LOCATION ISSUE MD
Established Series
EHE-MLS-DRPV-SLD/Rev. JWB
11/2015
ISSUE SERIES
MLRA(s): 149A (Northern Coastal Plain)
Depth Class: Very deep
Drainage Class (Agricultural): Somewhat poorly drained
Saturated Hydraulic Conductivity Class: Moderately high to high
Landscape: Coastal Plain
Parent Material: Loamy and sandy alluvium
Slope: 0 to 5 percent
Mean Annual Air Temperature (type location): 13 degrees C. (55 degrees F.)
Mean Annual Precipitation (type location): 1219 mm (48 inches)
TAXONOMIC CLASS: Coarse-loamy, mixed, active, mesic Fluvaquentic Dystrudepts
TYPICAL PEDON: Issue silt loam in an idle field. (Colors are for moist soil unless otherwise indicated.)
Ap--0 to 10 cm (0 to 4 inches); dark yellowish brown (10YR 4/4) silt loam; light olive brown (2.5Y 5/4) dry; moderate medium subangular blocky parting to strong coarse granular; friable; moderately sticky; moderately plastic; common fine and very fine and few medium roots throughout; common fine tubular pores; trace subrounded mixed gravel; very strongly acid; clear smooth boundary. (0 to 18 cm thick)
Bw--10 to 48 cm (4 to 19 inches); yellowish brown (10YR 5/4) silt loam; strong coarse prismatic structure parting to moderate medium subangular blocky; friable; slightly sticky; moderately plastic; few very fine, very few fine and few medium roots throughout; very few medium and coarse vesicular pores; many medium and coarse faint light olive brown (2.5Y 5/3) irregular iron depletions; common medium distinct very pale brown (10YR 8/3) clay depletions on faces of peds; common medium and coarse prominent yellowish red (5YR 5/8) irregular iron-manganese masses throughout; very strongly acid; abrupt wavy boundary. (15 to 51 cm thick)
Bg1--48 to 64 cm (19 to 25 inches); 50 percent gray (10YR 6/1) very fine sandy loam and 40 percent reddish yellow (5YR 6/8) loamy very fine sand; weak coarse prismatic structure; very friable; slightly sticky; nonplastic; few fine and medium roots throughout; very few medium tubular and vesicular pores; very strongly acid; abrupt smooth boundary.
Bg2--64 to 76 cm (25 to 30 inches); 70 percent light gray (2.5Y 7/1) fine sand and 15 percent gray (2.5Y 5/1) loamy fine sand; single grain; loose; nonsticky; nonplastic; very few very fine and fine roots; very few fine vesicular pores; common fine and medium prominent yellowish red (5YR 5/8) iron-manganese masses; few fine fragments of charcoal; few fine mica flakes; very strongly acid; abrupt smooth boundary.
Bg3--76 to 97 cm (30 to 38 inches); gray (2.5Y 5/1) fine sandy loam, weak coarse prismatic structure; friable; nonsticky; nonplastic; very few very fine roots; very few fine vesicular pores; common medium prominent rounded yellowish red (5YR 5/8) iron-manganese masses; trace charcoal; very strongly acid; abrupt smooth boundary.
Bg4--97 to 107 cm (38 to 42 inches); light gray (2.5Y 7/2) fine sand; single grain; loose; nonsticky; nonplastic; common fine prominent rounded strong brown (7.5YR 5/8) iron-manganese masses; few fine mica flakes; very strongly acid; abrupt smooth boundary.
Bg5--107 to 147 cm (42 to 58 inches); stratified 50 percent gray (2.5Y 6/1) loamy fine sand, 25 percent gray (2.5Y 5/1) loam and 25 percent gray (2.5Y 6/1) fine sand; loamy fine sand and loam parts have weak coarse prismatic structure; very friable; fine sand part is single grain; loose; nonsticky, nonplastic; very few very fine tubular pores; common fine prominent dendritic red (2.5YR 4/8) iron-manganese masses; extremely acid; abrupt smooth boundary. (combined thickness of the Bg horizons is 25 to 127 cm thick)
2Ab--147 to 178 cm (58 to 70 inches); dark gray (2.5Y 4/1) loam; weak coarse prismatic structure; friable; slightly sticky; moderately plastic; common decomposed medium and coarse roots; hydrogen sulfide odor; very strongly acid.
TYPE LOCATION: Prince Georges, MD; about 7.15 miles north-northeast of Aquasco, 1.8 miles south of Nottingham, 0.95 miles north of White Landing, 1.25 miles east-northeast of the intersection of MD Route 382 Croom Road and River Airport Road. USGS Lower Marlboro topographic quadrangle; Lat. 38 degrees, 41 minutes, 2.02 seconds N. and Long. 76 degrees, 42 minutes, 5.05 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Depth to the top of the Cambic: 8 to 25 cm (3 to 10 inches)
Depth to the bottom of the Cambic: 25 to 102 cm (10 to 40 inches)
Solum Thickness: 51 to 183 cm (20 to 72 inches)
Depth to Bedrock: Greater than 183 cm (72 inches)
Depth to Seasonal High Water Table: 25 to 51 cm (10 to 20 inches), November to May
Rock Fragments: 0 to 15 percent, by volume, in the A and Bw horizons; 0 to 60 in the Bg horizon
Soil Reaction: slightly acid to extremely acid, except where limed
Other Soil Features: Irregular decrease of organic matter content with depth
RANGE OF INDIVIDUAL HORIZONS:
A or Ap horizon:
Color--hue of 10YR or 2.5Y, value of 3 or 4 and chroma of 2 to 4
Texture (fine-earth fraction)--loamy sand, sandy loam, fine sandy loam, loam or silt loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow or brown and iron depletions in shades of olive or gray
Bw horizon:
Color--hue of 10YR or 2.5Y, value of 4 to 6 and chroma of 3 or 4
Texture (fine-earth fraction)--fine sand, loamy fine sand, loamy very fine sand, sandy loam, fine sandy loam, very fine sandy loam, loam or silt loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow or brown and iron depletions in shades of brown, olive or gray. (2 chroma features are at a depth of 25 cm or greater).
Bg or B'g horizon:
Color--hue of 10YR or 2.5Y, value of 3 to 7 and chroma of 1 or 2
Texture (fine-earth fraction)--fine sand, loamy fine sand, loamy very fine sand, sandy loam, fine sandy loam, very fine sandy loam, loam or silt loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow or brown and iron depletions in shades of olive or gray
BCg or BCg horizon (if it occurs):
Color--hue of 10YR or 2.5Y, value of 3 to 7 and chroma of 1 or 2
Texture (fine-earth fraction)--fine sand, loamy fine sand, sandy loam, fine sandy loam, loam or silt loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow or brown and iron depletions in shades of olive or gray
C or Cg horizon (if it occurs):
Color--hue of 10YR or 2.5Y, value of 3 to 7 and chroma of 1 to 4, or is neutral with value of 3 to 6
Texture (fine-earth fraction)--fine sand, loamy fine sand, sandy loam, fine sandy loam, loam or silt loam
Redoximorphic features (if they occur)--iron masses in shades of red, yellow or brown and iron depletions in shades of olive or gray
2Ab or Ab horizon (if it occurs):
Color--hue of 10YR or 2.5Y, value of 3 to 6, and chroma of 1 to 4, or is neutral with value of 2 or 3
Texture (fine-earth fraction)--fine sand, loamy fine sand, sandy loam, fine sandy loam, loam or silt loam
Redoximorphic features (if they occur)--iron masses in shades of black, red, yellow or brown, and iron depletions in shades of olive or gray
COMPETING SERIES:
Basher soils--are moderately well drained; have formed in alluvium derived from acid, reddish siltstone, sandstone and shale
Iotla soils--have formed in loamy recent alluvium on flood plains of the southern Appalachian Mountains
Philo soils--are moderately well drained; have formed in recent alluvium derived from sandstone and shale
Pootatuck soils--are moderately well drained; have formed in recent alluvium derived from granite, gneiss and schist
GEOGRAPHIC SETTING:
Landscape: Coastal Plain
Landform: Flood plain
Parent Material: Loamy and sandy alluvium
Slope: 0 to 5 percent
Elevation: 0 to 76 meters (0 to 250 feet)
Frost-free period: 165 to 232 days
Mean Annual Air Temperature: 10 to 13 degrees C. (50 to 56 degrees)
Mean Annual Precipitation: 914 to 1270 mm (36 to 50 inches)
GEOGRAPHICALLY ASSOCIATED SOILS:
Marr soils--well drained soils on terrace treads, footslopes and alluvial fans
Potobac soils--poorly drained soils on lower flood plain positions
Widewater soils--poorly drained soils with more clay in the subsoil on lower flood plain positions
Fallsington soils--poorly drained soils that have greater profile development at heads of drainageways
Dodon soils--moderately well drained soils on footslopes, toeslopes, alluvial fans and treads
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class (Agricultural): Somewhat poorly drained
Internal Free Water Occurrence: Shallow and common
Index Surface Runoff: High or very high
Saturated Hydraulic Conductivity Class: Moderately high to high
Permeability Class (obsolete): Moderately rapid to moderate
Shrink-swell Potential: Low
Flooding Frequency and Duration: Occasional or frequent and brief or very brief
Ponding Frequency and Duration: None
USE AND VEGETATION:
Major Uses: Pasture, woodland
Dominant Vegetation: Where cultivated--grass-legume mixed pasture. Where wooded--sweetgum (Liquidambar styraciflua), ash (Fraxinus spp.), sycamore (Platanus occidentalis), red maple (Acer rubrum), American holly (Ilex opaca), loblolly pine and shortleaf pine, spicebush (Lindera benzoin), greenbrier (Smilax spp.).
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: RALEIGH, NORTH CAROLINA
Distribution: Flood plains of the mid-Atlantic Coastal Plain of Maryland, Delaware, and possibly New Jersey
Extent: Moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Anne Arundel County, Maryland, 2003.
REMARKS: Issue soils were previously mapped as Iuka, Bibb and Mixed Alluvial miscellaneous areas.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from 0 to 10 cm (Ap horizon)
Cambic horizon--the zone from 10 to 51 cm (Bw and Bg1 horizons) Aquic conditions--the soil has redox depletions and concentrations within 60 cm of the soil surface, with periodic saturation and reduction at some time during the year
Other soil features identified with this pedon: Irregular organic matter distribution throughout the profile
Series control section--the zone from 0 to 150 cm
ADDITIONAL DATA: NSSL data is available for the Typical Pedon for the series. Pedon ID S01MD-033-004.
The 2007 revision adds value of 7 to the Cg horizon range of characteristics and introduces metric units
Previous revisions: 04/2003-EHE, MLS, DRPV, SLD; 07/2003-SLD, DHK; 08/2005-JWB
OSD Data Map Unit ID: To be developed
Typical Pedon Data Mapunit ID: To be developed
OSD User Pedon ID: Issue-OSD
National Cooperative Soil Survey
U.S.A.