LOCATION WHITESBORO TXEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, thermic Cumulic Haplustolls
TYPICAL PEDON: Whitesboro loam, on a nearly level slope in pasture. (Colors are for dry soil unless otherwise stated.)
A1--0 to 19 inches; dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; moderate medium granular structure; hard, friable, sticky and plastic; many fine roots; few fine pores; neutral; gradual smooth boundary.
A2--19 to 27 inches; dark grayish brown (10YR 4/2) sandy clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; hard, firm, sticky and plastic; common fine roots; common fine pores; few medium faint gray (10YR 5/1) iron depletions, and common fine distinct reddish brown (5YR 4/4) masses of iron accumulation; slightly acid; gradual smooth boundary. (combined thickness of the A horizon 7 to 40 inches)
Bw1--27 to 39 inches; brown (7.5YR 5/4) clay loam, dark brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; hard, firm, sticky and plastic; few fine roots; common fine pores; many medium distinct reddish brown (5YR 4/4) masses of iron accumulation, and common medium distinct gray (10YR 6/1) iron depletions; slightly acid; gradual boundary. (8 to 20 inches thick)
Bw2--39 to 80 inches; mixed gray (10YR 6/1) and reddish yellow (7.5YR 6/6) sandy clay loam; weak medium subangular blocky structure; hard, firm, sticky and plastic; few fine roots; common fine iron-manganese concretions; moderately alkaline.
TYPE LOCATION: Grayson County, Texas; from the intersection of U.S. Highway 82 and Farm Road 901 in the south edge of Sadler, Texas, 1.1 miles north on Farm Road 901; then 0.9 mile east and north on unpaved county road; then 0.2 mile north on field road and 0.1 mile east in pasture.
RANGE IN CHARACTERISTICS: The solum is more than 60 inches thick. The mollic epipedon ranges from 20 to about 60 inches thick. The texture of the particle-size control section is loam, sandy clay loam, or clay loam with clay content ranging from 22 to 35 percent.
The A horizon has hue of 10YR or 7.5YR, value of 2 to 5, and chroma of 1 to 3. There are few to common redoximorphic concentrations and/or depletions in shades of brown and gray within a depth of 24 to 40 inches of the surface. Texture is fine sandy loam, loam or clay loam in the upper part of the A horizon and includes sandy clay loam in the lower part of the A horizon. Reaction ranges from slightly acid to slightly alkaline.
The B horizon has hue of 7.5YR, 10YR, or 2.5Y, value of 4 or 5, and chroma of 1 to 4. There are few to many redoximorphic concentrations and/or depletions in shades of brown, gray, red, or yellow, and some pedons have a mixed matrix of these colors. Texture is clay loam, loam, or sandy clay loam. Reaction ranges from slightly acid to slightly alkaline in the upper part and neutral to moderately alkaline in the lower part. This soil does not have aquic conditions in most years. Redox features are contemporary but they have formed during wet years.
COMPETING SERIES: These include the Bippus (TX), Bosque (TX), Gageby (TX), Gowen (TX), and Kaski (KS) soils. Similar soils are the Gowker, Gowton and Hooks series. These soils are well drained and do not have redoximorphic features within 40 inches of the surface.
GEOGRAPHIC SETTING: Whitesboro soils are on nearly level flood plains. They are occasionally or frequently flooded. Slope gradients are 0 to 1 percent. The soil formed in loamy alluvium. Mean annual precipitation ranges from 34 to 40, and mean annual temperature ranges from 63 to 70 degrees F. Frost free days range from 225 to 275 days, and elevation ranges from 175 to 575 feet. Thornthwaite P-E indices ranges from 54 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Aubrey, Callisburg, Crosstell, Edge, Gasil, Konsil, Sandow, Wilson, and Zilaboy series. Aubrey, Callisburg, Crosstell, Edge, Gasil, Konsil, and Wilson soils are on higher adjacent uplands and they have argillic horizons. Sandow soils lack mollic epipedons. Zilaboy soils have more than 35 percent clay in the control section. Sandow and Zilaboy are on similar floodplains.
DRAINAGE AND PERMEABILITY: Moderately well drained. Permeability is moderate. Runoff is negligible. A water table is at a depth of 2 to 5 feet for periods of 10 to 29 cumulative days during most years from October to May. During wet years, one to three in a ten year period, the water table is present for 30 to 90 days.
USE AND VEGETATION: Mainly used for bermudagrass pasture. Occasionally flooded areas are cultivated to crops such as small grains, grain sorghums and peanuts. Overstory vegetation includes pecan, hackberry, cottonwood, and elm. Native vegetation is mainly little bluestem, big bluestem, indiangrass, switchgrass, eastern gramagrass and Virginia wildrye.
DISTRIBUTION AND EXTENT: The soil is mainly in the mixed post oak and prairie areas of Texas, and possibly in Oklahoma. The soils are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Grayson County, Texas; 1977.
REMARKS: These soils were formerly mapped in the Gowen series.
Superactive cation exchange activity class. Diagnostic horizons and features recognized in the pedon are:
Mollic epipedon - 0 to 27 inches (A horizon.)
Cambic horizon - 27 to 72 inches (Bw horizon.)
SOIL INTERPRETATION NUMBER: TX0755