LOCATION MANNINGTON NJ+DE MDEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, nonacid, mesic Thapto-Histic Hydraquents
TYPICAL PEDON: Mannington mucky silt loam on a smooth 0 percent slope, in an estuarine tidal marsh. (Colors are for moist soil.)
Ag--0 to 36 cm (0 to 14 inches); very dark gray (5Y 3/1) mucky silt loam; massive; friable; slightly sticky, slightly plastic; many very fine, fine, and medium roots; n-value greater than 1.0, material flows between the fingers easily when squeezed; 15 percent organic matter; moderately acid; clear smooth boundary. (20 to 48 cm thick)
Cg--36 to 81 cm (14 to 32 inches); dark gray (5Y 4/1) silt loam; massive; friable, slightly sticky, slightly plastic; few very fine and fine roots; n-value greater than 1.0, material flows between the fingers easily when squeezed; 8 percent organic matter; moderately acid; gradual smooth boundary. (25 to 76 cm thick)
Oa--81 to 107 cm (32 to 42 inches); black (5YR 2.5/1) muck; sapric soil material; fiber content is 15 percent of the soil volume after rubbing; 10 percent by weight mineral soil material; strongly acid; clear smooth boundary.
Oe--107 to 132 cm (42 to 52 inches); very dark gray (5YR 3/1) mucky peat, hemic soil material; fiber content is 20 percent of the soil volume after rubbing; massive; 15 percent by weight mineral soil material; slightly acid; abrupt smooth boundary. (Combined thickness of the O horizon is 25 to 89 cm )
C'g1--132 to 157 cm (52 to 62 inches); dark gray (5Y 4/1) mucky silt loam; massive; friable, slightly sticky, slightly plastic; n-value greater than 1.0, material flows easily between the fingers when squeezed; 15 percent organic matter; moderately acid; gradual smooth boundary.
C'g2--157 to 229 cm (62 to 90 inches); dark gray (5Y 4/1) silt loam; massive; friable, slightly sticky, slightly plastic; n-value greater than 1.0, material flows easily between the fingers when squeezed; 10 percent organic matter; moderately acid.
TYPE LOCATION: Salem County, New Jersey; about 0.75 mile south of state boat ramp off Hook Road in Kates Creek Meadow;
USGS Penns Grove Quadrangle; lat. 39 degrees 37 minutes 43 seconds N. and long. 75 degrees 28 minutes 41 seconds W.; NAD 83.
RANGE IN CHARACTERISTICS:
Thickness of the Surface Mineral Layers: 51 to 127 cm (20 to 50 inches)
Thickness of the Underlying Organic Layers: 25 to 89 cm (10 to 35 inches)
Depth to Bedrock: Greater than 200 cm (79 inches)
Depth to Seasonal High Water Table: 0 to 15 cm (0 to 6 inches), January to December; flooded by tidally influenced fresh water twice daily and by storm surge events
Rock Fragments: 0 to 5 percent by volume throughout the profile, mostly quartzite gravel
Soil Reaction: Moderately acid to neutral throughout the profile
Electrical Conductivity: 1 to 4 mmhos/cm
Other Features: n-value is typically greater than 1.0 and ranges from 0.7 to 1.0 in the C'g horizon
RANGE OF INDIVIDUAL HORIZONS:
Ag horizon:
Color--hue of 7.5YR to 5GY, value of 2 to 4, chroma of 1 or 2, or is neutral with value of 2 to 4
Texture--silt loam or mucky silt loam
Redoximorphic Features--iron depletions in shades of white or gray and iron accumulations are in shades of red, brown, yellow, or olive
Organic Matter Content: 2 to 12 percent
Cg horizon:
Color--hue of 7.5YR to 5GY, value of 3 to 6, chroma of 1 or 2, or is neutral with value of 4 to 6
Texture--silt loam, mucky silt loam, silty clay loam
Redoximorphic Features--iron depletions in shades of white or gray and iron accumulations are in shades of red, brown, yellow, or olive
Organic Matter Content: 2 to 12 percent
Oa or Oe horizon:
Color--hue of 5YR to 10YR, value of 2 to 3, chroma of 1 or 3, or is neutral with value of 2 or 3
Texture--muck or mucky peat (sapric or hemic soil materials)
Mineral Matter Content: 10 to 50 percent
C'g horizon:
Color--hue of 10YR to 5GY, value of 3 to 6, chroma of 1 or 2, or is neutral with value of 4 to 6
Texture--silt loam, mucky silt loam, or silty clay loam. Some pedon have thin strata of sandy loam, fine sandy loam, or very fine sandy loam. Strata, less than 1 inch thick, of sand or organic materials may also occur within the horizon.
Redoximorphic Features--iron depletions in shades of white or gray and iron accumulations are in shades of red, brown, yellow, or olive
Organic Matter Content: 2 to 12 percent
COMPETING SERIES:
None
GEOGRAPHIC SETTING:
Landscape: Coastal Plain lowlands
Landform: Fresh water estuarine marshes along tidally influenced rivers and streams
Elevation: Less than 0.6 meters (2 feet) above mean sea level
Parent Material: Silty and loamy alluvial sediments underlain by a sequence of organic and mineral layers
Mean Annual Air Temperature: 10 to 14 degrees C. (50 to 58 degrees F.)
Mean Annual Precipitation: 1016 to 1219 mm (40 to 48 inches)
Frost Free Period: 160 to 220 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Nanticoke soils--do not have underlying organic horizons, on similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage Class (Agricultural): Very poorly drained
Internal Free Water Occurrence: 0 to 6 inches (very shallow), January to December (continuous)
Flooding Frequency and Duration: Very frequent and very brief ; flooded by tidally influenced fresh water twice daily and by storm surge events
Ponding Frequency and Duration: None
Index Surface Runoff: Low or negligible
Saturated Hydraulic Conductivity: Moderately high in the upper mineral horizons, and high to very high in the underlying organic and mineral horizons
Permeability (obsolete): Moderately slow in the upper mineral layers and moderately rapid to rapid in the underlying organic and mineral layers
Shrink-swell Potential: Low
USE AND VEGETATION:
Major Uses: Wetland wildlife habitat
Dominant Vegetation: Native vegetation is dominantly arrow arum (Peltandra virginica), sweet flag (Acorus calamus), spatterdock (Nuphar luteum), and pickerelweed (Pontederia cordata)
DISTRIBUTION AND EXTENT: Inner Coastal Plain of New Jersey, Delaware and Maryland; extent is small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Worcester County, Maryland, 1995.
REMARKS: Mannington soils were previously mapped as tidal marsh or fresh water marsh miscellaneous land types. This series was first proposed in Salem County, New Jersey, in 1993, but was first correlated in Maryland in 1995.
Diagnostic horizons and other diagnostic soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from the soil surface to a depth of 36 cm (Ag horizon).
Aquic conditions--the zone from the soil surface to a depth of 200 cm is periodically saturated (endosaturation)
High n-value--the zone from the soil surface to 81 cm and from 132 to 229 cm flows easily between the fingers when squeezed.
A buried organic horizon, at least 20 cm thick, that has its upper boundary within 100 cm of the mineral soil surface.
Revisions: 11/2002-SG, SK, CS, JAK; 08/2003-DHK; 03/2005-DHK, 06/2006-JWB