LOCATION PINETUCKY TX+LAEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, thermic Plinthic Paleudults
TYPICAL PEDON: Pinetucky fine sandy loam, on 8 percent slope, in forest.
(Colors are for moist soil unless otherwise stated.)
A--0 to 8 inches; grayish brown (10YR 5/2) fine sandy loam; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine, few medium roots; very strongly acid; clear smooth boundary. (4 to 13 inches thick)
E--8 to 13 inches; yellowish brown (10YR 5/6) fine sandy loam; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and few medium roots; very strongly acid; clear smooth boundary. (4 to 13 inches thick)
Bt1--13 to 27 inches; strong brown (7.5YR 5/6) sandy clay loam, few medium faint strong brown (7.5YR 5/8) mottles; moderate medium subangular blocky structure; slightly hard, friable, sticky and plastic; patchy clay films on faces of peds; few fine and medium roots; few fine pores, very strongly acid; clear wavy boundary. (5 to 26 inches thick)
Bt2--27 to 48 inches; yellowish brown (10YR 5/8) sandy clay loam; moderate medium subangular blocky structure; hard, firm, sticky and plastic; few fine pores; patchy clay films on faces of peds; very strongly acid; gradual wavy boundary. (8 to 28 inches thick)
Btv1--48 to 65 inches; yellowish brown (10YR 5/8) sandy clay loam; many medium and coarse prominent red (2.5YR 4/6), yellowish red (5YR 4/8) and many fine and medium distinct light gray (10YR 7/2) mottles; moderate medium subangular blocky structure; hard, firm, sticky and plastic, few fine pores; few thin patches of clay films on faces of peds; plinthite comprises about 10 percent by volume of the horizon; very strongly acid; clear smooth boundary. (2 to 27 inches thick)
Btv2--65 to 80 inches; brownish yellow (10YR 6/6) sandy clay loam; many medium and coarse prominent red (2.5YR 4/8), yellowish red (5YR 4/8) and common fine and medium distinct light gray (10YR 7/2) mottles; weak medium subangular blocky structure; hard, firm, sticky and plastic; few apparent clay films; plinthite comprises about 2 percent by volume of the horizon; very strongly acid.
TYPE LOCATION: Newton County, Texas; from the intersection of U. S. Highway 190 and Texas Highway 87, 4.1 miles northeast along Texas Highway 87, 1.2 miles east of Farm Road 1414, 800 feet southeast along forest road to gate, 100 feet south and 50 feet west in forest.
RANGE IN CHARACTERISTICS: Solum thickness is greater than 60 inches. Depth to horizon that contains more than 5 percent plinthite is 25 to 60 inches. Strongly cemented to indurated iron oxide concretions less than 2 cm in diameter range from 0 to 10 percent in the A horizons and 0 to 5 percent in the Bt horizon. CEC ranges from 8 to 15 meq per 10 gm of soil.
The A horizon has hue of 10YR, value of 4 or 5, and chroma of 2 or 3. The E horizon has a hue of 10YR, value of 5 or 6, and chroma of 3 to 6. The horizons are fine sandy loam, sandy loam, or loamy fine sand. Reaction is medium acid to very strongly acid.
The Bt horizons have hue of 10YR or 7.5YR, value of 5 or 6, and chroma from 4 through 8. Mottles range from none to many, with hues of 10R to 10YR, value of 4 to 7, and chroma from 3 to 8. The Btv horizons have the same colors as the upper Bt horizons, and in addition, contain few to many mottles with value of 6 or 7, and chroma from 1 to 3. The Btv horizon contains 5 to 20 percent plinthite in some part. The texture of the Bt and Btv horizons is sandy clay loam or clay loam throughout, with a clay content ranging from 20 to 35 percent. Reaction is strongly acid to very strongly acid.
COMPETING SERIES: These are the Baxterville, Bowie, Dothan, Malbis, Notcher, Otanya, Rogan, and Tifton series in the same family and the Boykin and Sunsweet series. Baxterville soils have Bt horizons that are 5YR and redder. Bowie soils are on Eocene age landscapes of the upper coastal plains. Boykin soils have loamy fine sand surface layers 20 to 40 inches thick. Dothan and Tifton soils have less than 20 percent silt in the control section. Malbis and Otanya soils have perched water tables at shallower depths. Notcher and Rogan soils have more than 15 percent ironstone pebbles. Sunsweet soils have more than 35 percent clay in their control sections.
GEOGRAPHIC SETTING: Pinetucky soils are on gently sloping to sloping uplands of the West Coastal Plains. Slopes range from 1 to 8 percent. The soils formed in loamy sediments of Pleistocene age, mainly from 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 65 to 70 degrees F., and the Thornthwaite annual P-E index exceeds 72.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Boykin and Rogan series and the Bonwier, Conroe, Doucette, Newco, Stringtown, and Urland soils. Bonwier, Urland, and Newco soils occur on ridgetops and low hills in the landscape; they all have clayey control sections. Boykin soils are on slightly higher areas. Conroe and Doucette soils are on similar positions and have thicker loamy fine sand surface layers. Rogan soils occur on gently sloping areas. Stringtown soils occur on steep side slopes and have a clay content in the Bt horizon that decreases within 60 inches of the surface.
DRAINAGE AND PERMEABILITY: Pinetucky soils are moderately well drained. Runoff is slow to medium and permeability is moderately slow.
USE AND VEGETATION: Used mainly for forest and pasture. Forest consists mainly of loblolly, shortleaf, and longleaf pines, sweetgum, and red oak trees with an understory of grasses and shrubs. Pastures are mainly bermudagrass and bahiagrass.
DISTRIBUTION AND EXTENT: West Coastal Plains of southeast Texas and southwest Louisiana. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Newton County, Texas; 1980.
REMARKS: These soils were previously included in the Bowie series.