Kiomatia and Oklared soils are on lower flood plains and terraces. Caspiana and Garton soils are on slightly higher terraces and have an argillic horizon. The Boxville, Karma, and Whakana soils are on distinct higher terraces above flooding and have an argillic horizon. GEOGRAPHICALLY ASSOCIATED SOILS: These are the Thornthwaite annual P-E index ranges from 60 to 80. Elevation is 140 to 305 meters (460 to 1000 feet) above mean sea level. Mean annual temperature ranges from 15 to 18 degrees C (57 to 64 degrees F). Mean annual precipitation ranges from 940 to 1140 mm (37 to 45 inches). The soils formed in clayey or loamy alluvium derived mostly from Permian red beds. GEOGRAPHIC SETTING: Roebuck soils occur on level to slightly concave flood plains. Houlka soils do not have a hue of 7.5YR to 2.5YR in the subsoil. Some pedons have a 2C layer stratified with thin layers of silt loam, loam, or fine sandy loam. Redoximorphic features: concentration masses are shades of brown or red, depletion masses in shades of gray Texture: clay or silty clay, less common clay loam or silty clay loam Reaction: slightly acid to moderately alkaline Texture: clay loam, silty clay loam, clay, or silty clay Redoximorphic features: concentration masses are shades of brown or red Special features: some pedons have buried A horizons below 2 feet 95.997972 degrees, WGS 84.ĭepth to secondary carbonates: greater than 102 cm (40 inches) USGS Okmulgee South, Oklahoma topographic quadrangle lat. TYPE LOCATION: Okmulgee County, Oklahoma about 1/2 mile west of Okmulgee about 200 feet south and 200 feet west of the northeast corner of sec. Ĭ-114 to 183 cm (45 to 72 inches) reddish brown (5YR 4/4) clay, reddish brown (5YR 5/4) dry massive very hard, firm few roots common fine distinct yellowish red (5YR 5/6) redoximorphic concentration masses and few fine distinct gray (5YR 5/1) redoximorphic depletion masses slightly alkaline. īw-25 to 114 cm (10 to 45 inches) dark reddish brown (5YR 3/3) clay, reddish brown (5YR 4/3) dry weak medium and coarse subangular blocky structure very hard, firm common fine roots few slickensides few wormcasts common fine distinct yellowish red (5YR 4/6) redoximorphic concentration masses few fine dark manganese concretions slightly acid gradual smooth boundary. (Colors are for moist soil unless otherwise stated.)Ī-0 to 25 cm (0 to 10 inches) dark reddish brown (5YR 3/3) clay, reddish brown (5YR 5/3) dry moderate medium and fine granular structure very hard, firm common fine roots few wormcasts common fine distinct yellowish red (5YR 4/6) redoximorphic concentration masses slightly acid gradual smooth boundary. TYPICAL PEDON: Roebuck clay, in a forest on a floodplain at an elevation of 195 meters (640 feet) above mean sea level. TAXONOMIC CLASS: Fine, smectitic, thermic Aeric Epiaquerts Mean annual temperature is about 16 degrees C (61 degrees F). Mean annual precipitation is 1040 mm (41 inches). These level to slightly concave soils are on broad smooth flood plains of streams that drain through back slough positions on terraces of large streams. The Roebuck series consists of very deep, somewhat poorly drained soils that formed in clayey and loamy alluvium derived mostly from the Permian red beds. Official Series Description - ROEBUCK Series
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