LOCATION VAUGHAN TXEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, active, thermic Typic Epiaqualfs
TYPICAL PEDON: Vaughan fine sandy loam--cropland. (Colors are for dry soil unless otherwise stated.)
Ap--0 to 8 inches; very pale brown (10YR 7/3) fine sandy loam, pale brown (10YR 6/3) moist; single grained; loose, very friable; many fine roots; slightly acid; clear smooth boundary. (4 to 8 inches thick)
A2--8 to 17 inches; light brownish gray (10YR 6/2) fine sandy loam, grayish brown (10YR 5/2) moist; few fine faint brownish yellow (10YR 6/6); weak coarse redox concentrations angular blocky structure parting to single grained; soft, very friable; many fine roots; slightly acid; abrupt smooth boundary. (5 to 10 inches thick)
Btg1--17 to 41 inches; gray (10YR 6/1) sandy clay loam, gray (10YR 5/1) moist, common coarse distinct yellow (10YR 7/6), brownish yellow (10YR 6/6), olive yellow (2.5Y 6/6) and light olive brown (2.5Y 5/6) redox concentrations; moderate coarse angular blocky structure; very hard, very firm; few fine roots; common fine and very fine pores; common thin clay films on faces of peds; few black concretions; moderately alkaline; gradual smooth boundary. (20 to 40 inches thick)
Btg2--41 to 56 inches; gray (10YR 6/1) sandy clay loam, gray (10YR 5/1) moist; many medium distinct yellow (10YR 7/6), brownish yellow (10YR 6/6), light yellowish brown (2.5Y 6/4) and light olive brown (2.5Y 5/4) redox concentrations; moderate coarse angular blocky structure; very hard, very firm; few fine roots; few fine and very fine pores; common thin clay films on faces of peds; common black concretions; moderately alkaline; gradual smooth boundary. (10 to 20 inches thick)
Bgky--56 to 80 inches; light gray (10YR 7/1) clay loam, gray (10YR 6/1) moist, many medium distinct light yellowish brown (2.5Y 6/4) and light olive brown (2.5Y 5/4) redox concentrations; weak coarse angular blocky structure; very hard, very firm; few fine roots; few fine pores; few thin clay films on faces of peds; many calcium carbonate concretions; many masses of calcium carbonate; common crystals of gypsum; many black concretions; moderately alkaline.
TYPE LOCATION: Hill County, Texas; about 11 miles northwest of Hillsboro. West from Hillsboro on State Highway 22 about 7 miles to Farm Road 3050; north on 3050 for 3.25 miles, east on unimproved road and north 0.75 mile. Site is 310 yards east in pasture.
RANGE IN CHARACTERISTICS: Solum thickness is greater than 80 inches.
The Ap or A1 horizon has hue of 10YR, value of 5 to 7 and chroma of 2 to 4. Texture is loamy fine sand or fine sandy loam. Reaction ranges from medium acid to moderately alkaline. The A2 horizon is similar to the Ap or A1 horizon in texture and reaction but color values range from 5 to 7 and chroma is 2 or 3, primarily in 10YR hue.
The Bgt horizon has hue of 7.5YR or 10YR, value of 4 to 6, and chroma of 1 or 2. Redox concentrations are common or many in hue of 2.5Y, value of 4 to 7 and chroma of 3 to 6. Texture is sandy clay loam or clay loam with clay content ranging from 20 to 35 percent. Reaction ranges from moderately acid to moderately alkaline.
The Bgt2 horizon has hue of 7.5YR, or 10YR, value of 4 to 6 and chroma of 1 or 2. Redox concentrations are common or many in hue of 7.5YR to 2.5Y, value of 4 to 6 and chroma of 3 to 6. Texture is sandy clay loam or clay loam. Reaction ranges from neutral to moderately alkaline.
The Bgky horizon has hue of 7.5YR or 10YR, value of 5 to 7 and chroma of 1 or 2. Texture is sandy clay loam or clay loam. Redox concentrations are common or many in hue of 7.5YR, 10YR or 2.5Y, value of 5 or 6 and chroma of 4 to 6. Segregated masses of calcium carbonate and fine black concretions range from few to many. Reaction is slightly alkaline or moderately alkaline.
COMPETING SERIES: There are no competing series. Similar soils are the Alusa, Arol, Crowley, Falba, Mabank, Mamou, Tenot, and Zachary series. Alusa, Arol, Crowley, Falba, and Mabank soils have more than 35 percent clay in the control section. Mamou, Tenot, and Zachary soils have less than 15 percent sand that is coarser than very fine sand.
GEOGRAPHIC SETTING: Vaughan soils are on nearly level to concave upland drainageways. Slope ranges from 0 to 1 percent. The soil formed in deep loamy alluvial and colluvial sediments. Some areas contain a thin overwash of sandy and loamy material. The climate is moist subhumid. Mean annual precipitation ranges from 28 to 35 inches and mean annual temperature ranges from 64 to 69 degrees F. Frost free days range from 220 to 260 days and elevation ranges from 500 to 800 feet. Thornthwaite P-E indices range from 48 to 62.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Axtell, Coving, Crosstell, Eufaula, Gasil, Konsil, and Silstid series. Axtell and Crosstell soils have more than 35 percent clay in the control section. Coving soils have sandy surface layers 20 to 40 inches thick. Eufaula soils have discontinuous Bt horizons and sandy control sections. Gasil, Konsil, and Silstid soils lack gray colors in the Bt horizon.
DRAINAGE AND PERMEABILITY: Poorly drained; Runoff is low. Permeability is slow. The soil is saturated to the surface for a few weeks during the cool season and during storm periods. Water is above the surface for a few days.
USE AND VEGETATION: Mostly in native rangeland and improved pasture. Some areas are cropped and used for feed crops and small grain. Native vegetation consists of sedges, vines, briers, switchgrass, indiangrass, and shrubs. A few cottonwood, pecan, and willow trees occur on these soils in some areas.
DISTRIBUTION AND EXTENT: North central Texas in small drains in the East Cross Timbers land resource area. These soils are of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Hill County, Texas; 1975
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 17 inches (Ap Horizon)
Argillic horizon - 17 to 56 inches (Btg horizons)
Redoximorphic features - Color value of 3 or more, chroma of 2 or less with redox concentrations within 30 inches of the surface.