LOCATION HEADRICK           OK

HEADRICK SERIES

TAXONOMIC CLASS: Fine-loamy, mixed, active, thermic Oxyaquic Haplustalfs

TYPICAL PEDON: Headrick loamy sand--on 0.2 percent slope in cropland. (Colors are for dry soil unless otherwise stated.)

Ap--0 to 5 inches; light brown (7.5YR 6/3) loamy sand, brown (7.5YR 4/3) moist; weak fine and medium granular structure; soft, friable; common very fine and fine and few medium roots; noneffervescent; slightly acid; abrupt smooth boundary. (5 to 19 inches thick)

Bt--5 to 32 inches; reddish brown (5YR 5/4) sandy clay loam, reddish brown (5YR 4/4) moist; weak coarse prismatic structure parting to moderate medium subangular blocky; hard, firm; common very fine and fine roots; common distinct clay films on surface of peds; noneffervescent; neutral; clear wavy boundary. (15 to 50 inches thick)

2Btb--32 to 52 inches; dark grayish brown (10YR 4/2) clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; very hard, very firm; few very fine and fine roots; many distinct clay films on surface of peds; very slightly effervescent; moderately alkaline; gradual smooth boundary.

2Btkb--52 to 66 inches; brown (10YR 5/3) clay loam, brown (10YR 4/3) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; very hard, very firm; few very fine and fine roots; common faint clay films on surface of peds; common fine and medium masses of iron-manganese; common fine and medium threads of calcium carbonate; strongly effervescent; moderately alkaline; gradual smooth boundary. (Combined thickness of the 2Btb horizons is 15 to 40 inches)

2BCkb--66 to 85 inches; pale brown (10YR 6/3) sandy clay loam, brown (10YR 5/3) moist; moderate medium and coarse prismatic structure; very hard, firm; few very fine and fine roots; common fine and medium threads of calcium carbonate; common fine and medium strong brown (7.5YR 4/6) and common fine and medium brown (7.5YR 5/3) iron accumulations; strongly effervescent; moderately alkaline.

TYPE LOCATION: Jackson County, OK; from the intersection of U. S. Highways 283 and 62 in Altus; 13 miles east on highway 62; 2.45 miles north on county road; 3000 feet east in cropland. (2400 feet north and 3000 feet east of the southwest corner of sec. 4, T.2 N., R.18 W.); Latitude: 34N, 40, 25; Longitude: 99W, 5, 44; Long Mountain - USGS topographic quadrangle; North American Datum-1927.

RANGE IN CHARACTERISTICS:
Particle-size control section (weighted average)
Clay content: 18 to 35 percent
CEC/clay ratio: 0.4 to 0.6
Thickness of the solum: 60 to more than 80 inches
Depth to a discontinuity: 30 to 60 inches
Depth to secondary calcium carbonate: 30 to more than 60 inches
Depth to redox features (where present): 20 to 40 inches
Depth to episaturation: 20 to 40 inches

A Horizon
Hue: 7.5YR or 10YR
Value: 4 to 6 (3 to 5 moist)
Chroma: 3 or 4
Texture: loamy sand, loamy fine sand, or fine sandy loam
Effervescence: noneffervescent
Reaction: slightly acid to moderately alkaline (6.1-8.4)

Bt Horizon
Hue: 2.5YR to 10YR
Value: 4 to 6 (3 to 5 moist)
Chroma: 2 to 6
Texture: sandy clay loam or fine sandy loam
Clay content: 15 to 30 percent
Redox accumulations: none to common, fine or medium, faint or distinct in shades of red or yellow
Redox depletions: none to common, fine or medium, distinct or prominent in shades of brown; in shades of gray below 30 inches.
Iron-manganese accumulations: 0 to 5 percent, fine or medium, masses or concretions
Effervescence: noneffervescent to slightly effervescent
Calcium carbonate equivalent: 0 to 3 percent
Visible calcium carbonate: 0 to 3 percent, fine or medium, concretions or masses
Reaction: neutral to moderately alkaline (6.6-8.4)

BC Horizon (where present)
Has color, texture, and reaction similar to the Bt horizon

2Btb Horizon
Hue: 2.5YR to 10YR
Value: 4 to 6 (3 to 5 moist)
Chroma: 2 to 6
Texture: clay loam or clay
Clay content: 30 to 50 percent
Redox accumulations: none to common, fine or medium in shades of red, or yellow.
Redox depletions: none to common, fine or medium, faint or distinct in shades of gray or brown.
Iron-manganese accumulations: 0 to 5 percent, fine or medium, masses or concretions
Coarse fragments: 0 to 5 percent, rounded quartzite gravel
Effervescence: noneffervescent to strongly effervescent
Calcium carbonate equivalent: 1 to 15 percent
Visible calcium carbonate: 0 to 5 percent, fine or medium, concretions, masses, or threads
Reaction: neutral to moderately alkaline (6.6-8.4)

2BCkb Horizon
Hue: 2.5YR to 10YR
Value: 4 to 6 (3 to 5 moist)
Chroma: 2 to 6
Texture: clay loam, sandy clay loam, silty clay loam, silty clay, or clay
Clay content: 30 to 50 percent
Redox features: Most pedons have few or common, fine or medium iron depletions or concentrations in shades of gray, brown, red, or yellow.
Iron-manganese accumulations: 0 to 5 percent, fine or medium, masses or concretions
Coarse fragments: 0 to 5 percent, rounded quartzite gravel
Effervescence: very slightly effervescent to strongly effervescent
Calcium carbonate equivalent: 1 to 15 percent
Visible calcium carbonate: 0 to 5 percent, fine or medium, concretions, masses, or threads
Reaction: moderately alkaline (7.9-8.4)

3C Horizon (where present)
Hue: 2.5YR or 5YR
Value: 4 or 5 (3 or 4 moist)
Chroma: 4 or 6
Texture: clay loam, silty clay loam, silty clay, or clay Permian redbed sediments
Effervescence: slightly effervescent to strongly effervescent
Reaction: moderately alkaline

COMPETING SERIES: There are no series in the same family. Similar soils are the Decobb, Grandfield, Grandmore, Meno, McKnight, and Solvay series.
Decobb and Grandfield series: do not have a discontinuity in the lower part of the solum.
Grandmore series: do not have a perched water table within 40 inches of the surface.
Meno and Solvay series: do not have a discontinuity in the lower part of the solum and have an apparent water table.
McKnight series: have a solum less than 50 inches thick over soft claystone or sandstone.

GEOGRAPHIC SETTING:
Parent material: Sandy eolian and loamy alluvium derived from Pleistocene age sediments.
Landform: Nearly level broad flat to concave areas on terraces.
Slope: 0 to 1 percent
Mean annual temperature: 59 to 64 degrees F.
Mean annual precipitation: 22 to 32 inches
Frost-free period: 200 to 230 days
Elevation: 1,000 to 2,000 feet
Thornthwaite annual P-E indices: 32 to 44

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Devol, Eda, Grandfield, Grandmore, and McKnight series.
Devol series: Occur on higher ridges and have a coarse-loamy particle-size control section.
Eda series: Occur on higher ridges and have a sandy particle-size control section.
Grandfield and McKnight series: Occur on slightly higher, broad, convex or hummocky areas.
Grandmore series: Occur on similar to slightly higher interdunal areas that are slightly convex to hummocky.

DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Moderately slow permeability. Runoff is low. Perched water table is 20 to 40 inches from the surface for 30 or more cumulative days mainly during October to May of most years.

USE AND VEGETATION: Used mainly as cropland or pasture. Wheat, grain sorghum, cotton, and improved bermudagrass are the principal crops. Native vegetation is mid and tall grasses.

DISTRIBUTION AND EXTENT: Central Rolling Red Plains of western Oklahoma and northwest Texas; LRR H; MLRA 78C; Extent is moderate.

MLRA OFFICE RESPONSIBLE: Temple, Texas.

SERIES ESTABLISHED: Jackson County, OK, 2000. The name Headrick is from a small town in the county.

REMARKS: These soils were included with the Grandmore or Miles series in previous surveys.

Diagnostic horizons and features recognized in this pedon are:

Particle size control section--5 to 25 inches (Bt horizon).

Ochric epipedon--0 to 5 inches (Ap horizon).

Argillic horizon--5 to 66 inches (Bt & 2Btb horizons).

Episaturation (perched water table)--the zone of saturation at 32 to 52 inches (2Btb horizon).

Lithologic discontinuity--at the upper boundary of the 2Btb horizon.

Cation-exchange activity class supported by NSSL laboratory data (S96OK-065-001).

Range Site: Seep Meadow - 078CY089OK

ADDITIONAL DATA: NSSL data from (S96OK-065-001) Jackson Co. OK.

TAXONOMIC VERSION: Soil Taxonomy, Second Edition, 1999.