LOCATION MAGNOLIA MD
Established Series
EHE-SLD-DRPV/Rev.JWB
11/2019
MAGNOLIA SERIES
MLRA(s): 149A (Northern Coastal Plain)
Depth Class: Very deep
Drainage Class (Agricultural): Well drained
Saturated Hydraulic Conductivity Class: Moderately high to high
Landscape: Coastal Plain, upland
Parent Material: Loamy and clayey fluviomarine sediments
Slope: 0 to 25 percent
Mean Annual Air Temperature (type location): 13 degrees C. (56 degrees F.)
Mean Annual Precipitation (type location): 1067 mm (42 inches )
TAXONOMIC CLASS: Fine-loamy, mixed, semiactive, mesic Typic Paleudalfs
TYPICAL PEDON: Magnolia silt loam in a flat (0 percent slope) wooded area. (Colors are for moist soil unless otherwise indicated.)
Ap1--0 to 8 cm (0 to 3 inches); very dark grayish brown (10YR 3/2) silt loam; moderate medium subangular blocky structure and moderate coarse granular; very friable; slightly sticky; nonplastic; common very fine, fine and medium and many coarse and very coarse roots throughout; extremely acid; abrupt smooth boundary.
Ap2--8 to 18 cm (3 to 7 inches); brown (7.5YR 4/4) silt loam; weak medium subangular blocky structure; very friable; slightly sticky, slightly plastic; few very fine roots, common medium and few coarse roots; few fine, medium, and coarse tubular pores; few black (10YR 2/1) organic stains; extremely acid; abrupt wavy boundary. (combined thickness of the A or Ap horizons is 5 to 51 cm thick)
Bt1--18 to 38 cm (7 to 15 inches); 50 percent brown (7.5YR 4/4) and 50 percent strong brown (7.5YR 5/8) silt loam; weak fine subangular blocky structure; very friable; sticky, plastic; few very fine, fine, medium and coarse roots; few fine, medium and coarse tubular pores; 5 percent round fine and medium black (10YR 2/1) manganese nodules throughout; extremely acid; clear wavy boundary.
Bt2--38 to 48 cm (15 to 19 inches); yellowish red (5YR 4/6) silt loam; moderate medium subangular blocky structure; very friable; sticky, plastic; few very fine, fine and medium roots throughout; few coarse tubular pores; 2 percent round fine black (10YR 2/1) manganese nodules; common distinct patchy yellowish red (5YR 4/6) clay films on faces of peds and in pores; very strongly acid; clear wavy boundary.
Bt3--48 to 69 cm (19 to 27 inches); yellowish red (5YR 4/6) clay loam; strong coarse and medium angular blocky structure; very friable; sticky, plastic; few very fine, fine and medium roots throughout; few very fine, fine and medium tubular pores; common coarse irregular black (10YR 2/1) soft masses of manganese; few fine rounded black (10YR 2/1) rounded hard manganese nodules; many prominent yellowish red (5YR 4/6) clay films on faces of peds; common coarse prominent dark red (2.5YR 3/6) masses of iron concentration; very strongly acid; gradual wavy boundary.
Bt4--69 to 124 cm (27 to 49 inches); dark red (2.5YR 3/6) clay; strong very coarse prismatic structure parting to strong medium subangular blocky structure; very friable; sticky, plastic; few very fine, fine and medium roots throughout; few very fine and fine tubular pores throughout; few fine rounded black (10YR 2/1) hard manganese nodules; few very coarse irregular black (10YR 2/1) soft masses of manganese; many prominent dark red (2.5YR 3/6) clay films on faces of peds; common extremely coarse rounded yellowish red (5YR 4/6) clay depletions; less than 1 percent gravel; very strongly acid; gradual smooth boundary.
Bt5--124 to 168 cm (49 to 66 inches); dark red (2.5YR 3/6) clay; strong very coarse prismatic structure parting to strong medium subangular blocky; very friable; sticky, plastic; very few very fine, fine and medium roots throughout; few very fine, fine and medium tubular pores throughout; few fine rounded black (10YR 2/1) manganese nodules; many prominent dark red (2.5YR 3/6) clay films on faces of peds; few prominent black (10YR 2/1) manganese coatings on faces of peds; common very coarse rounded yellowish red (5YR 4/6) clay depletions; trace gravel; very strongly acid. (Combined thickness of the Bt horizons is 132 to more than 183 cm.)
TYPE LOCATION: Charles County, Maryland; in a wooded area about 1.5 miles SE of Nanjemoy; 700 feet E of the intersection of Rte. 6 and Rte. 425 (Ironsides Rd.), 500 feet SE of Rte. 425, and 200 feet SSW of power line right-of-way. USGS Nanjemoy topographic quadrangle; 38 degrees 26 minutes 27 seconds N latitude, 77 degrees 11 minutes 33 seconds W longitude.
RANGE IN CHARACTERISTICS:
Depth to the top of the Argillic : 13 to 38 cm (5 to 15 inches)
Depth to the base of the Argillic : greater than 152 cm (60 inches)
Depth to Bedrock: Greater than 203 cm (80 inches)
Depth to Seasonal High Water Table: greater than 203 cm (80 inches), January to December
Rock Fragment content: 0 to 5 percent, by volume, in all horizons
Soil Reaction: extremely acid to strongly acid, except where limed
Other Features: Masses and/or nodules of manganese are present in some or all layers of the argillic horizon in nearly all pedons. The saturated hydraulic conductivity of this soil is more rapid than its texture would indicate.
RANGE OF INDIVIDUAL HORIZONS:
A or Ap horizon(s):
Color--Hue of 2.5YR to 10YR, value of 3 to 5 and chroma of 2 to 6.
Texture--silt loam, loam, fine sandy loam, very fine sandy loam
E or BE horizon (if it occurs):
Color--hue of 2.5YR to 10YR, value of 4 to 6 and chroma of 4 to 8.
Texture--silt loam, loam, fine sandy loam, very fine sandy loam.
Upper Bt horizon(s):
Color--hue of 2.5YR to 10YR, value of 3 to 5 and chroma of 4 to 8.
Texture--loam, silt loam, clay loam or silty clay loam.
Other features--iron masses in shades of red, brown or yellow, and black nodules or stains of manganese may be present.
Lower Bt horizon(s):
Color--hue of 2.5YR or 5YR, value of 3 to 5 and chroma of 4 to 8.
Texture--loam, silt loam, clay loam, silty clay loam or clay.
Other features--black nodules and stains of manganese are present in nearly all pedons. Clay depletions in shades of yellow or brown may be present.
BC horizon (if it occurs) is at depths greater than 152 cm (60 inches):
Color--hue of 2.5YR to 5YR, value of 3 to 5 and chroma of 4 to 8.
Texture--loam, silt loam, clay loam, silty clay loam or clay
Other features--black nodules and stains of manganese are present in nearly all pedons. Clay depletions in shades of yellow or brown may be present.
COMPETING SERIES:
Britwater soils--formed in alluvium derived from cherty limestone or cherty dolomite, on old high stream terraces
Holstein soils--formed in colluvium derived from sandstone, limestone, and shale
Morven soils--formed in colluvium derived from calcareous conglomerate in Triassic basins
Negley soils--formed in glacial outwash on terraces, kames, and eskers
Pomme soils--formed in a thin a mantle of loess or a mixture of loess and colluvium over colluvium or old alluvium
Sonora soils--formed in a silt loam mantle over unconsolidated material of sandstone and shale origin; in karst topography
Walkersville soils--formed in old alluvium derived from mixed sedimentary and metamorphic rocks over limestone residuum
GEOGRAPHIC SETTING:
Landscape: Coastal Plain, upland
Landform: Broad interstream divide, knoll, fluviomarine terrace
Hillslope Profile Position: Summit (broad flat) and shoulder
Geomorphic Component: Interfluves
Parent Material: Loamy and clayey fluviomarine sediments
Slope: 0 to 25 percent
Elevation: 12 to 37 meters (40 to 120 feet)
Frost-free period 180 to 210 days
Mean Annual Air Temperature: 11 to 14 degrees C. (52 to 57 degrees F)
Mean Annual Precipitation: 1016 to 1270 mm (40 to 50 inches)
GEOGRAPHICALLY ASSOCIATED SOILS:
Beltsville soils--have a fragipan
Grosstown soils--have very gravelly or extremely gravelly layers within 40 inches of the surface
Mattapex soils--fine-silty, and have a seasonally fluctuating water table within 20 to 40 inches of the surface
Potobac soils--are poorly drained soils on floodplains
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class (Agricultural): Well Drained
Internal Free Water Occurrence: Very deep
Flooding Frequency and Duration classes: None
Ponding Frequency and Duration classes: None
Index Surface Runoff class: Negligible to moderate
Saturated Hydraulic Conductivity class: Moderately high to high
Permeability class (obsolete): Moderate
Shrink-swell Potential class: Low
USE AND VEGETATION:
Major Uses: Most areas are cleared and used for raising corn, soybeans, small grains, and hay grasses. Some areas are in pines or hardwoods.
Dominant Vegetation: Where cultivated-corn, soybeans, small grains, and hay grasses. Where wooded-Shortleaf pine, mixed oaks, holly, and poison ivy.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: RALEIGH, NORTH CAROLINA
Distribution: Coastal Plain of Southern Maryland, and possibly nearby areas of Virginia.
Extent: Small, but locally important.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Charles County, Maryland, 2007.
REMARKS: A Magnolia soil was previously mapped in both thermic and mesic regions on the coastal plain before the publication of Soil Taxonomy.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from 0 to 13 cm (Ap horizon)
Argillic horizon--the zone from 13 to 168 cm (Bt horizons)
ADDITIONAL DATA: Full characterization data for this pedon, sampled as S00MD017-008, are available from the NSSL. Additional reference particle size data from the University of Maryland Pedology laboratory is available for pedons S99MD-017-002, S00MD-017-006 and S00MD-017-008.
National Cooperative Soil Survey
U.S.A.