LOCATION ROXANA LA+AR KY OKEstablished Series
TAXONOMIC CLASS: Coarse-silty, mixed, superactive, nonacid, thermic Typic Udifluvents
TYPICAL PEDON: Roxana very fine sandy loam--grassland.
(Colors are for moist soil unless otherwise stated.)
A--0 to 4 inches; reddish brown (5YR 4/4) very fine sandy loam; weak fine granular structure; very friable; mildly alkaline; abrupt smooth boundary. (3 to 10 inches thick)
C1--4 to 13 inches; brown (7.5YR 4/4) loamy very fine sand; single grained with indistinct remnants of bedding planes throughout; very friable; common fine roots; mildly alkaline; clear smooth boundary. (5 to 26 inches thick)
C2--13 to 22 inches; brown (7.5YR 4/4) very fine sandy loam; massive; very friable; few fine roots; few thin bedding planes; mildly alkaline; clear smooth boundary. (5 to 16 inches thick)
C3--22 to 47 inches; yellowish red (5YR 4/6) very fine sandy loam; massive; very friable; few fine roots; few thin bedding planes; few calcareous spots; mildly alkaline; abrupt smooth boundary. (12 to 26 inches thick)
Ab--47 to 52 inches; dark reddish brown (5YR 3/4) sandy clay loam; weak medium subangular blocky structure; friable; slight effervescence; mildly alkaline; abrupt smooth boundary. (0 to 8 inches thick)
C'--52 to 70 inches; brown (7.5YR 4/4) fine sandy loam; single grained with faint bedding planes; very friable; mildly alkaline.
TYPE LOCATION: Rapides Parish, Louisiana; 5/8 mile northeast of Zimmerman; 150 feet east of gravel road in sec. 63 (Spanish Land Grant), T. 5 N., R. 3 W.
RANGE IN CHARACTERISTICS: Bedding planes are evident in the 10 to 40 inch control section.
The A horizon has hue of 5YR, 7.5YR, or 10YR, value of 3 to 5, and chroma of 4 or 6. It is loamy very fine sand, fine sandy loam, very fine sandy loam, or silt loam, and ranges from slightly acid to moderately alkaline.
The C horizon has hue of 5YR or 7.5YR, value of 4 or 5, and chroma of 3 to 8. Average sand content coarser than very fine sand ranges from 10 to 15 percent in the 10 to 40 inch control section and clay content ranges from 10 to 18 percent. The C horizon is loamy very fine sand, very fine sandy loam, loam, or silt loam. Some pedons have thin strata of coarser or finer textured material in the C horizon. The C horizon ranges from neutral through moderately alkaline. Spots and thin lenses of calcareous materials are in the C horizon of some pedons.
The buried A horizon, where present, is at a depth of 40 inches or more below the soil surface. The Ab horizon, where present, is loam, very fine sand, fine sandy loam, very fine sandy loam, silt loam, silty clay loam, or silty clay.
The C' horizon has the same range in color and texture as the C horizon except texture ranges to fine sandy loam.
COMPETING SERIES: These include the Morganfield series in the same family and the Bruin, Coushatta, Gracemont, Idabel, Keo, Natchez, Norwood, Pulaski, Severn, Sterlington, Vicksburg, and Yahola series. Bruin, Coushatta, Keo, and Natchez soils have cambic horizons. Coushatta and Norwood soils have fine-silty control sections. Gracemont, Idabel, Pulaski, and Yahola soils have more than 15 percent sand coarser than very fine sand. Morganfield soils have hues of 10YR or yellower. Vicksburg soils are strongly or very strongly acid throughout the control section. Norwood, Severn, and Yahola soils are calcareous in all horizons below 10 inches. Sterlington soils have strongly acid to neutral argillic horizons.
GEOGRAPHIC SETTING: Roxana soils are on undulating to level natural levees of streams that carry Permian Red Bed sediments. Slopes are 0 to 8 percent. These soils formed in stratified, loamy alluvium of Permian Red Bed origin. Some areas are subject to rare to frequent flooding. Mean annual rainfall ranges from 42 to 60 inches, and the mean annual temperature ranges from 60 degrees to 70 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Coushatta, Norwood, and Severn series and the Latanier and Moreland series. Latanier soils have mollic epipedons and clayey over loamy textures. Moreland soils have mollic epipedons and are fine-textured throughout.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: Most areas are cleared and are used for pasture. Cotton, soybeans, and corn are cultivated in small areas. Native vegetation is pecan, cottonwood, and willow. The principal pasture grasses are bermudagrass and johnsongrass.
DISTRIBUTION AND EXTENT: Northwest Louisiana, Arkansas, Oklahoma, and Texas. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Rapides Parish, Louisiana; 1972.
REMARKS: There are no diagnostic horizons and features recognized in this pedon: