64 to 80. These soils have
a water table at about 20 to 30 feet.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Kiomatia, Latanier,
and Mason series. 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 PERMEABILITY: Well drained; slow runoff; moderate permeability.

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: Eastern Oklahoma and possibly Arkansas
and Louisiana. The series is of moderate extent.

MLRA OFFICE RESPONSIBLE: Salina, Kansas

SERIES ESTABLISHED: Wagoner County, Oklahoma; 1972.

REMARKS: These soils were formerly included in the Yahola
series.