LOCATION PUSHMATAHA OKEstablished Series
TAXONOMIC CLASS: Coarse-silty, siliceous, active, nonacid, thermic Aquic Udifluvents
TYPICAL PEDON: Pushmataha loam, on nearly level slope, in pasture. (Colors are for moist soil unless otherwise stated. When described the soil was wet below 30 inches.)
A1--0 to 12 inches; dark brown (10YR 4/3) loam; weak fine and medium granular structure; friable; common fine and medium roots inside peds; few fine distinct light gray (10YR 7/1) iron depletions; moderately acid; gradual smooth boundary. (10 to 15 inches thick)
A2--12 to 22 inches; brown (10YR 5/3) loam; weak fine and medium granular structure; friable; common fine and medium roots inside peds; few fine distinct light gray (10YR 7/1) iron depletions; strongly acid; gradual smooth boundary. (10 to 17 inches thick)
C1--22 to 38 inches; brown (10YR 5/3) loam; massive; friable; common fine and medium roots inside peds; thin strata of fine sandy loam and silt loam; common fine and medium distinct yellowish brown (10YR 5/6) iron accumulations and common fine and medium distinct light gray (10YR 7/1) iron depletions; moderately acid; gradual smooth boundary. (13 to 20 inches thick)
C2--38 to 60 inches; light gray (10YR 7/2) silt loam; massive; friable; few fine roots inside peds; thin strata of loam and fine sandy loam; common fine and medium distinct yellowish brown (10YR 5/6) iron accumulations; moderately acid.
TYPE LOCATION: Pushmataha County, Oklahoma; about 1 mile west of Sardis; 1200 feet west and 200 feet south from northeast corner sec. 8, T. 2 N., R. 18 E.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 20 to 32 inches.
The A1 horizon has hue of 10YR or 2.5Y, values of 4, and chromas that range from 2 through 4. Texture is loam, very fine sandy loam, or silt loam. Iron depletions range from none to few in shades of gray. Reaction ranges from strongly acid through slightly acid.
The A12 horizon has hue of 7.5YR, 10YR, or 2.5Y and values that range from 4 through 7, and chromas of 2 through 8. Iron accumulations and depletions are shades of brown and gray. Texture is loam, very fine sandy loam, or silt loam. Reaction ranges from strongly acid through neutral.
The C horizon has hue of 7.5YR, 10YR, or 2.5Y, and values that range from 4 through 7, and chromas of 2 through 8. Iron depletions are in shades of gray. Texture is loam, very fine sandy loam, or silt loam. Reaction ranges from strongly acid through neutral. This horizon has thin strata ranging from fine sandy loam through silty clay loam.
COMPETING SERIES: These are the Adler, Bibb, Boggy, Cartecay, Collins, Hatliff, Iuka, Tribbey, and Tullahassee series. Adler and Collins soils have mixed mineralogy. In addtion, Collins soils have a control section with pH less than 5.0. Bibb soils have a coarse-loamy control section and a pH less than 5.0. Boggy soils have coarse-loamy control sections. Cartecay, Hatliff, Tribbey and Tullahassee soils have mixed mineralogy and a coarse-loamy control section. Iuka soils have a coarse-loamy control section and pH less than 5.0.
GEOGRAPHIC SETTING: Pushmataha soils are on narrow flood plains of the Ouachita Mountains, MLRA 119. Slopes are 0 to 1 percent. Mean annual precipitation ranges from 40 to 46 inches and is evenly distributed throughout the year. Mean annual temperature ranges from 62 degrees to 64 degrees F. Thornthwaite annual P-E indices range from 64 to 76.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dela, Elysian, and Guyton series. Dela soils occur nearest the stream channel and have a coarse-loamy control section and do not have a water table within 3 feet of the soil surface. Elysian soils are on slightly higher convex mounds, have a coarse-loamy control section and argillic horizons. Guyton soils are on slightly higher concave areas, have a fine-silty control section and have argillic
horizons.
DRAINAGE AND PERMEABILITY: Pushmataha soils are somewhat poorly drained. Runoff is slow and permeability is moderate. A water table is at depth of 0 to 3 feet in spring and winter. They are occasionally or frequently flooded for very brief periods during January through May.
USE AND VEGETATION: Used mainly for growing tame pasture or as forest. Native vegetation is mixed hardwoods such as northern red oak, water oak, green ash, hickory, and maple with some shortleaf pine.
DISTRIBUTION AND EXTENT: Ouachita Mountains of Oklahoma and possibly Arkansas. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Pushmataha County, Oklahoma; 1977.
REMARKS: These soils were formerly classified in the Alluvial great soil group and included in the Philo series.
ADDITIONAL DATA: Sample number S74OK-127-5 from the Soil Survey Investigations Unit at Lincoln, Nebraska indicates this soil has siliceous mineralogy and family texture is coarse-silty.