LOCATION FLORESVILLE TXEstablished Series
TAXONOMIC CLASS: Fine, mixed, active, hyperthermic Typic Paleustalfs
TYPICAL PEDON: Floresville fine sandy loam--rangeland. (Colors are for dry soil unless otherwise stated.)
A1--0 to 10 inches; reddish brown (5YR 5/4) fine sandy loam, reddish brown (5YR 4/4) moist; weak fine subangular blocky structure; hard, friable; many fine roots; few flat fragments of ironstone less than 1 inch across long axis; slightly acid; abrupt smooth boundary. (6 to 15 inches thick)
Bt1--10 to 21 inches; red (2.5YR 4/6) clay, dark red (2.5YR 3/6) moist; weak coarse prismatic structure parting to moderate medium and fine blocky; very hard, firm; common fine roots; few fine and very fine pores; distinct continuous clay films on peds; patchy dark stains on vertical faces of peds; few flat fragments of ironstone less than 1 inch across long axis; slightly acid; gradual wavy boundary. (5 to 20 inches thick)
Bt2--21 to 30 inches; red (2.5YR 4/6) sandy clay, dark red (2.5YR 3/6) moist; moderate medium and fine blocky structure; very hard, firm; few roots; distinct continuous clay films on faces of peds; few dark streaks or stains on faces of peds; few flat fragments of ironstone less than 1 inch across long axis; neutral; gradual wavy boundary. (6 to 22 inches thick)
Bt3--30 to 37 inches; yellowish red (5YR 5/6) sandy clay loam, yellowish red (5YR 4/6) moist; moderate medium blocky structure, very hard, firm; few fine pores; common clay films on faces of peds; few flat fragments of ironstone less than 1 inch across long axis; mildly alkaline; gradual wavy boundary. (4 to 26 inches thick)
Bk--37 to 44 inches; reddish yellow (5YR 6/8) sandy clay loam, yellowish red (5YR 5/8) moist; weak medium blocky structure; hard, friable; estimated 3 percent by volume of soft masses and concretions of calcium carbonate; slightly effervescent; moderately alkaline; gradual wavy boundary. (6 to 20 inches thick)
BC--44 to 65 inches; reddish yellow (5YR 6/6) sandy clay loam, yellowish red (5YR 5/6) moist; common fine faint yellowish red (5YR 5/8) and brownish yellow (10YR 6/8) mottles; weak coarse subangular blocky structure; hard, friable; few fine calcium carbonate concretions; slightly effervescent; moderately alkaline.
TYPE LOCATION: Wilson County, Texas; from the intersection of U.S. Highway 181 and Farm Road 541 in Poth; 7.0 miles west on Farm Road 541 to DeWees community; 1.0 mile north on Farm road 1344; 3.1 miles west on county road. Site is 255 feet north of road.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to 80 inches. The depth to secondary carbonates ranges from 28 to 40 inches. Fragments of ironstone are in most pedons, comprising from 1 to 5 percent of the volume of any horizon.
The A horizon has hues of 2.5YR through 7.5YR, with values of 4 and 5, and chromas of 3 through 6. It is fine sandy loam, loam, or loamy fine sand that is slightly acid or neutral.
The Bt horizons have hues of 2.5YR and 5YR, with values of 4 and 5, and chromas of 4 and 6. Texture is clay or sandy clay with a clay content of 35 to 50 percent. Reaction is slightly acid through moderately alkaline.
The BK horizon where present has hues of 2.5YR to 7.5YR, with values of 5 and 6, and chromas of 6 or 8. Texture is sandy clay loam or sandy clay that is mildly or moderately alkaline. Calcium carbonate makes up 0 to 10 percent by volume of secondary films, threads, bodies, and concretions.
The BC horizon has hues of 5YR through 10YR. It is fine sandy loam, sandy clay loam, or clay loam that may contain thin strata of weakly consolidated sandstone.
COMPETING SERIES: These are the Miguel, Papalote, and Wilco series and the similar Devine and Webb series. Devine soils contain more than 35 percent by volume of rock fragments in their Bt horizons. Miguel, Papalote, and Wilco soils have mottled Bt horizons. Wilco soils have secondary calcium carbonate at depths of more than 40 inches and are dry in the moisture control section for longer periods.
GEOGRAPHIC SETTING: Floresville soils occur on nearly level to gently sloping uplands. Slope gradients range from 0 to 5 percent. The soil formed in loamy materials several feet thick with thin strata of sandstone. Average annual precipitation ranges from 26 to 32 inches and the Thornthwaite annual P-E index is from 32 to 44. The mean annual temperature ranges from 70 degrees to 74 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Miguel and Wilco series and the Clareville series. Clareville and Miguel soils occur at lower elevations and Clareville soils have mollic epipedons. Wilco soils occur at higher elevations.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; slow permeability.
USE AND VEGETATION: Used for rangeland, cropland, and pasture. Main crops are grain sorghums, corn, and cotton. Pastures are mainly improved bermudagrass. Present native vegetation includes bristlegrasses, windmillgrasses, threeawns, mesquite, whitebrush, blackbrush, and pricklypear cactus.
DISTRIBUTION AND EXTENT: Northeastern part of the Rio Grande Plain of Texas. The series is of large extent with over 100,000 acres.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Wilson County, Texas; 1972.
REMARKS: This soil would have been classified in the Reddish Chestnut great soil group. This soil was separated from the Webb series.
Diagnostic horizons and features in this pedon are:
Ochric epipedon - 0 to 10 inches.
Argillic horizon - 10 to 37 inches.