LOCATION LANDMAN TXEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, semiactive, thermic Grossarenic Paleudalfs
TYPICAL PEDON: Landman loamy fine sand--forested. (Colors are for moist soil unless otherwise stated.)
A--0 to 7 inches; very dark grayish brown (10YR 3/2) loamy fine
sand; weak fine granular structure; slightly hard, very friable; many medium and coarse roots; slightly acid; clear smooth boundary. (4 to 8 inches thick)
E1--7 to 23 inches; light yellowish brown (10YR 6/4) loamy fine
sand; single grained; loose; many fine, medium, and coarse roots; few siliceous pebbles up to 1 inch in diameter; slightly acid; clear smooth boundary. (10 to 40 inches thick)
E2--23 to 43 inches; light yellowish brown (10YR 6/4) loamy fine sand; single grained; loose; common fine, medium, and coarse roots; few fine brown slightly hard to weakly cemented bodies; few siliceous pebbles up to 1 inch in diameter; slightly acid; clear smooth boundary. (18 to 30 inches thick)
E3--43 to 74 inches; light yellowish brown (10YR 6/4) loamy fine sand; massive; friable, slightly brittle; few medium and coarse roots; few thin bands of dark brown (7.5YR 4/4) loamy material that total less than 1 1/2 inches in thickness, bands are wavy and continuous; few siliceous pebbles up to 1 inch in diameter; few black concretions 15 mm in diameter; slightly acid; clear smooth boundary. (20 to 35 inches thick)
Bt1--74 to 82 inches; mottled, grayish brown (10YR 5/2), yellowish brown (10YR 5/8), and red (2.5YR 4/8) sandy clay loam; weak medium subangular blocky structure; very hard, firm; few medium and coarse roots; common fine pores; strongly acid; clear smooth boundary. (4 to 20 inches thick)
Bt2--82 to 90 inches; light brownish gray (2.5Y 6/2) sandy clay
loam; common medium prominent red (10R 4/8) and common medium distinct strong brown (7.5YR 5/8) mottles; weak medium and coarse subangular blocky structure; very hard, firm; few medium and coarse roots; common fine pores; very strongly acid.
TYPE LOCATION: Walker County, Texas; from the intersection of Interstate Highway 45 and Farm Road 1374 at Huntsville, Texas, 9.6 miles southwest on Farm Road 1374; then south on Stubblefield Lake Road 2.8 miles; then west on log road l300 feet and 30 feet south of road.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 80 to more than 100 inches. Thickness of the arenic epipedon ranges from 40 to about 80 inches. However, it is typically 50 to 75 inches thick. Siliceous or ironstone pebbles range from none to few throughout.
The A horizon has hue or 10YR, value of 3 to 6, and chroma of 2 or 3. Some pedons have value of 4 or 5, and chroma of 4. The texture is loamy sand, fine sand, or loamy fine sand. The reaction ranges from strongly acid to slightly acid.
The E horizon has hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 2 to 4. Streaks, mottles or small pockets in shade of brown, yellow or gray range from none to common. Some pedons have thin bands of lamella and/or spots of loamy materials with these colors typically in the lower part. Dark concretions or nodules range from none to common. Texture is loamy sand, fine sand, or loamy fine sand. Reaction ranges from strongly acid to slightly acid.
The Bt horizon has a mottled matrix of the matrix color is in shades of gray or brown with or without yellowish or reddish mottles. The texture is mainly sandy clay loam but some pedons have layers of fine sandy loam, clay loam, or sandy clay. However, the weighted average clay content of the control section ranges from 20 to 35 percent. Dark concretions or nodules range from none to common. The reaction ranges from very strongly acid to slightly acid, but typically is strongly acid or medium acid.
COMPETING SERIES: These are the Kenney, Latch, Lutterloh, and Pickton series and the closely similar Bienville, Boy, Darco, Depcor, Gunter, Larue, and Shankler series. Kenney soils have B2t horizons with hue redder than 7.5YR. Latch soils have sola less than 80 inches thick. Lutterloh soils have a shallower water table. Pickton soils are on uplands. Bienville soils have Bt horizons that are loamy fine sand or that consist of lamella. Boy soils contain more than 5 percent plinthite. Darco, Gunter, and Shankler soils have base saturation less than 35 percent. Depcor and Larue soils have sandy epipedons 20 to 40 inches thick.
GEOGRAPHIC SETTING: Landman soils occupy nearly level to gently sloping low stream terraces 10 to 20 feet above the flood plain. Slope gradients range from 0 to 5 percent. The soil formed in sandy and loamy alluvium. The climate is subhumid. The mean annual temperature ranges from 66 degrees to 69 degrees F, mean annual precipitation ranges from 42 to 50 inches, and Thornthwaite annual P-E index exceeds 64.
GEORGRAPHICALLY ASSOCIATED SOILS: These are the competing Boy, Depcor, and Larue. Boy and Depcor soils are on nearby uplands. Larue soils are on side slopes.
DRAINAGE AND PERMEABILITY: Moderately well drained with little or no runoff. Rapid permeability above the Bt horizon and moderately slow in the Bt horizons. Perched water tables are common in these soils during the winter and spring months.
USE AND VEGETATION: Small acreages in row crops and pasture but mainly in forest. Principal crops are cotton, corn, small grains, and feed crops. Pastures are mainly bermudagrass. Native vegetation is loblolly and shortleaf pine, red oak, and white oak with an understory of American beautyberry, panicums, longleaf uniola, pinehill bluestem, and purpletop.
DISTRIBUTION AND EXTENT: Southern coastal plain of Texas. Moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Walker County, Texas, 1975.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon--0 to 7 inches
Grossarenic feature--0 to 74 inch layer is loamy fine sand
Argillic horizon--74 to 90 inches