LOCATION JOHNSTON NC+AL FL GA MS SC VAEstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, active, acid, thermic Cumulic Humaquepts
TYPICAL PEDON: Johnston mucky loam--forested. (Colors are for moist soil unless otherwise stated.)
A--0 to 30 inches; black (10YR 2/1) mucky loam; massive; friable; very strongly acid; abrupt smooth boundary. (24 to 48 inches thick)
Cg1--30 to 34 inches; dark gray (10YR 4/1) loamy fine sand; single grained; loose; very strongly acid; abrupt smooth boundary.
Cg2--34 to 60 inches; gray (10YR 5/1) fine sandy loam; lenses and pockets of loamy sand and sand; massive; very friable; dark colored loam in old root channels; very strongly acid.
TYPE LOCATION: Scotland County, North Carolina; 3 miles south of Wagram; 50 feet west of Shoe Heel Creek; 1.5 miles north of Lee's pond; 25 feet south of a paved road.
RANGE IN CHARACTERISTICS:
Depth to Bedrock: Greater than 80 inches
Depth to Seasonal High Water Table: 0 to 12 inches, November to May
Rock fragment content: Below 40 inches, 0 to 35 percent, by volume, mostly rounded quartz gravel
Soil Reaction: Extremely acid to strongly acid
Other Features: Some pedons have a few inches of recent alluvium deposited over the dark colored A horizon or thin (less than 8 inches thick) organic layers.
RANGE OF INDIVIDUAL HORIZONS:
Oa horizon (where present):
Color--hue of 10YR, value of 2 or 3, chroma of 1 or 2, hue of 2.5Y, value of 2.5 or 3, chroma of 1 or 2, or is neutral with value of 2.5 or 3
Texture--muck
A horizon:
Color--hue of 10YR, value of 2 or 3, chroma of 1 or 2, hue of 2.5Y or 5Y, value of 2.5 or 3, chroma of 1 or 2, or is neutral with value of 2.5 or 3
Texture (fine-earth fraction)--coarse sandy loam, sandy loam, fine sandy loam, or loam and may include the mucky texture modifier.
Redoximorphic features (where present)--masses of oxidized iron in shades of red, yellow, or brown and iron depletions in shades of gray
Other features--Organic matter content of the A horizon ranges from 3 to about 20 percent
Cg horizon:
Color--hue of 10YR to 5Y, value of 4 to 8, chroma of 1 to 2, or is neutral with value of 4 to 7
Texture (fine-earth fraction)--coarse sand, sand, fine sand, loamy coarse sand, loamy sand, loamy fine sand, coarse sandy loam, sandy loam, fine sandy loam, or loam. Some pedons have thin strata of sandy clay loam.
Redoximorphic features (where present)--masses of oxidized iron in shades of red, yellow, or brown and iron depletions in shades of gray
COMPETING SERIES:
There are no other known series in this family.
GEOGRAPHIC SETTING:
Landscape: Lower to upper coastal plain
Landform: Flood plain, swamp
Geomorphic Component: Tread
Parent Material: Alluvium
Elevation: 20 to 450 feet
Mean Annual Air Temperature: 59 to 70 degrees F.
Mean Annual Precipitation: 38 to 52 inches
Frost Free Period: 190 to 245 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bibb soils--poorly drained, on similar landforms
Johns soils--somewhat poorly drained, on adjacent stream terraces
Kalmia soils--well drained, on adjacent stream terraces
Kenansville soils--well drained, on adjacent stream terraces
Kinston soils--poorly drained, on similar landforms
Lumbee soils--poorly drained, on adjacent stream terraces
Murville soils--have spodic materials
Osier soils--poorly drained, on adjacent stream terraces
Pamlico soils--organic soils
Paxville soils--have a fine-loamy particle-size control section, on adjacent stream terraces and drainageways
Pocomoke soils--have thicker surface layers, on adjacent stream terraces and drainageways
Rutlege soils--have a sandy particle-size control section, on similar landforms
Torhunta soils--have an umbric horizon, on similar landforms
DRAINAGE AND PERMEABILITY:
Depth Class: Very deep
Drainage Class (Agricultural): Very poorly drained
Internal Free Water Occurrence: Shallow, common
Flooding Frequency and Duration: Frequent or occasional for very brief to long periods
Ponding Frequency and Duration: None
Permeability: Moderately rapid
USE AND VEGETATION:
Major Uses: Woodland
Dominant Vegetation: Where wooded--water tupelo, swamp tupelo, sweetgum, yellow poplar, green ash, water oak, and baldcypress. Also, loblolly pine grows in areas that have been drained. Understory plants include inkberry (bitter gallberry), American holly, greenbrier, switchcane, blueberry, honeysuckle, and poison ivy. Where cultivated--corn, soybeans, and pasture.
DISTRIBUTION AND EXTENT:
Distribution: South Atlantic and Gulf Coastal Plain in Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, and Virginia
Extent: Moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Johnston County, North Carolina; 1911.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Umbric epipedon--the zone from the surface to a depth of 30 inches (A horizon)
ADDITIONAL DATA:
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation NC0043 JOHNSTON 0-2 57-70 190-245 38-52 20-450SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness NC0043 COMMON 0-1.0 APPARENT NOV-MAY >80 -
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- NC0043 0-30 MK-L 0-0 100-100 7-18 9-22 NC0043 0-30 L SL FSL 0-0 100-100 5-18 4-12 NC0043 30-34 SR LS S 0-0 100-100 2-12 1-5 NC0043 34-60 SR FSL SL 0-0 100-100 5-20 1-6
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll NC0043 0-30 3.5- 5.5 8.0-15 0-0 2.0-6.0 LOW NC0043 0-30 3.5- 5.5 3.0-8.0 0-0 2.0-6.0 LOW NC0043 30-34 3.5- 5.5 0.5-3.0 0-0 6.0-20 LOW NC0043 34-60 3.5- 5.5 0.0-2.0 0-0 6.0-20 LOW