LOCATION FLORESVILLE TX

Established Series
Rev.FBT-MLG-CKH
11/2013

FLORESVILLE SERIES

The Floresville series consists of very deep, well drained, slowly permeable soils that formed in loamy alluvium and/or residuum dervived from sandstone of Tertiary age. These nearly level to gently sloping soils occur on broad interfluves or ridges. Slope ranges from 0 to 5 percent. Mean annual precipitation is about 736 mm (29 in) and the mean annual temperature is about 22.2 degrees C (72 degrees F).

TAXONOMIC CLASS: Fine, mixed, active, hyperthermic Typic Paleustalfs

TYPICAL PEDON: Floresville fine sandy loam, west facing, convex, 2 percent slope in rangeland; elevation is 130 meters (425 feet). (Colors are for dry soil unless otherwise stated.)

A1--0 to 25 cm (0 to 10 in; 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. (15 to 38 cm [6 to 15 in] thick)

Bt1--25 to 53 cm (10 to 21 in); 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. (13 to 51 cm [5 to 20 in] thick)

Bt2--53 to 76 cm (21 to 30 in); 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. (15 to 56 cm [6 to 22 in] thick)

Bt3--76 to 94 cm (30 to 37 in); 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; moderately alkaline; gradual wavy boundary. (10 to 66 cm [4 to 26 in] thick)

Bk--94 to 112 cm (37 to 44 in); 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. (15 to 51 cm [6 to 20 in] thick)

BCk--112 to 165 cm (44 to 65 in); 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. USGS topographic quadrangle: DeWees, Texas; Latitude: 29 degrees 1 minute 9.57 seconds N; Longitude: 98 degrees 13 minutes 22.10 seconds W; Datum: WGS84.

RANGE IN CHARACTERISTICS:
Soil Moisture: A typic-ustic moisture regime. The soil moisture control section is dry in some or all parts for more than 90 days but less than 180 cumulative days in normal years.
Mean annual soil temperature: 22.2 to 24.4 degrees C (72 to 76 degrees F).
Depth to secondary carbonates: 71 to 102 cm (28 to 40 in)
Coarse fragments: 1 to 5 percent, channers and gravel

Particle-size control section (weighed average):
Clay content: 35 to 50 percent

A horizon:
Hue: 2.5YR to 10YR
Values: 3 to 5
Chroma: 3 to 6
Texture: fine sandy loam, loam, or loamy fine sand
Clay content: 8 to 20 percent
Coarse fragments: 0 to 5 percent; subangular, sandstone gravel and channers
Effervescence: none
Raction: slightly acid or neutral.

Bt horizons:
Hues: 2.5YR to 7.5YR
Values: 4 and 5
Chroma: 4 and 6
Texture: clay, sandy clay, or sandy clay loam
Clay content: 30 to 50 percent
Coarse fragments: 0 to 5 percent; subangular, sandstone gravel and channers
Calcium carbonate equivalent: 0 to 5 percent
Effervescence: none
Reaction: slightly acid to moderately alkaline

Btk horizon: (where present)
Hue: 2.5YR to 7.5YR
Value: 5 and 6
Chroma: 6 or 8
Texture: sandy clay loam, sandy clay, or clay
Clay content: 30 to 45 percent
Coarse fragments: 0 to 5 percent; subangular, sandstone gravel and channers
Identifiable calcium carbonate: 0 to 10 percent; concretions, films, masses, and threads
Calcium carbonate equivalent: 3 to 15 percent
Reaction: moderately alkaline

Bk horizon:
Hue: 2.5YR to 7.5YR
Value: 5 and 6
Chroma: 6 or 8
Texture: sandy clay loam or sandy clay
Clay content: 30 to 45 percent
Coarse fragments: 0 to 5 percent; subangular, sandstone gravel and channers
Identifiable calcium carbonate: 0 to 10 percent; concretions, films, masses, and threads
Calcium carbonate equivalent: 3 to 15 percent
Reaction: moderately alkaline

BCk or Ck (where present) horizon:
Hues: 5YR through 10YR
Value: 4 to 6
Chroma: 5 to 8
Texture: fine sandy loam, sandy clay loam, or clay loam; some pedons have thinly interbedded strata of weakly cemented sandstone
Clay content: 19 to 34 percent
Coarse fragments: 0 to 5 percent; subangular, sandstone gravel and channers
Identifiable calcium carbonate: 0 to 10 percent; concretions, films, masses, and threads
Calcium carbonate equivalent: 5 to 20 percent
Reaction: moderately alkaline

COMPETING SERIES: These are the Miguel (TX) and Wilco (TX) series in the same family. Similar soils include the Devine (TX), Papalote (TX), and Webb (TX) series.
Devine soils: contain more than 35 percent by volume of rock fragments in their Bt horizons
Miguel and Papalote soils: have redoxomorphic concentrations in the upper Bt horizons.
Wilco soils: have secondary calcium carbonate at depths of more than 102 cm (40 in)
Webb soils: smectitic mineralogy; are dry in the moisture control section for longer periods during the growing season

GEOGRAPHIC SETTING:
Parent Material: loamy alluvium and/or residuum dervived from sandstone of Tertiary age
Landscape: inland dissected coastal plain
Landform: broad interfluves or ridges
Slope: 0 to 5 percent
Mean annual precipitation: 660 to 813 mm (26 to 32 in)
Precipitation pattern: June through August and December through February are the driest months. These soils are intermittently moist in September through November and March through May.
Thornthwaite annual P-E indices: 32 to 44
Mean annual temperature: 21.1 to 23.3 degrees C (70 to 74 degrees F.)
Frost free period: 275 to 300 days
Elevation: 70.1 to 240.8 m (230 to 790 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Miguel (TX) and Wilco (TX) series and the Clareville (TX), Coy (TX), and Zavala (TX) series.
Clareville soils: occur on lower positions and have mollic epipedons greater than 50 cm (20 in) thick
Coy soils: have mollic epipedons, vertic properties, and occur on terraces and broad flats associated with drainageways
Zavala soils: do not have an argillic horizon and occur on lower flood plains
Wilco soils: occur on slightly higher positions.

DRAINAGE AND PERMEABILITY: Well drained; Runoff is medium to high; Permeability is slow.

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: Northern Rio Grande Plain of Texas, LRR I, MLRA 83A. The series is of large extent with over 100,000 acres.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) 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 previously included with the Webb series.

Edited 11/2013 (RFG-CKH): updated the competing series, associated soils, and geographic setting sections.

Diagnostic horizons and features in this pedon are:
Ochric epipedon - 0 to 25 cm (0 to 10 in).
Argillic horizon - 25 to 94 cm (10 to 37 in).

ADDITIONAL DATA: Lab data was performed on 1 pedon from McMullen County at the local project office.

Taxonomic version: Keys to Soil Taxonomy, Eleventh Edition, 2010

National Cooperative Soil Survey
U.S.A.