LOCATION COXVILLE NC+GA SC VA
Established Series
CMO/Rev. JAK; DTA
11/2025
COXVILLE SERIES
MLRA(s): 133A, 153A
Soil Survey Regional Office (SSRO) Responsible: Southeast
Depth Class: Very deep
Agricultural Drainage Class: Poorly drained
Internal Free Water Occurrence: Very shallow to shallow, common to persistent
Flooding Frequency and Duration: None
Ponding Frequency and Duration: None
Index Surface Runoff: Negligible
Saturated Hydraulic Conductivity Class: Moderately high
Landscape: Lower to upper coastal plain
Landform: Flats, Carolina bays, and depressions
Geomorphic Component: Talfs, dips
Parent Material: Marine deposits or fluviomarine sediments
Slope: 0 to 2 percent
Mean Annual Air Temperature (type location): 17 degrees C (62 degrees F)
Mean Annual Precipitation (type location): 1219 millimeters (48 inches)
Frost Free Period (type location): 245 days
TAXONOMIC CLASS: Fine, kaolinitic, thermic Typic Paleaquults
TYPICAL PEDON: Coxville fine sandy loam--cultivated. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 23 centimeters (0 to 9 inches); dark gray (10YR 4/1) fine sandy loam; weak fine granular structure; very friable; common fine roots; slightly acid; clear wavy boundary. (13 to 30 centimeters (5 to 12 inches) thick)
Eg--23 to 28 centimeters (9 to 11 inches); gray (10YR 6/1) fine sandy loam; weak fine granular structure; very friable; common fine roots; strongly acid; clear wavy boundary. (0 to 20 centimeters (0 to 8 inches) thick)
BEg--28 to 33 centimeters (11 to 13 inches); grayish brown (10YR 5/2) sandy clay loam; weak medium subangular blocky structure; friable, slightly sticky, plastic; few fine roots; few fine distinct brownish yellow (10YR 6/8) masses of oxidized iron; very strongly acid; clear wavy boundary. (0 to 15 centimeters (0 to 6 inches) thick)
Btg1--33 to 63 centimeters (13 to 25 inches); gray (10YR 5/1) sandy clay; moderate medium subangular blocky structure; firm, sticky, plastic; common faint clay films on vertical faces of peds and in root channels; few fine roots; few root channels; few medium prominent yellowish brown (10YR 5/6) masses of oxidized iron; very strongly acid; gradual wavy boundary.
Btg2--63 to 102 centimeters (25 to 40 inches); gray (10YR 5/1) sandy clay; weak medium subangular blocky structure; firm, sticky, plastic; few faint clay films on faces of peds; common medium prominent brownish yellow (10YR 6/6) and red (2.5YR 4/6) masses of oxidized iron; very strongly acid; gradual wavy boundary.
Btg3--102 to 132 centimeters (40 to 52 inches); gray (10YR 6/1) sandy clay; weak subangular blocky structure; firm, sticky, plastic; few faint clay films on vertical faces of peds; few medium prominent red (2.5YR 4/6) and reddish yellow (7.5YR 6/6) masses of oxidized iron; very strongly acid; gradual wavy boundary.
Btg4--132 to 183 centimeters (52 to 72 inches); gray (10YR 6/1) sandy clay; weak medium subangular blocky structure; firm, sticky, plastic; pockets and lenses of clayey and sandy materials; common medium prominent reddish yellow (7.5YR 6/6) masses of oxidized iron; very strongly acid; gradual clear boundary. (combined thickness of the Btg horizon is 102 to more than 203 centimeters (40 to more than 80 inches)
Cg--183 to 203 centimeters (72 to 80 inches); stratified sand, silt, and clay; very strongly acid.
TYPE LOCATION: Pitt County, North Carolina; 1 mile south of Greenville on NC Highway 43, 300 feet east from road. USGS Greenville SE, North Carolina topographic quadrangle
Latitude--35.5750
Longitude-- -77.3534
Datum--WGS84
RANGE IN CHARACTERISTICS:
Solum thickness: 152 to 203 centimeters (60 to 80 inches) or more
Depth to Bedrock: Greater than 203 centimeters (80 inches)
Depth to Seasonal High Water Table: 0 to 30 centimeters (0 to 12 inches), November to April
Rock Fragment content: 0 to 15 percent, by volume, throughout, but less than 5 percent in most pedons
Soil Reaction: Extremely acid to strongly acid, except where limed
RANGE OF INDIVIDUAL HORIZONS:
Ap horizon or A horizon:
Color--hue of 10YR to 5Y, value of 2 to 5, chroma of 1 or 2, or neutral with value of 2 to 5
Texture (fine-earth fraction)--fine sandy loam, sandy loam, loam, or rarely sandy clay loam
Eg horizon (if it occurs):
Color--hue of 10YR to 5Y, value of 5 to 7, chroma of 1 or 2, or neutral with value of 5 to 7
Texture (fine-earth fraction)--fine sandy loam, sandy loam, or loam
Redoximorphic features (where present)--masses of oxidized iron in shades of red, yellow, or brown and iron depletions in shades of gray
BEg or BAg horizon (if it occurs):
Color--hue of 10YR to 5Y, value of 4 to 6, chroma of 1 or 2, or neutral with value of 4 to 6
Texture (fine-earth fraction)--sandy clay loam, loam, or clay loam
Redoximorphic features (where present)--masses of oxidized iron in shades of red, yellow, or brown and iron depletions in shades of gray
Btg horizon:
Color--hue of 10YR to 5Y, value of 4 to 7, chroma of 1 or 2, or neutral with value of 4 to 7
Texture (fine-earth fraction)-- sandy clay, clay loam, or clay
Redoximorphic features (where present)--masses of oxidized iron in shades of red, yellow, or brown and iron depletions in shades of gray
BCg or Cg horizons (where present):
Color--hue of 10YR to 5Y, value of 4 to 7, chroma of 1 or 2, or neutral with value of 4 to 7
Texture (fine-earth fraction)--stratified sandy, loamy, silty, or clayey sediments
Redoximorphic features (where present)--masses of oxidized iron in shades of red, yellow, or brown and iron depletions in shades of gray
COMPETING SERIES:
Grady soils--Conceptually, Grady soils have a weighted average of 45 to 65 percent clay in the particle-size control section and Coxville soils have 35 to 45 percent.
GEOGRAPHIC SETTING:
Landscape: Lower to upper coastal plain
Landform: Flats, Carolina bays, and depressions
Geomorphic Component: Talfs, dips
Parent Material: Marine deposits or fluviomarine sediments
Elevation: 25 to 450 feet
Mean Annual Air Temperature: 57 to 70 degrees
Mean Annual Precipitation: 38 to 52 inches
Frost Free Period: 190 to 245 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bethera soils--have mixed mineralogy
Byars soils--have an umbric epipedon
Dunbar soils--are better drained
Duplin soils--are better drained
Grady soils--have more clay in the particle-size control section
Goldsboro soils--are better drained and fine-loamy
Lynchburg soils--are better drained and fine-loamy
Marlboro soils--are better drained
Norfolk soils--are better drained and fine-loamy
Pantego soils--have an umbric epipedon and are fine-loamy
Rains soils--are fine-loamy
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Agricultural Drainage Class: Poorly drained
Index Surface Runoff: Low to negligible
Saturated Hydraulic Conductivity Class: Moderately high
USE AND VEGETATION:
Major uses: Woodland and where drained, some cropland
Dominant Vegetation: Where wooded--loblolly and longleaf pine, sweetgum, blackgum, water oak, willow oak, water tupelo, elm, and hickory.
Where cultivated--corn, soybeans, and truck crops.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Auburn, Alabama
DISTRIBUTION AND EXTENT:
Distribution: North Carolina, Georgia, South Carolina, Alabama, and Virginia
Extent: Extensive
SERIES ESTABLISHED: Pitt County, North Carolina; 1909.
REMARKS: There appears to be no significant difference in soil characteristics or properties of the Grady and Coxville soils that warrants separation at the series level. Each series was proposed before 1910 by the respective states (Georgia and North Carolina) and they have been maintained since. They were separated on clay and silt content in the 1960s. However, Coxville soils have not been consistently correlated with less than 45 percent clay (or 30 percent silt) in the particle-size control section. The November 2025 revision updated the format.
Diagnostic horizons and features recognized in the typical pedon are:
Ochric epipedon--the zone from 0 to 28 centimeters (0 to 11 inches) (Ap and Eg horizons)
Albic horizon--the zone from 23 to 28 centimeters (9 to 11 inches) (Eg horizon)
Argillic horizon--the zone between depths of 28 and 183 centimeters (11 and 72 inches) (BEg, Btg1, Btg2, Btg3, and Btg4 horizons)
ADDITIONAL DATA:
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation
NC0045 COXVILLE 0-2 57-70 190-245 38-52 25-450
SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness
NC0045 NONE 0-1.0 APPARENT NOV-APR >80
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC-
NC0045 0-11 FSL SL L 0-0 100-100 5-27 2-7
NC0045 11-72 CL SC C 0-0 100-100 35-60 4-7
NC0045 72-80 VAR - - - -
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll
NC0045 0-11 3.5-5.5 2.0-4.0 0-0 0.6-2.0 LOW
NC0045 11-72 3.5-5.5 0.0-1.0 0-0 0.2-0.6 MODERATE
NC0045 72-80 3.5-5.5 0.0-0.05 0-0 0.2-6.0 Low
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National Cooperative Soil Survey
U.S.A.