LOCATION WESTOLA OK+TXEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, calcareous, thermic Typic Ustifluvents
TYPICAL PEDON: Westola fine sandy loam, cultivated. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 7 inches; reddish brown (5YR 5/4) fine sandy loam, reddish brown (5YR 4/4) moist; weak fine granular structure; soft, very friable; few fine roots; strongly effervescent; moderately alkaline; abrupt smooth boundary. (0 to 8 inches thick)
A--7 to 11 inches; reddish brown (5YR 4/4) fine sandy loam, dark reddish brown (5YR 3/4) moist; weak fine subangular blocky structure parting to weak fine granular; soft, very friable; few fine roots; strongly effervescent; moderately alkaline; clear smooth boundary. (8 to 12 inches thick)
C1--11 to 40 inches; reddish brown (5YR 5/4) fine sandy loam, reddish brown (5YR 4/4) moist; massive; soft, very friable; few fine roots; common distinct strata of loamy fine sand and fine sand 3 to 13mm thick, common distinct strata of dark reddish brown (5YR 3/3) loam and fine sandy loam 1 to 2mm thick; strongly effervescent; moderately alkaline; clear smooth boundary. (0 to 48 inches thick)
C2--40 to 80 inches; reddish brown (5YR 5/4) loam, reddish brown (5YR 4/4) moist; massive; soft, very friable; common distinct strata of yellowish red (5YR 4/6) fine sandy loam and dark reddish brown (5YR 3/4) silt loam 1 to 2mm thick; strongly effervescent; moderately alkaline.
TYPE LOCATION: Woods County, Oklahoma; about 2 miles east and 1 mile south of Freedom, Oklahoma; about 450 feet north and 2100 feet east of the southwest corner of sec. 6, T. 26 N., R. 17 W.
RANGE IN CHARACTERISTICS: The A horizon has hue of 2.5YR to 7.5YR, value of 4 to 6, and chroma of 2 to 6. Texture is dominantly fine sandy loam, but may be loam, very fine sandy loam, or loamy fine sand. Reaction is slightly or moderately alkaline and slight to strong effervescence. Where the A horizon has value of 5.5 or less, chroma of 3.5 or less, and thickness is more than 10 inches, the organic matter content is less than 1 percent.
Some pedons have an AC horizon that has color, texture, and reaction similar to the A horizon. These occur on rarely flooded areas which have less overflow and are stable landscapes for longer periods.
The C horizon has hue of 2.5YR to 7.5YR, value of 4 to 7, and chroma of 3 to 8. Texture is fine sandy loam, loam, or very fine sandy loam. Reaction is moderately alkaline and strongly effervescent. Thin strata up to 10cm thick are common with texture ranging from sand to clay loam. Strata of clean sand may have dry value of 7 or 8. In some pedons below 40 inches, textures may be loamy fine sand or coarser.
Some pedons have buried horizons below 40 inches.
COMPETING SERIES: This is the Santo (TX) series. Similar soils are the Yahola series. Santo soils have C horizons that have hue of 10YR. Yahola soils have an ustic moisture regime that borders on a udic moisture regime.
GEOGRAPHIC SETTING: Westola soils are on nearly level flood plains in the Central Rolling Red Plains (MLRA 78B, 78C). Slopes are 0 to 1 percent. The soil formed in calcareous loamy alluvium on flood plains that drain Permian and Pleistocene age sediments. Mean annual precipitation ranges from 22 to 32 inches. Mean annual air temperature ranges from 57 to 64 degrees F. Frost free days range from 185 to 230. Thornthwaite annual P-E index ranges from 32 to 44. Elevation ranges from 1000 to 2300 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clairemont, Gracemont, Gracemore, Lincoln and Wheatwood series. Clairemont and Wheatwood soils are on similar areas and have a fine-silty particle-size textural control section. Gracemont and Gracemore soils are on lower areas and have a water table within 6 feet of the surface. Lincoln soils are on similar areas and have a sandy particle-size textural control section.
DRAINAGE AND PERMEABILITY: Westola soils are well drained; permeability is moderately rapid. Runoff is negligible. These soils are rarely to frequently flooded for very brief periods during April to October.
USE AND VEGETATION: These soils are mainly cropped to alfalfa, cotton, small grains, forage sorghum, and tame pasture. The native vegetation is tall and mid grasses with Eastern Cottonwood, Tamarisk, and American Elm.
DISTRIBUTION AND EXTENT: Central Rolling Red Plains (MLRA-78B, 78C) of Oklahoma, Kansas, and Texas. The series is extensive.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Woods County, Oklahoma; 1995. Name is an acronym from West and Yahola.
REMARKS: Westola soils were formerly mapped as Yahola.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 11 inches. (A horizons)
Typic Ustifluvents - Occurs in the Typic-Ustic moisture regime.
Fluvents - Irregular decrease in organic matter content.
Soil Interpretation Record: OK0354