LOCATION QUEPONCO MD
Tentative Series
SYD-CJH-AMH/Rev. PSK-JAK
09/2016
QUEPONCO SERIES
MLRA(s): 153C, 153D
TAXONOMIC CLASS: Fine-loamy, mixed, semiactive, mesic Typic Hapludults
Depth Class: Very Deep
Drainage Class (Agricultural): Well drained
Internal Free Water Occurrence: Deep (40 to 72 inches)and common (3 to 6 months)
Permeability: Moderate
Index Surface Runoff: Low
Landscape: Peninsula
Landform: Interfluves and broad interstream divides
Hillslope Profile Position: Summits, shoulders, and backslope
Geomorphic Component: Rise and talfs
Parent Material: Loamy fluvial and eolian deposits underlain by sandy and loamy fluvial and marine (fluviomarine) deposits
Slope: 0 to 5 percent
Elevation (type location): 5 feet
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, semiactive, mesic Typic Hapludults
TYPICAL PEDON: Queponco silt loam, (in an area of Queponco silt loam, 2 to 8 percent slopes) on a smooth 1 percent slope, in a fallow farm field. (Colors are for moist soil unless otherwise indicated.)
Ap--0 to 10 inches; yellowish brown (10YR 5/4) silt loam; moderate coarse and medium subangular blocky structure; friable; slightly sticky; slightly plastic; common fine and very fine roots throughout; many fine and very fine tubular pores throughout; few fine distinct brown (7.5YR 4/4) iron masses on ped faces and in pores; neutral; abrupt smooth boundary. (4 to 12 inches thick)
Bt1--10 to 17 inches; strong brown (7.5YR 5/8) silt loam; moderate fine and medium subangular structure; friable; slightly sticky; slightly plastic; common fine and very fine roots throughout; many fine tubular pores; common prominent dark yellowish brown (10YR 4/4) clay films on ped faces and in pores; moderately acid; clear smooth boundary. (5 to 27 inches thick)
2Bt2--17 to 24 inches; yellowish brown (10YR 5/6) loam; moderate medium and fine subangular blocky structure; friable; moderately sticky; slightly plastic; common very fine and fine roots throughout; many fine tubular pores; common fine distinct strong brown (7.5YR 5/6) irregular iron masses throughout; common distinct dark yellowish brown (10YR 4/4) clay films on ped faces and in pores; strongly acid; gradual smooth boundary.
2Bt3--24 to 31 inches; dark yellowish brown (10YR 4/6) sandy loam; moderate coarse and medium subangular blocky structure; friable; slightly sticky; slightly plastic; common fine roots throughout; many fine tubular pores; common distinct dark yellowish brown (10YR 4/4) clay films on ped faces and in pores; common fine distinct strong brown (7.5YR 5/6) irregular iron masses throughout; strongly acid; clear smooth boundary. (Combined thickness of Bt horizon is 5 to 23 inches.)
2CB--31 to 36 inches; yellowish brown (10YR 5/6) loamy sand; weak coarse subangular blocky structure; very friable; nonsticky; nonplastic; common fine tubular pores; common medium faint dark yellowish brown (10YR 4/4) irregular iron masses in pores; strongly acid; gradual smooth boundary. (0 to 19 inches thick)
2C1--36 to 40 inches; light yellowish brown (10YR 6/4) loamy sand; weak medium subangular blocky structure; very friable; nonsticky; nonplastic; common fine tubular pores; moderately acid; gradual smooth boundary.
2C2--40 to 49 inches; light yellowish brown (2.5Y 6/3) sand; weak medium subangular structure; very friable; nonsticky; nonplastic; common fine tubular pores; common medium yellowish brown (10YR 5/6) irregular iron masses throughout; common fine faint pale yellow 2.5Y 8/2) irregular iron depletions throughout; moderately acid; gradual smooth boundary.
2Cg--49 to 60 inches; 97 percent light brownish gray (2.5Y 6/2) and 3 percent black (N 2/0) sand; weak fine subangular blocky structure; very friable; nonsticky; nonplastic; common fine tubular pores; prominent discontinuous black (N 2/0) stains throughout; common medium platy prominent yellowish brown (10YR 5/6) iron masses in two separate continuous bands about 1/4 inch thick; slightly acid; clear smooth boundary. (0 to 11 inches thick)
2C'--60 to 72 inches; light olive brown (2.5Y 5/4) sand; single grain; loose; nonsticky; nonplastic; common medium prominent strong brown (7.5YR 4/6) irregular iron masses throughout; 2 percent, by volume quartzite and chert pebbles; slightly acid.
TYPE LOCATION: Somerset County, Maryland; about 0.75 mile west of the intersection of Fitzgerald Road and Black Road (State Rt. 627) near Venton on Fitzgerald Road, north on farm lane about 2,000 feet to cultivated field just north of private cemetery; USGS Monie, Maryland topographic quadrangle; lat. 38 degrees 12 minutes 14.12 seconds N. and long. 75 degrees 47 minutes 41.37 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Depth to top of Argillic horizon: 4 to 14 inches
Depth to base of Argillic horizon: 25 to 45 inches
Depth to Bedrock: Greater than 72 inches
Depth to Seasonal High Water Table: 40 to 72 inches, January to May
Rock Fragments: 0 to 20 percent, by volume quartzite and chert pebbles below the lithologic discontinuity
Soil Reaction: Strongly acid to neutral throughout the profile, unless limed. Inherently these soils have a low base status.
Depth to Lithologic Discontinuity: 15 to 40 inches
Silt content: 40 to 60 percent in layers above the lithologic discontinuity
RANGE OF INDIVIDUAL HORIZONS:
Ap or A horizon:
Color--hue of 10YR, value of 4 or 5, chroma of 2 to 4
Texture--loam or silt loam
BE horizon (if it occurs):
Color--hue of 10YR or 2.5Y, value of 4 or 5, chroma of 3 or 4
Texture--loam or silt loam
Bt horizon:
Color--hue of 7.5YR or 10YR, value of 4 or 5, chroma of 4 to 8
Texture--loam or silt loam
2Bt horizon:
Color--hue of 7.5YR to 2.5Y, value of 4 to 6, chroma of 4 to 6
Texture--sandy loam or loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow, or brown
2CB horizon or BC horizon (if it occurs):
Color--hue of 7.5YR or 10YR, value of 4 or 5, chroma of 3 to 8
Texture--loamy sand 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
2C horizon:
Color--hue of 7.5YR to 2.5Y, value of 5 to 8, chroma of 3 to 8
Texture--sand or loamy 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 10YR or 2.5Y, value of 6 to 8, chroma of 1 or 2
Texture--sand or loamy 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
COMPETING SERIES:
There are more than 45 series in the same family. Soils listed in this section formed in similar parent materials and are within the same MLRA or adjoining MLRAs.
Freehold soils--do not have a silty mantle and have 2 to 10 percent, by volume glauconite in the particle-size control section; on ridges and side slopes
Wist soils--do not have a silty mantle, have 2 to 20 percent, by volume glauconite in the particle-size control section, and have a seasonal high water table at a depth of 40 to 72 inches; on ridges and side slopes
Sassafras soils--do not have a seasonal high water table with in 72 inches; on higher landforms
Reybold soils--do not have a seasonal high water table with in 72 inches; on higher landforms
Hambrook soils--have less than 45 percent very fine sand and silt in the profile
Marr soils--do not have a seasonal high water table with in 72 inches; on higher landforms
GEOGRAPHIC SETTING:
Landscape: Peninsula
Landform: Interfluves and broad interstream divides
Hillslope Profile Position: Summits, shoulders, and backslopes
Geomorphic Component: Rise and talfs
Parent Material: Loamy fluvial and eolian deposits underlain by sandy and loamy fluvial and marine (Fluviomarine) deposits
Elevation: 5 to 20 feet
Mean Annual Air Temperature (Princess Anne, MD): 56 to 59 degrees F.
Mean Annual Precipitation (Princess Anne, MD): 42 to 46 inches
Frost Free Period: 200 to 232 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Matapeake soils--do not have a seasonal high water table within 72 inches and have a fine-silty particle size class; on similar landforms
Mattapex soils--have a seasonal high water table between 20 and 40 inches and have a fine-silty particle size class; on similar landforms
Sassafras soils--do not have a seasonal water table between 40 and 72 inches and have silt contents less than 40 percent; on similar landforms
Hambrook soils--have silt contents typically less than 40 percent; on similar landforms
Woodstown soils--have a seasonal water table at a depth of 20 and 40 inches below the soil surface; on similar landforms
Nassawango soils--have a fine-silty particle size class; on similar landforms
Reybold soils--do not have a seasonal water table within 72 inches of the soil surface
DRAINAGE AND PERMEABILITY:
Drainage class (Agricultural): Well drained
Index Surface Runoff: Low
Internal Free Water Occurrence: Deep (40 to 72 inches) and common (present 3 to 6 months)
Permeability: Moderate in the subsoil and rapid in the underlying material
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: RALEIGH, NORTH CAROLINA
Major Uses: Cultivated crops
Dominant Vegetation: Where cultivated--mostly agronomic crops such as corn, wheat and soybeans and to a lesser extent truck crops. Where wooded--upper story species include white oak (Qercus alba), American holly (Ilex opaca), sweet gum (Liquidambar styraciflua), loblolly pine (Pinus taeda), pignut hickory (Carya glabra), sassafras (Sassafras albidum), Virginia pine (Pinus virginiana).
DISTRIBUTION AND EXTENT:
Distribution: MLRA 153D Northern Tidewater area of Maryland, and possible Delaware
Extent: The series is small; 5,000 to 10,000 acres
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES PROPOSED: Somerset County, Maryland, 2000.
REMARKS: Queponco soils were previously mapped with the Matapeake series. Queponco soils are differentiated from Matapeake by having a particle-size control section that is fine-loamy rather than fine-silty and having a seasonal water table between 40 and 72 inches.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from 0 to 10 inches (Ap horizon)
Argillic horizon--the zone from 10 to 31 inches (Bt horizon)
Other soil features identified in this pedon:
Series control section--the zone from 0 to 60 inches
ADDITIONAL DATA: This pedon sampled as S00MD039-005. Additional reference samples include sample numbers S99MD039-046-1, 3,4 and 5 (University of Maryland, College Park, MD).
Data Mapunit ID: To be developed.
National Cooperative Soil Survey
U.S.A.