LOCATION DUPLIN NC+FL GA SC VAEstablished Series
TAXONOMIC CLASS: Fine, kaolinitic, thermic Aquic Paleudults
TYPICAL PEDON: Duplin sandy loam--cultivated. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; grayish brown (10YR 5/2) sandy loam; weak granular structure; friable; many fine roots; many medium pores; neutral; clear smooth boundary. (6 to 12 inches thick)
Bt1--8 to 18 inches, yellowish brown (10YR 5/4) sandy clay; common medium faint brownish yellow (10YR 6/6) mottles; weak medium subangular blocky structure; firm, sticky and plastic; common fine roots; common medium pores; few faint clay films on faces of peds; very strongly acid; gradual wavy boundary. (6 to 14 inches thick)
Bt2--18 to 27 inches, yellowish brown (10YR 5/4) sandy clay; common coarse distinct light brownish gray (10YR 6/2) and few medium distinct brownish yellow (10YR 6/6) mottles; moderate medium subangular blocky structure; firm, sticky and plastic; few fine roots; common medium pores; few faint clay films on faces of peds; very strongly acid; gradual wavy boundary. (7 to 14 inches thick)
Bt3--27 to 54 inches yellowish brown (10YR 5/4) sandy clay; many coarse distinct light brownish gray (10YR 6/2) and few fine prominent red mottles; moderate medium subangular blocky structure; firm, sticky and plastic; few fine roots and pores; few faint clay films on faces of peds; very strongly acid; gradual wavy boundary. (20 to 35 inches thick)
Bt4--54 to 84 inches, yellowish brown (10YR 5/4) sandy clay loam; many coarse distinct light brownish gray (10YR 6/2) and common medium faint brownish yellow (10YR 6/6) mottles; weak medium subangular blocky structure; friable, slightly sticky, slightly plastic; common medium pores; few distinct clay films; grayish areas are clean sand grains; very strongly acid; gradual wavy boundary. (14 to 34 inches thick)
Cg--84 to 100 inches, light gray (10YR 7/1) sandy clay loam; many medium distinct very pale brown (10YR 7/4) and yellowish red (5YR 5/6) mottles; massive; friable; slightly sticky; very strongly acid.
TYPE LOCATION: Robeson County, North Carolina; three miles east of Maxton on county road 1303; 1/3 mile north on dirt road; 1/4 mile east on field road; 100 feet southeast in field.
RANGE IN CHARACTERISTICS: Solum thickness is more than 60 inches. The soil is strongly acid or very strongly acid, except where limed.
The A or Ap horizon has hue of 10YR or 2.5Y or it is neutral, value of 4 to 6, and chroma of 0 to 3. Where these horizons are less than 10 inches thick color values can range to 2 or 3. Texture is sandy loam, fine sandy loam, very fine sandy loam, loam, or loamy sand.
The E horizon, where present, has hue of 10YR or 2.5Y, value of 4 to 7, and chroma of 2 to 4. Texture range is the same as A or Ap horizon.
The BE horizon, where present, has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 4 to 8. It is loam or sandy clay loam.
The Bt horizon has hue of 7.5YR to 2.5Y, value of 4 to 7, and chroma of 3 to 8. The lower Bt horizon is mottled or are gray with high mottles. Gray mottles with chroma of 2 or less are within 30 inches of the soil surface. It is sandy clay, clay, clay loam, or sandy clay loam. Weighted clay average is 35 to 55 percent in control section. Silt content is less than 30 percent.
The BC horizon, where present, is similar in color to the lower Bt horizon. Texture is sandy clay loam, clay loam, or sandy clay.
The C horizon has hue of 7.5YR to 2.5Y, value of 4 to 7, and chroma of 1 to 6. It is sandy clay loam, sandy loam, sandy clay, or clay. In some pedons the lower Bt horizon has a few strong brown to red nodules of plinthite.
COMPETING SERIES: The Persanti series is the only series in the same family. Persanti soils have strongly developed structure in some parts of the Bt horizon and contains significant amounts of vermiculite. Ackwater, Angie, Craven, Dogue, Dunbar, Exum, Foreston, Goldston, Lenoir, Marlboro, Nahunta, Wahee, and Wrightsboro series are similar soils in other families. Ackwater, Angie, Craven, Dogue, Lenoir, and Wahee, soils have mixed mineralogy. Also the Dunbar, Lenoir, Nahunta, and Wahee soils have mottles with chroma of 2 or less in the upper Bt horizon and have lower Bt horizons dominated by chroma of 2 or less. Marlboro soils lack chroma 2 or less mottles within 30 inches of the soil surface. Exum soils have fine-silty particle size class. Foreston is coarse-loamy and Goldsboro, Wrightsboro soils are fine-loamy. Wrightsboro soils also have a clayey Bt horizon.
GEOGRAPHIC SETTING: Duplin soils are on broad nearly level to gently sloping surfaces mainly in the middle and upper Coastal Plain. Slopes range from 0 to 7 percent. The soil formed in unconsolidated clayey sediments. Near the type location, mean annual air temperature is 63 degrees F. Mean annual rainfall is about 46 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: In addition to the competing Dunbar, Exum, Foreston, Goldsboro, Lenoir, Marlboro, Nahunta, Persanti, Wahee, and Wrightsboro series these include the Aycock, Bayboro, Coxville, Dothan, Faceville, Grady, Lynchburg, McColl, Norfolk, Orangeburg, Rains, and Varina series. Aycock, Dothan, Norfolk, and Orangeburg soils have B2t horizons with less than 35 percent clay. Bayboro, Coxville, Grady, Lynchburg, McColl, and Rains soils are wetter and have dominant chroma of 2 or less in the Bt horizons. Faceville soils have Bt horizons in hues of 5 YR or redder. Varina soils are well drained and have more than 5 percent plinthite within 60 inches of the surface.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow runoff; moderately slow permeability.
USE AND VEGETATION: Approximately two-thirds of the total acreage is in cultivation with the remainder in pasture and forest. Common crops grown are corn, cotton, soybeans, tobacco, peanuts, truck crops, and small grain. Original forests consisted of pine and mixed hardwood. Loblolly pine, longleaf pine, white oak, southern red oak, sweetgum, blackgum, yellow-poplar, flowering dogwood, and American holly are dominant species.
DISTRIBUTION AND EXTENT: Coastal Plain areas of Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, and Virginia. This series is of large extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Duplin County, North Carolina; 1949.
REMARKS: None
ADDITIONAL DATA:
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation NC0047 DUPLIN 0-7 59-66 190-240 38-50 25-450SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness NC0047 NONE 2.0-3.0 APPARENT DEC-APR >80 -
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- NC0047 0-8 SL FSL 0-0 100-100 4-18 1-4 NC0047 0-8 LS 0-0 90-100 10-15 1-4 NC0047 8-80 SC CL C 0-0 98-100 35-60 4-7
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll NC0047 0-8 5.1-7.3 0.5-2.0 0-0 2.0-6.0 LOW NC0047 0-8 4.5-5.5 0.5-2.0 0-0 2.0-6.0 LOW NC0047 8-80 4.5-5.5 0.0-0.5 0-0 0.2-0.6 MODERATE