LOCATION MANOKIN MD
Tentative Series
SYD-AMH/Rev. DHK
09/2016
MANOKIN SERIES
MLRA(s): 153C, 153D
TAXONOMIC CLASS: Fine-loamy, mixed, active, mesic Aquic Hapludults
Depth Class: Very deep
Drainage Class (Agricultural): Moderately well drained
Internal Free Water Occurrence: Moderately deep (20 to 40 inches) and common (3 to 6 months)
Index Surface Runoff: Very low
Permeability: Moderate in the solum and rapid in the underlying material
Landscape: Coastal plain, upland
Landform: Interfluves, broad upstream divides, and flats
Hillslope Profile Position:
Geomorphic Component: Dip, rise and talf
Elevation: 5 to 20 feet
Parent Material: Silty eolian deposits over fluviomarine sediments
Slope: 0 to 5 percent
Mean Annual Air Temperature (type location near Princess Anne, MD): 57 degrees F.
Mean Annual Precipitation (type location near Princess Anne, MD): 46 inches
TAXONOMIC CLASS: Fine-loamy, mixed, active, mesic Aquic Hapludults
TYPICAL PEDON: Manokin silt loam on a nearly level 1 percent slope in a cultivated field at an elevation of 5 feet. (Colors are for moist soil unless otherwise indicated.)
Ap1--to 1 inches; brown (10YR 4/3) silt loam, pale brown (10YR 6/3) dry; moderate medium subangular blocky structure parting to moderate coarse and very coarse granular; very friable, nonsticky, nonplastic; common very fine roots throughout; common very fine vesicular and few coarse tubular pores throughout; slightly acid; clear smooth boundary.
Ap2--1 to 12 inches; brown (10YR 4/3) silt loam, pale brown (10YR 6/3) dry; moderate very coarse subangular blocky structure; nonsticky, very friable, nonplastic; common very fine roots throughout; common very fine and medium vesicular pores and common coarse tubular pores throughout; slightly acid; abrupt smooth boundary. (Combined thickness of the Ap horizons ranges from 4 to 12 inches).
BE--12 to 17 inches; yellowish brown (10YR 5/4) silt loam; moderate coarse subangular blocky structure; friable, nonsticky, nonplastic; common very fine roots throughout; common very fine vesicular and common coarse tubular pores throughout; moderately acid; clear wavy boundary. (0 to 7 inches thick)
Bt1--17 to 23 inches; yellowish brown (10YR 5/6) silt loam; strong coarse and very coarse subangular blocky structure; friable, nonsticky, slightly plastic; common very fine roots throughout; common fine and coarse tubular pores and common very fine vesicular pores throughout; strongly acid; clear wavy boundary.
2Bt2--23 to 29 inches; yellowish brown (10YR 5/6) clay loam; moderate coarse subangular blocky structure; firm, nonsticky, slightly plastic; common very fine roots throughout; common coarse tubular pores throughout; common fine strong brown (7.5YR 4/6 and 5/6) irregular iron masses throughout; common fine and medium light gray (2.5Y 7/2) and common medium yellowish brown (10YR 5/4) irregular iron depletions throughout; few, faint yellowish brown (10YR 5/6) clay films on ped faces; very strongly acid; clear smooth boundary. (4 to 12 inches thick)
2Bt3--29 to 37 inches; yellowish brown (10YR 5/4) loam; firm, nonsticky, slightly plastic; moderate coarse subangular blocky structure; common very fine roots throughout; common coarse tubular pores throughout; common fine strong brown (7.5YR 4/6) irregular iron masses throughout; common fine and medium light brownish gray (10YR 6/2) irregular iron depletions throughout; few, faint yellowish brown (10YR 5/6) clay films on ped faces; very strongly acid; clear smooth boundary. (Combined thickness of the 2Bt horizons ranges from 5 to 20 inches)
2CB--37 to 43 inches; light olive brown (2.5Y 5/4) fine sandy loam; massive; friable, nonsticky, nonplastic; common fine dark yellowish brown (10YR 4/6) irregular iron masses throughout; common medium and coarse irregular light gray (2.5Y 7/2) iron depletions throughout; very strongly acid; clear smooth boundary. (0 to 20 inches thick)
2Cg1--43 to 61 inches; light gray (2.5Y 7/2) loamy sand; single grain; loose, nonsticky, nonplastic; very strongly acid; clear smooth boundary.
2Cg2--61 to 75 inches; light gray (2.5Y 7/2) sand; single grain; loose, nonsticky, nonplastic; very strongly acid.
TYPE LOCATION: Somerset County, Maryland; Deal Island Road (Rt. 363) west of Rt. 13 to Anderson Road, south on Anderson Road approximately 1.1 miles to farm lane on west side of Anderson Road; 1800 feet on farm lane to site. USGS Monie, Maryland, topographic quadrangle; lat. 38 degrees 10 minutes 39.9 seconds N. long. 75 degrees 46 minutes 35.6 seconds W. NAD 83.
RANGE IN CHARACTERISTICS:
Depth to the Base of the Argillic: 15 to 52 inches
Depth to Bedrock: Greater than 72 inches
Depth to Seasonal High Water Table: 20 to 40 inches, December through May
Rock Fragments: 0 to 15 percent, by volume, in the 2C horizon; none above the 2C horizon
Soil Reaction: Very strongly acid to slightly acid
Silt content: 35 to 60 percent in the particle size control section
RANGE OF INDIVIDUAL HORIZONS:
Ap horizon:
Color--hue of 7.5YR to 2.5Y, value of 3 to 5, and chroma of 2 to 4
Texture (fine-earth fraction)--loam or silt loam
E horizon (or similar transitional horizons, if they occur):
Color--hue of 10YR or 2.5Y, value of 5 to 7, and chroma of 3 to 6
Texture (fine-earth fraction)--loam or silt loam
Bt horizon:
Color--hue of 7.5YR to 2.5Y, value of 4 to 6, chroma of 3 to 6
Texture (fine-earth fraction)--silt loam, silty clay loam, or loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow, or brown and iron
depletions in shades of brown, yellow, olive, or gray
2Bt horizon:
Color--hue of 7.5YR to 2.5Y, value of 4 to 6, chroma of 3 to 6
Texture (fine-earth fraction)--sandy loam, sandy clay loam, loam, silt loam, or clay loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow, or brown and iron
depletions in shades of brown, yellow, olive, or gray
2BC or 2CB horizon:
Color--hue of 7.5YR to 2.5Y, value of 4 to 7, chroma of 3 to 8
Texture (fine-earth fraction)--sand, loamy coarse sand, loamy sand, coarse sandy loam, sandy loam, or fine sandy loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow, or brown and iron
depletions in shades of brown, yellow, olive, or gray
Note: Some pedons have 2BCg or 2CBg horizons that have similar properties, but have chroma of 1 or 2
2C horizon (if it occurs):
Color--hue of 10YR to 2.5Y, value of 4 to 7, chroma of 3 to 6
Texture (fine-earth fraction)coarse sand, sand, loamy coarse sand, loamy sand, or loamy fine sand
Redoximorphic features (if they occur)--iron masses in shades of red, yellow, or brown and iron
depletions in shades of brown, yellow, olive, or gray
2Cg horizon:
Color--hue of 7.5YR to 2.5Y, value of 5 to 8, chroma of 1 or 2
Texture (fine-earth fraction)--coarse sand, sand, loamy coarse sand, loamy sand, loamy fine sand, coarse sandy loam, or sandy loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow, or brown and iron
depletions in shades of brown, yellow, olive, or gray
COMPETING SERIES:
Adelphia soils--formed in loamy marine sediments that contain 10 to 40 percent, by volume glauconite in the subsoil, on slightly higher landforms
Bigpool soils--formed in alluvium derived from sedimentary rocks
Blairton soils--formed in residuum from gray shale and are moderately deep to hard bedrock
Holmdel soils--formed in loamy marine sediments that contain 2 to 10 percent, by volume glauconite in the subsoil, on slightly higher landforms
Kensington (T) soils--formed in glacial till and underlying residuum from shale, fine grained sandstone or siltstone and are deep to hard, sedimentary bedrock
Trackler soils--formed in colluvium and residuum from fine-grained igneous rocks
Wharton soils--formed in residuum from sandstone, siltstone, and shale
Whiteside soils--formed in colluvium in the Southern Appalachian Mountains
Woodstown soils--formed in sandy marine and old alluvial sediments, do not have a lithologic discontinuity, generally on slightly higher landforms
GEOGRAPHIC SETTING:
Landscape: Coastal Plain, uplands
Landform: Interfluves, broad interstream divides, and flats
Hillslope Profile Position:
Geomorphic Component: Dip, rise and talf
Elevation: 5 to 20 feet
Parent Material: Silty eolian deposits over sandy fluviomarine sediments
Mean Annual Air Temperature: 56 to 59 degrees
Mean Annual Precipitation: 42 to 46 inches
Frost Free Period: 200 to 232 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Annemessex--somewhat poorly drained, on slightly lower landforms
Glassboro--coarse-loamy PSC, on slightly lower landforms
Mattapex--fine-silty PSC, on similar landforms
DRAINAGE AND PERMEABILITY:
Drainage class (Agricultural): Moderately well drained
Index Surface Runoff: Very low and low
Internal Free Water Occurrence: Moderately deep (20 to 40 inches) and common (3 to 6 months), December through May
Permeability: Moderate in the solum and rapid in the underlying material
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: RALEIGH, NORTH CAROLINA
Major Uses: Cultivated crops. Where cultivated, mostly agronomic crops such as corn, wheat and soybeans and to a lesser extent truck crops.
DISTRIBUTION AND EXTENT:
Distribution: MLRAs 153C and 153D within Maryland
Extent: Small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES PROPOSED: Somerset County, Maryland, 2000.
REMARKS: Manokin soils were previously mapped as Mattapex. Manokin soils differ from Mattapex by having a particle control section that is fine-loamy rather than fine-silty. Manokin is named for a tributary of Tangier Sound (bordered by Hazard Point to the north and South Deal Island to the south). Manokin
is an Algonquin (native American tribe) word which translated means earth dug out.
Below 75 inches few medium strong brown (7.5YR 5/8) iron concentrations were observed in this pedon.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from 0 to 17 inches (Ap1, Ap2 and BE horizons)
Argillic horizon--the zone from 17 to 37 inches (Bt1, 2Bt2 and 2Bt3 horizons)
Aquic subgroup--the soil has redox depletions with color value of 4 or more and chroma of 2 or less, and redox concentrations within the upper 24 inches of the argillic horizon, with periodic saturation and reduction at some time during the year
Lithologic discontinuity at 23 inches
Series control section--the zone from 0 to 60 inches
ADDITIONAL DATA: This pedon sampled as S00MD039-010. Additional reference samples include sample numbers S99MD039021-1, 2, S039024-1, 2, S99039030-1, 2, 3, S00MD039084-2, 3, 4 (University of Maryland, College Park, MD) on file at Somerset County, MD Field Office.
Data Map Unit ID: 40016 (under development).
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation
Revised: 02/2003-SYD, AMH, PHK; 02/2005-SYD, AMH, DHK
National Cooperative Soil Survey
U.S.A.