LOCATION KIOMATIA TX+AR OKEstablished Series
TAXONOMIC CLASS: Sandy, mixed, thermic Typic Udifluvents
TYPICAL PEDON: Kiomatia loamy fine sand--pasture. (Colors are for moist soil unless otherwise stated.)
A--0 to 4 inches; brown (7.5YR 5/4) loamy fine sand; single grained; slightly hard, very friable; few fine roots; contains few fine strata of reddish brown (5YR 5/4) fine sandy loam; calcareous; moderately alkaline; abrupt smooth boundary. (2 to 10 inches thick)
C1--4 to 9 inches; light brown (7.5YR 6/4) fine sand; single grained; loose; common fine and medium strata of reddish brown (2.5YR 5/4) loamy fine sand and fine sandy loam; calcareous; moderately alkaline; abrupt smooth boundary. (4 to 9 inches thick)
C2--9 to 15 inches; brown (7.5YR 5/4) very fine sandy loam; single grained; soft, very friable; few fine and medium strata of dark grayish brown (10YR 4/2) fine sandy loam; calcareous; moderately alkaline; abrupt smooth boundary. (0 to 8 inches thick)
C3--15 to 60 inches; light brown (7.5YR 6/4) fine sand; single grained; loose; many fine and medium strata of reddish brown (5YR 5/4), very fine sandy loam, fine sandy loam, and pale brown (10YR 6/3) loamy fine sand; calcareous; moderately alkaline.
TYPE LOCATION: Red River County, Texas; about 15 miles northeast of Clarksville, 1 mile east of Clarksville on Highway 82 to intersection of Farm Road 114, east on 114 to English, then north on Farm Road 1699 to Martin Shiloh Church, north on county road to Chapman Ranch and continue north on private road 3 miles. Site is in pasture about 200 yards south of the Red River.
RANGE IN CHARACTERISTICS: The soil ranges from slightly acid to moderately alkaline, and is noncalcareous or calcareous.
The A horizon has colors with hue of 5YR or 7.5YR, value of 4 to 7, and chroma of 3 to 6. Texture is very fine sandy loam, fine sandy loam, loamy fine sand, or silty clay loam.
The C horizon has colors in hues of 5YR or 7.5YR, value of 4 to 8, and chroma of 4 to 8. The average texture of the 10 to 40 inch control section is fine sand or loamy fine sand stratified with loamy very fine sand or finer textures.
COMPETING SERIES: Bruno is the only competing series in this family. Closely similar soils include the Brazos, Buncombe, Crevasse, Idabel, Lincoln, Ochlockonee, Oklared, Robinsonville, Toccoa, Vicksburg, and Yahola series. Brazos and Lincoln soils are dry for longer periods. Bruno and Crevasse soils have hues yellower than 7.5YR. In addition, Crevasse soils are not stratified with textures finer than loamy fine sand. Buncombe soils are strongly to medium acid throughout and do not have strata finer than loamy fine sand to depths of 40 inches. Idabel, Oklared, and Yahola soils have average texture finer than loamy fine sand in the control section. In addition, Idabel soils have a cambic horizon and Yahola soils are dry for longer periods of time. Ochlockonee, Robinsonville, and Toccoa soils have coarse-loamy control sections. Vicksburg soils have coarse-silty control sections.
GEOGRAPHIC SETTING: Kiomatia soils are on flood plains. Gradients are 0 to 5 percent. The soils formed in sandy alluvial sediments with thin strata of finer materials. Near the type location the average annual precipitation is about 45 inches, the average temperature is about 64 degrees F, and the Thornthwaite P-E index is about 80.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Idabel and Oklared series and the Redlake and Roebuck series which are clayey throughout. These soils are in flood plains; however, Roebuck soils are in a depressed, lower position.
DRAINAGE AND PERMEABILITY: Well drained; negligible runoff; rapid permeability. The water table is within 60 inches of the surface several months of the year. The soils are flooded several times during most years where unprotected.
USE AND VEGETATION: Most areas are used for bermudagrass pasture. Natural vegetation is cottonwood and willow.
DISTRIBUTION AND EXTENT: Texas, Oklahoma, and possibly Arkansas and Louisiana. The soil is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Haskell County, Oklahoma; 1972.
REMARKS: The Kiomatia series was formerly classified in the Alluvial great soil group.
Diagnostic horizons and features recognized in this pedon are:
Stratified sandy soil materials throughout.