LOCATION BLEAKWOOD TXEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, active, acid, thermic Fluvaquentic Endoaquepts
TYPICAL PEDON: Bleakwood fine sandy loam--woodland. (Colors are for moist soil unless otherwise stated.)
A--0 to 3 inches; dark grayish brown (10YR 4/2); fine sandy loam; weak fine granular structure; slightly hard, friable; nonsticky and nonplastic, common fine roots; slightly acid; clear smooth boundary. (2 to 11 inches thick)
Bg1--3 to 12 inches; light brownish gray (10YR 6/2) loam; weak medium subangular blocky structure; friable, slightly sticky and slightly plastic; few fine roots; common medium distinct brownish yellow (10YR 6/6) and few fine distinct strong brown (7.5YR 5/6) iron accumulations; very strongly acid; gradual wavy boundary. (9 to 30 inches thick)
Bg2--12 to 30 inches; light brownish gray (10YR 6/2) loam; weak medium subangular blocky structure; friable, slightly sticky and slightly plastic; few fine roots; many fine and medium distinct strong brown (7.5YR 5/6) iron accumulations; very strongly acid; gradual wavy boundary. (10 to 30 inches thick)
Bg3--30 to 45 inches; light brownish gray (10YR 6/2) loam; weak medium subangular blocky structure; friable; slightly sticky and slightly plastic; few fine roots; common medium distinct strong brown (7.5YR 5/6) and few fine faint brownish yellow (10YR 6/6) iron accumulations; very strongly acid; gradual wavy boundary. (0 to 20 inches thick)
Bg4--45 to 80 inches; light brownish gray (10YR 6/2) clay loam; weak medium subangular blocky structure; friable, slightly sticky and moderately plastic; few fine roots; common medium distinct strong brown (7.5YR 5/6) and few fine faint brownish yellow (10YR 6/6) iron accumulations; very strongly acid.
TYPE LOCATION: Jasper County, Texas; from intersection of U.S. Highways 190 and 96 in Jasper; south on U.S. Highway 96 10.4 miles to intersection of Farm Road 2245; 1.1 miles northeast on Farm Road 2245; 150 feet south in woodland. Site is about 50 feet west of Everett Creek.
RANGE IN CHARACTERISTICS: Solum thickness is more than 80 inches. Reaction is strongly acid or very strongly acid except in the surface layer. Organic carbon content ranges from 0.2 to 0.4 percent at a depth of 50 inches below the mineral soil surface.
The A horizon has hue of 10YR or 2.5Y, value of 4 or 5, and chroma of 2 to 4. The A1 horizon is loam, silt loam, or fine sandy loam. Reaction ranges from very strongly acid to slightly acid.
The Bg horizon has hue of 10YR or 2.5Y, value of 5 to 7, and chroma of 1 or 2. Masses of iron accumulation range from few to many in shades of yellow and brown. Texture is fine sandy loam, loam, or clay loam. The weighted average clay content of the 10- to 40- inch control section ranges from 18 to 35 percent clay and contains more than 15 percent sand that is coarser than very fine. A stratified or massive C horizon is in some pedons. It has color and texture similar to the B horizon.
COMPETING SERIES: These are the Angelina and Kinston series in the same family and the similar Bibb, Herod, Mantachie, Nahatche, and Wehadkee series. Angelina soils are very poorly drained, are ponded for long periods of time, and are slowly permeable. Kinston soils typically have a stratified control section and are in slightly cooler temperature regimes. Bibb soils contain less than 18 percent clay in the control section. Mantachie soils have less than 60 percent of the mass between the Ap and 30 inches dominated by chroma of 2 or less and are not as wet. Herod, Nahatche, and Wehadkee soils have a pH of greater than 5.5 in some part of the control section.
GEOGRAPHIC SETTING: Bleakwood soils are on flood plains. Slopes range from 0 to 2 percent. The soils have formed in loamy alluvium. Mean annual precipitation ranges from 46 to 58 inches. Mean annual temperature ranges from 66 to 70 degrees F. Frost-days range from 240 to 260. Elevation ranges 20 to 200 feet. Thornthwaite P-E Index ranges from 80 to 84.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Mantachie series, and the Iuka, Mooreville, Ochlocknee, and Estes series. Iuka and Ochlocknee soils have less than 18 percent clay in the control section. Mooreville soils are less gray and are moderately well drained. Estes soils are more clayey throughout.
DRAINAGE AND PERMEABILITY: Bleakwood soils are poorly drained. Runoff is slow and permeability is moderate. Bleakwood soils are commonly flooded once to several times each year. Water is at or near the surface 6 to 10 months a year.
USE AND VEGETATION: Principal use is hardwood forest; vegetation consists mainly of hardwood trees with understory of shade and water tolerant shrubs and grasses.
DISTRIBUTION AND EXTENT: Mainly in East Texas and Louisiana (MLRA 133B), and possibly in other states. Series is of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Jasper County, Texas; 1980.
REMARKS: Bleakwood soils were formerly included in the Mantachie series. Series was reclassified from a Typic to a Fluvaquentic subgroup 10/2001.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon -- 0 to 3 inches (A horizon)
Fluventic feature -- irregular distribution of organic matter.
Aquic feature -- permanent saturation with water, and a reduced matrix in all horizons below a depth 25 cm from the mineral soil surface.