LOCATION COXVILLE NC+AL FL GA SC VAEstablished Series
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 9 inches; dark gray (10YR 4/1) fine sandy loam; weak fine granular structure; very friable; common fine roots; slightly acid; clear wavy boundary. (5 to 12 inches thick)
Eg--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 8 inches thick)
BEg--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 6 inches thick)
Btg1--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--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--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--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 40 to more than 80 inches)
Cg--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.
RANGE IN CHARACTERISTICS:
Depth to Bedrock: Greater than 80 inches
Depth to Seasonal High Water Table: 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 (where present):
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 (where present):
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 (where present):
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:
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 PERMEABILITY:
Drainage Class (Agricultural): Poorly drained
Internal Free Water Occurrence: Very shallow to shallow, common to persistent
Flooding Frequency and Duration: None
Ponding Frequency and Duration: None
Permeability: Moderately slow
USE AND VEGETATION:
Major Uses: Forest, some pasture and cropland
Dominant Vegetation: Where cultivated--corn, soybeans, and truck crops. Where wooded--loblolly and longleaf pine, sweetgum, blackgum, water oak, willow oak, water tupelo, elm, and hickory.
DISTRIBUTION AND EXTENT:
Distribution: Coastal Plain of North Carolina, Georgia, Florida, Alabama, Mississippi, and possibly Virginia and Louisiana
Extent: Large
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina.
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 have not been consistently correlated with less than 45 percent clay (or 30 percent silt) in the particle-size control section..
Diagnostic horizons and features recognized in the typical pedon are:
Ochric epipedon--the zone from the surface to a depth of 11 inches (Ap and Eg horizons)
Albic horizon--the zone from 9 to 11 inches (Eg horizon)
Argillic horizon--the zone between depths of 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 25-450SOI-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