LOCATION BOSQUE                  TX

Established Series
Rev. GLL-RMR-RM
08/2017

BOSQUE SERIES

The Bosque series consists of very deep to loamy alluvium, well drained soils that formed in loamy, calcareous alluvium of Pleistocene age derived from limestone and shale. These nearly level soils are on treads of flood plains. Slopes range from 0 to 1 percent. Mean annual precipitation is about 786 mm (30.95 in) and the mean annual air temperature is about 17.7 degrees C (63.8 degrees F).

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Cumulic Haplustolls

TYPICAL PEDON: Bosque loam--in a cultivated field. (Colors are for dry soil unless otherwise stated.)

Ap--0 to 13 cm (0 to 5 in); dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; weak very fine subangular blocky and fine granular structure; slightly hard, friable; strongly effervescent; moderately alkaline; abrupt smooth boundary. (0 to 25 cm [0 to 10 in] thick)

A1--13 to 51 cm (5 to 20 in); dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky and fine granular structure; slightly hard, friable; many pores and wormcasts; common threads and films of calcium carbonate; strongly effervescent; moderately alkaline; gradual smooth boundary. (15 to 51 cm [6 to 20 in] thick)

A2--51 to 97 cm (20 to 38 in); dark brown (10YR 3/3) clay loam, very dark grayish brown (10YR 3/2) moist; weak subangular blocky structure; hard, firm; common threads and films of calcium carbonate; strongly effervescent; moderately alkaline; gradual smooth boundary. (15 to 76 cm [6 to 30 in] thick)

Bw--97 to 127 cm (38 to 50 in); brown (10YR 5/3) clay loam, brown (10YR 4/3) moist; weak subangular blocky structure; very hard, firm; few fine faint dark yellowish brown streaks and spots; common threads and films of calcium carbonate; strongly effervescent; moderately alkaline; gradual smooth boundary. (0 to 140 cm [0 to 55 in] thick)

Akb--127 to 152 cm (50 to 60 in); dark grayish brown (10YR 4/2) clay, very dark grayish brown (10YR 3/2) moist; massive; very hard, firm; few fine faint brown mottles and streaks; many threads and films of calcium carbonate; violently effervescent; moderately alkaline.

TYPE LOCATION: Erath County, Texas; From intersection of Texas Highway 108 and Farm Road 8 in the northern edge of Stephenville, Texas; 6.4 miles west-northwest of Farm Road 8; 0.3 mile east on a county road; 90 ft south of road in cultivated field.

USGS topographic quadrangle: Bunyan, TX;
Latitude: 32 degrees, 14 minutes, 22.71 seconds N;
Longitude: 98 degrees, 18 minutes, 25.002 seconds W.
Datum: WGS84.

RANGE IN CHARACTERISTICS:

Solum depth: greater than 152 cm (60 in)
Soil Moisture: An ustic soil moisture regime that borders on udic. The soil moisture control section is dry in some or all parts for 90 or more cumulative days and moist, in some part, either for more than 180 cumulative days per year, or for 90 or more consecutive days in normal years.
Soil Temperature: 18.9 to 22.2 degrees C (66 to 72 degrees F)
Thickness of the mollic epipedon: 51 to 152 cm (20 to 60 in)
Thickness of the cambic horizon: 0 to 152 cm (0 to 60 in)

Particle-size control section:
Clay content: 20 to 35 percent
Rock fragments: amount-0 to 10 percent; kind-quartzite or limestone; shape-nonflat; size-gravels
Calcium carbonate equivalent: 15 to 30 percent
Identifiable secondary carbonates: amount-0 to 5 percent; kind-carbonate masses; shape-threadlike, size-fine or medium
Reaction: Reaction is slightly alkaline or moderately alkaline and calcareous
Other features: Some pedons have thin, discontinuous fine sandy loam or silt loam strata

A horizon
Hue: 7.5YR or 10YR
Value: 3 to 5
Chroma: 1 or 3 the mollic epipedon ranges from 51 to about 152 cm (20 to about 60 in) thick.
Texture: loam, clay loam, or sandy clay loam.

Bw horizon (absent in some pedons)
Hue: 7.5YR or 10YR
Value: 4 to 6
Chroma: 2 to 4, with or without brownish streaks or mottles.
Texture: is loam, sandy clay loam, or clay loam.

Akb, Ab, or Bwb horizon (where present)
Hue: 7.5YR or 10YR
Value: 3 to 5
Chroma: 1 or 3
Texture: clay or clay loam, but ranges to sandy clay loam. These horizons are typically below the 10- to 40- inch control section and are absent in some pedons.
Identifiable secondary carbonates: amount-2 to 20 percent; kind-carbonate masses; shape-threadlike, size-fine or medium
Other features: Some pedons have brownish Bw or C horizons that range from fine sandy loam to clay.

COMPETING SERIES: These are Baileyboro (TX), Bippus (TX), Gageby (TX), Gowen (TX), Stanford (AZ), and Whitesboro (TX) series. Similar soils are the Bergstrom, Frio, Oakalla, and Venus series.
Baileyboro, Bippus, and Gageby soils: are drier for longer periods of time and receive less than 711 mm (28 in) of annual rainfall.
Gowen, Stanford, and Whitesboro soils are noncalcareous.
Bergstrom soils: have fine-silty control sections.
Frio soils: have fine textured control sections.
Oakalla soils: have carbonatic mineralogy.
Venus soils: have mollic epipedons less than 51 cm (20 in) thick and are on uplands.

GEOGRAPHIC SETTING:
Parent material: calcareous loamy alluvium derived from limestone and shale
Landscape: Hills
Landform: nearly level flood plains of streams
Slope: 0 to 1 percent
Mean annual air temperature: 17.2 to 20.7 degrees C (63 to 69.3 degrees F)
Mean annual precipitation: 711 to 1016 mm (28 to 40 in)
Frost-free period: 220 to 279 days
Elevation: 6.1 to 426.7 m (20 to 1,400 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These include the competing Frio, Deleon, and Venus series. Also associated are Bunyan and Lewisville series.
Bunyan soils: lack mollic epipedons.
Frio soils: have a fine textured particle size control section
Deleon sois: have a fine textured particle size control section and have vertic properties
Lewisville soils: have mollic epipedons less than 51 cm (20 in) thick and contain more than 35 percent clay in the 10- to 40- inch control section.
Venus soils: have molllic epipedons less than 51 cm (20 in) thick and have a calcic horizon within 100 cm (40 in)

DRAINAGE AND PERMEABILITY:
Drainage class: Well.
Permeability class: Moderate.
Runoff: negligible on 0 to 1 percent slopes.
Wetness: the soil floods at 1 to 10 year intervals, except where protected by dikes or dams.

USE AND VEGETATION: Most areas are being farmed to sorghums, small grains, and pecan orchards. Some areas are used for bermudagrass pastures. Native trees are elm, hackberry, pecan, live oak, and cottonwood. Grasses include big and little bluestem, indiangrass, switchgrass, and sideoats grama.

DISTRIBUTION AND EXTENT: This soil occurs mainly in the Grand Prairies (MLRA 85), West Cross Timbers (MLRA 84B), and Blackland Prairies (MLRA 86A) of north-central Texas. It is of large extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Erath County, Texas; 1970.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Mollic epipedon: 0 to 97 cm (0 to 38 in) (A horizons)
Cambic horizon: 97 to 127 cm (38 to 50 in) (Bw horizon)
Other features: calcareous to the surface and have an irregular decrease in organic matter through the solum.

ADDITIONAL DATA: none

Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014

---

National Cooperative Soil Survey
U.S.A.