LOCATION NIXONTON NCEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, thermic Typic Hapludults
TYPICAL PEDON: Nixonton loam - cultivated. (Colors are for moist soil)
Ap--0 to 6 inches; brown (10YR 4/3) loam; moderate fine granular structure; very friable; nonsticky and nonplastic; few very fine roots; few fine flakes of mica; moderately acid; clear smooth boundary. (5 to 10 inches thick)
A/Bt--6 to 9 inches; 60 percent brown (10YR 4/3) loam and 40 percent dark yellowish brown (10YR 4/6) loam; A material is weak fine subangular blocky structure, and Bt material is weak medium subangular blocky structure; friable; slightly sticky and slightly plastic; few very fine roots; few fine flakes of mica; slightly acid; clear smooth boundary. (0 to 6 inches thick)
Bt1--9 to 18 inches; dark yellowish brown (10YR 4/6) clay loam; moderate medium subangular blocky structure; friable; moderately sticky and moderately plastic; few very fine roots; few fine flakes of mica; moderately acid; clear smooth boundary.
Bt2--18 to 24 inches; yellowish brown (10YR 5/6) loam; weak medium subangular blocky structure; friable; friable; slightly sticky and moderately plastic; few very fine roots; few fine flakes of mica; moderately acid; gradual smooth boundary. (The combined thickness of the Bt horizon is 12 to 30 inches)
BC--24 to 35 inches; light olive brown (2.5Y 5/6) loam; weak medium subangular blocky structure; friable; nonsticky and nonplastic; few fine flakes of mica; slightly acid; gradual smooth boundary. (5 to 16 inches thick)
CB--35 to 45 inches; light yellowish brown (2.5Y 6/4) loam; weak fine subangular blocky structure; friable; nonsticky and nonplastic; few fine flakes of mica; common medium and coarse light yellowish brown (2.5Y 6/3) irregularly shaped iron depletions and common fine dark yellowish brown (10YR 4/6) irregularly shaped masses of iron accumulation distributed uniformly throughout the horizon; slightly acid; clear wavy boundary. (0 to 12 inches thick)
C1--45 to 50 inches; light olive brown (2.5Y 5/4) loam; massive; friable; nonsticky and nonplastic; few fine flakes of mica; common fine, medium and coarse light gray (2.5Y 7/1) irregularly shaped iron depletions and common fine dark yellowish brown (10YR 4/6) soft masses of iron accumulation distributed uniformly throughout the horizon; evidence of marine stratification; slightly acid; gradual smooth boundary.
C2--50 to 60 inches; 40 percent light yellowish brown (2.5Y 6/4), 30 percent light olive gray (5Y 6/2) and 40 percent yellowish brown (10YR 5/6) sandy loam; massive; friable; nonsticky and nonplastic; few fine flakes of mica; common fine and medium yellowish brown (10YR 5/8) soft masses of iron accumulation; evidence of marine stratification; discontinuous strata are gray (5Y 6/1) with common medium and coarse strong brown (7.5YR 5/6) and light yellowish brown (2.5Y 6/4) masses of iron accumulation; slightly acid.
TYPE LOCATION: Pasquotank County, North Carolina from Elizabeth City, 5.2 miles south on NC 34, 1 mile east on SR1126, 0.4 miles south on farm road, 75 feet east of farm road in cultivated field. USGS Weeksville topographic quadrangle, lat. 36 degrees 13 minutes 28 seconds N. and long. 76 degrees 08 minutes 36 seconds W.
RANGE IN CHARACTERISTICS:
Solum Thickness: 30 to 60 inches
Depth to Bedrock: Greater than 60 inches
Depth to Seasonal High Water Table: 48 to 72 inches, December to March
Soil Reaction: Strongly acid through slightly acid in all horizons unless limed
Other Features: Mica, feldspars and other weatherable minerals are few to common in the lower B and C horizons
A or Ap horizon
Color--hue of 7.5YR to 2.5Y, value of 4 to 6, and chroma of 1 to 4
Texture--silt loam, very fine sandy loam, or loam
E horizon (if it occurs)
Color--hue of 10YR or 2.5Y, value of 6 or 7, and chroma of 2 to 4
Texture--silt loam, very fine sandy loam, or loam
AB or A/B horizon (if it occurs)
Color--hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 3 to 8
Texture--silt loam, very fine sandy loam, or loam
Bt horizon:
Color--hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 3 to 8
Texture--silty clay loam, clay loam or loam.
CB or BC horizon (if it occurs)
Color--hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 3 to 8
Texture--clay loam, silty clay loam, loam, silt loam, or fine sand loam
C or Cg horizon:
Color--hue of 10YR to 5Y, value of 4 to 7, and chroma of 1 to 8
Texture--silt loam, loam, fine sandy loam, sandy loam, loamy fine sand, loamy sand, sand, or fine sand
Redoximorphic features--iron masses in shades of brown, red or yellow and iron depletions in shades of brown, olive and gray
COMPETING SERIES:
Brandon soils--formed in loess that is 20 to 40 inches thick over very gravelly or gravelly water deposited materials
Choccolocco soils--on flood plains and formed in stratified fluvial sediments derived from weathered
Talladega slate
Hallison soils--have a paralithic contact with soft, weathered Triassic
siltstones, mudstones, and sandstones at 40 to 60 inches
GEOGRAPHIC SETTING:
Landscape: Coastal Plain
Landform: Terraces
Elevation: 5 to 25 feet above mean sea level
Parent Material: Loamy and silty marine sediments
Mean Annual Air Temperature: 59 to 63 degrees
Mean Annual Precipitation: 46 to 52 inches
Frost Free Period: 185 to 240 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Barclay soils--somewhat poorly drained soils (seasonal high water table 0 to 12 inches) on slightly lower landscapes
Bertie soils--somewhat poorly drained soils (seasonal high water table 12 to 18 inches) on slightly lower landscapes
Dragston soils--somewhat poorly drained soils (seasonal high water table 0 to 12 inches) family on slightly lower landscapes
Munden soils--moderately well drained soils (seasonal high water table 18 to 30 inches) on higher landscapes
Pasquotank soils--poorly drained soils (seasonal high water table 0 to 12 inches) on flats and in depressions
Weeksville soils--very poorly drained soils (seasonal high water table 0 to 12 inches foot) on flats and in depressions
DRAINAGE AND PERMEABILITY:
Agricultural Drainage Class: Well drained
Permeability: Moderately
USE AND VEGETATION:
Major Uses: Mostly cultivated
Dominant Vegetation: Where cultivated--corn, soybeans, small grain, potatoes, cabbage, beans, and other truck crops. Where wooded--loblolly pine, sweetgum, blackgum, red maple, white oak, southern red oak, American holly, and dogwood.
DISTRIBUTION AND EXTENT:
Distribution: Tidewater area (MLRA 153B) of North Carolina and possibly Virginia
Extent: Small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Pasquotank County, North Carolina; 1951.
REMARKS: The Nixonton soils were formerly classified in the Gray-Brown Podzolic great soil group. In Soil Taxonomy, the placement was coarse-loamy family of Typic Dystrochrepts. This revision changes the series to a fine-silty family of Typic Hapludults. The 2008 edits were to correct the water table depth in RIC and add latitude and longitude.(DTA)
ADDITIONAL DATA:
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation NC0001 NIXONTON 0-3 59-63 185-240 46-52 5-25SOI-5 FloodL FloodH Watertable Kind Months Bedrock NC0001 NONE 4.0-6.0 APPARENT DEC-MAR >60
SOI-5 Depth Texture 3-Inch No-10 Clay% CEC NC0001 0-23 VFSL L SIL 0-0 98-100 5-18 3-20 NC0001 23-61 L SICL CL 0-0 100-100 18-35 4-8 NC0001 61-127 SIL L SL 0-0 100-100 8-25 2-6 NC0001 127-152 LFS LS FS 0-0 98-100 3-12 1-10
SOI-5 Depth pH O.M. Permeab Shnk-Swll NC0001 0-23 5.1-6.5 .5-2. 0.6-2.0 LOW NC0001 23-61 4.5-6.0 0.-1. 0.2-0.6 LOW NC0001 61-127 4.5-6.0 0.-.5 0.2-0.6 LOW NC0001 127-152 5.1-6.5 0.-.5 2.0-6.0 LOW