LOCATION DOUCETTE TX+LAEstablished Series
TAXONOMIC CLASS: Loamy, siliceous, semiactive, thermic Arenic Plinthic Paleudults
TYPICAL PEDON: Doucette loamy fine sand, on smooth 2 percent slope in cutover forest.
(Colors are for moist soils unless otherwise indicated.)
A1--0 to 5 inches; dark grayish brown (10YR 4/2) loamy fine sand; single grained; soft, very friable, nonsticky and nonplastic; many fine and medium roots; medium acid; clear smooth boundary. (2 to 6 inches thick)
A2--5 to 12 inches; brown (10YR 5/3) loamy fine sand; single grained; soft, very friable, nonsticky and nonplastic; many fine and medium roots; medium acid; gradual smooth boundary. (0 to 8 inches thick)
E--12 to 24 inches; light yellowish brown (10YR 6/4) loamy fine sand; few medium yellowish brown (10YR 5/4) stains; single grained; soft, very friable, nonsticky and nonplastic; few fine and medium roots; strongly acid; clear smooth boundary. (10 to 30 inches thick)
Bt--24 to 38 inches; strong brown (7.5YR 5/6) sandy clay loam; few medium faint brownish yellow (10YR 6/6) and few medium prominent red (2.5YR 4/6) mottles; weak medium subangular blocky structure; slightly hard, friable; slightly sticky and sligthly plastic; few medium and coarse roots; few patchy clay films on faces of peds; about 2 percent plinthite by volume in lower part; very strongly acid; gradual smooth boundary. (3 to 21 inches thick)
Btv1--38 to 54 inches; strong brown (7.5YR 5/6) sandy clay loam; few medium faint brownish yellow (10YR 6/6) and many medium prominent red (2.5YR 4/6) mottles; moderate medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few medium roots; few patchy clay fims on faces of peds; about 5 percent plinthite by volume; very strongly acid; gradual smooth boundary. (9 to 26 inches thick)
Btv2--54 to 68 inches; brownish yellow (10YR 6/6) sandy clay loam; few medium distinct light brownish gray (10YR 6/2), pale brown
(10YR 6/3), and few medium prominent red (2.5YR 4/6) mottles; weak medium subangular blocky structure; hard, firm, sticky and plastic, about 10 percent plinthite by volume; few patchy clay films on faces of peds; very strongly acid; gradual smooth boundary.
(6 to 20 inches thick)
Bt'--68 to 80 inches; mottled reddish yellow (7.5YR 6/6) and brownish yellow (10YR 6/6) sandy clay loam; common medium distinct yellowish red (5YR 5/6) mottles; weak medium subangular blocky structure; hard, firm, sticky and plastic; very strongly acid.
TYPE LOCATION: Newton County, Texas; from the intersection of U.S. Highway 190 and Texas Highway 87 in Newton, 4.1 miles northeast along Texas Highway 87, 1.2 miles east on Farm Road 1414, 800 feet southeast along forest road to gate, 1.3 miles south along forest road, 800 feet east along forest trail; 200 feet north in forest.
RANGE IN CHARACTERISTICS: Solum thickness is greater than 60 inches. Depth to a horizon containing 5 to 20 percent plinthite ranges from 30 to 60 inches. Base saturation at 50 inches below the top of the Bt horizon ranges from 5 to 25 percent.
The A horizon has hue of 10YR, value 4 through 6, chroma 2 through 4. The E horizon has hue of 10YR, value of 5 and 6, chroma of 3 and 4. Thickness of the combined A and E horizons ranges from 20 to 40 inches. Texture is loamy fine sand or fine sand. Reaction is medium acid to strongly acid.
The Bt horizon has hue of 5YR, 7.5YR, or 10YR, value of 5 or 6, chroma of 4 to 8. Mottles in shades of red, yellow, and gray are in the lower part of most pedons. Texture is sandy clay loam. Plinthite ranges from 5 to 20 percent in the Bty horizon and from 0 to 5 percent in the Bt and Bt' horizons. Reaction is strongly acid or very strongly acid.
COMPETING SERIES: These are the Fuquay, Lilbert, Pocalla, and Stilson series in the same family; and the Bonneau, Bowie, Boykin, Briley, Darco, Depcor, Gunter, Larue, Leefield, Letney, Lucy, Pinetucky, Rentzel, Rosalie, Shankler, Troup, Trep, and Wagram series. Fuquay and Stilson soils have upper Bt horizons with mottles of red and gray, contain less silt and more medium and coarse sand and have low activity clay in the argillic horizon. Lilbert soils are developed in older sediments and are assumed to have different chemical and/or mineralogical properties. Pocalla soils have bisequal profiles. Bowie and Pinetucky soils have thinner surface layers that contain less sand. Bonneau, Boykin, Briley, Letney, Lucy, Rosalie, Trep, and Wagram soils contain less than 5 percent plinthite. Darco, Gunter, Shankler, and Troup soils have sandy surface layers more than 40 inches thick. Depcor and Larue soils have a base saturation of more than 35 percent. Leefield and Rentzel soils contain mottles with chromas of 2 or less in the upper Bt horizon.
GEOGRAPHIC SETTING: Doucette soils are on gently sloping to sloping uplands of the West Coastal Plain. Slopes range from 1 to 8 percent. The soils formed in sandy and loamy sediments of Pleistocene Age, mainly of the Willis formation. Mean annual precipitation ranges from 46 to 58 inches. Summer rainfall ranges from 30 to 40 inches. Summer moisture deficit ranges from 0 to 4 inches. Mean annual temperature ranges from 66 degrees to 70 degrees F., and the Thornthwaite annual P-E indices exceed 72.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Pinetucky and Boykin series, and the Bonwier, Shankler, Urland, and Newco series. Pinetucky and Shankler soils are on similar positions. Boykin, Bonwier, Urland, and Newco soils are on higher positions on the landscape. Bonwier, Urland, and Newco soils have clayey Bt horizons.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is slow and permeability is moderate. The soils have a perched water table for a few days following heavy rains.
USE AND VEGETATION: Used mainly for forest, but some areas have been cleared and are being used for pasture. Forest vegetation consists mainly of loblolly, shortleaf, and longleaf pines, red oak, and sweetgum trees with an understory of grasses and shrubs.
DISTRIBUTION AND EXTENT: West Coastal Plains of Eastern Texas and Western Louisiana. The series is extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Newton County, Texas; 1980
REMARKS: These soils have been included in the Lilbert and Fuquay series.
Diagnostic horizons and features in this pedon are:
Arenic epipedon - 0 to 24 inches
Argillic horizon - 24 to 80 inches
Plinthite comprises 5 percent or more of the 38 to 68 inch layers
ADDITIONAL DATA: Hach kit data at type location.
72 depth - B. S. 8 percent; CEC - 13 m. e.; exchangeable A1 - 5 m.e.