IDENTIFIERS

  • Current Taxon Name (Soil Name): Aquasco
  • OSD
  • Series Extent
  • User Site ID: S2001MD017011
  • User Pedon ID: S2001MD017011
  • User Site Association ID: Charles County, Maryland Taxonomic Unit Descriptions 2003
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 01N0969
  • NCSS Pedon Lab Data NASIS Record ID - 14411
  • Print Date: 5/20/2024

    • LOCATION

  • Location In Web Soil Survey
  • AOI is roughly a square mile and pedon is marked in the center.
  • Location in SoilWeb
  • Location in Google Maps
  • Std. Latitude: 38.6222583
  • Std. Longitude: -76.9769250
  • Datum: WGS84
  • Location Description: Typical pedon of Aquasco silt loam, on a 1 percent slope in a wooded area, about 3.0 miles NW of St. Charles Town Center, 8000 feet NW of the intersection of US Route 301 and Fort Smallwood Drive; about 5800 feet NW of the intersection of Miffletown Rd. and Billingsley Rd.; about 1800 feet SW of Mill Hill Rd. USGS La Plata, MD topographic quadrangle
  • Map Unit: Le—Leonardtown silt loam112A—Beltsville-Aquasco complex, 0 to 2 percent slopes
  • Country: US—United States
  • State: Maryland
  • County: MD017—Charles
  • MLRA: 149A—Northern Coastal Plain
  • Regional Office: SE—Southeast
  • MLRA Soil Survey Area: NE-HAM—Hammonton, New Jersey
  • Non-MLRA Soil Survey Area: MD017—Charles County, Maryland
  • 7.5 Minute USGS Quad: 38076-E8—La Plata, Maryland

    • PEDON

  • Describers Name: Eddie Earles, David Verdone
  • Current Taxonomic Class: Fine-silty, mixed, semiactive, mesic Aquic Fragiudults
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Windows Pedon
  • Pedon #: 11
  • Correlated Information:
  • Soil Name - Aquasco (flagged as OSD)
  • PSC - 25 to 51 cm.
  • Classificaton Date - 2/18/2009
  • Classifier - David Verdone
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - udic
  • Moisture Subclass - aquic
  • Sampled As Information:
  • Soil Name - Aquasco
  • Taxonomic Class - Fine-silty, mixed, semiactive, mesic Aquic Fragiudults
  • Taxon Kind - series
  • PSC - 25 to 51 cm.
  • Classificaton Date - 7/25/2001
  • Classifier - Eddie Earles
  • Soil Taxonomic Edition - eighth edition
  • Moisture Class - udic
  • Moisture SUBClass - aquic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: loamy fluviomarine deposits
  • Landscape: Coastal Plain upland
  • Landform: broad interstream divide
  • Geomorphic Component Flats: talf
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: high
  • Drainage Class: somewhat poorly
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Upland Gravel formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/25/2001 (actual site observation date)
  • Data Collector: Eddie Earles, David Verdone
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - intermixed conifers and hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    fragipan

    noncoherent

    51 - 112

    - 61 -

    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    aquic conditions

    redox concentrations

    redox depletions with chroma 2 or less

    argillic horizon

    fragipan

    0—25

    8—183

    8—183

    8—183

    25—183

    51—112

    —25—

    —175—

    —175—

    —175—

    —158—

    —61—
    Setting and Climate
    Slope Slope Length USLE Upslope Length Elev. Corr. Elev Aspect MAP REAP FFD MAAT MSAT MWAT MAST MSST MWST MFFP PE Index Climate Station ID Climate Station Name Climate Station Type
    % m degrees mm mm C mm

    1

    —

    —

    66

    —

    1076

    —

    —

    13

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Oi—0 to 3 centimeters (0.0 to 1.2 inches); very dark gray (5YR 3/1), dark reddish brown (5YR 3/2), dry; slightly decomposed plant material; low excavation difficulty; 4.0 very coarse roots and 3.0 medium roots and 3.0 fine roots and 6.0 coarse roots; fragments; abrupt smooth boundary.; observed in trench
    A—3 to 8 centimeters (1.2 to 3.1 inches); black (2.5Y 2.5/1), dark gray (2.5Y 4/1), dry; silt loam; moderate medium subangular blocky structure; soft, very friable, slightly sticky, nonplastic; low excavation difficulty; common (2.0) very coarse roots throughout and many (4.0) medium roots throughout and common (3.0) fine roots throughout and common (6.0) coarse roots throughout; fragments; clear smooth boundary.; observed in trench
    E—8 to 25 centimeters (3.1 to 9.8 inches); light yellowish brown (2.5Y 6/4), pale yellow (2.5Y 7/4), dry; silt loam; weak coarse subangular blocky structure; soft, very friable by iron, slightly sticky, nonplastic; low excavation difficulty; common very fine roots throughout and common (3.0) very coarse roots throughout and many (0.5) medium roots throughout and common (0.5) fine roots throughout; 1 percent coarse distinct spherical gray (10YR 5/1), moist, iron depletions throughout; 1 percent by volume nonflat rounded very strongly coherent cemented 10-50-75 millimeter quartzite fragments observed by visual inspection method; gradual smooth boundary.; observed in trench
    Bt1—25 to 36 centimeters (9.8 to 14.2 inches); light olive brown (2.5Y 5/4) silt loam; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; low excavation difficulty; few (0.5) medium roots throughout and few (0.5) fine roots throughout and common coarse roots throughout; threadlike reddish yellow (7.5YR 6/6), moist, masses of oxidized iron and 15 percent coarse distinct irregular gray (10YR 5/1), moist, iron depletions; fragments; clear wavy boundary.; observed in trench
    Bt2—36 to 51 centimeters (14.2 to 20.1 inches); 40 percent light olive brown (2.5Y 5/4) silty clay loam; strong fine subangular blocky parts to moderate medium platy structure; slightly hard, friable, slightly sticky, moderately plastic; low excavation difficulty; 0.5 very fine roots throughout and 0.5 medium roots throughout and 0.5 fine roots throughout; few (1.0) medium tubular pores; 10 percent gray (10YR 5/1), moist, clay films and 40 percent prominent light olive brown (2.5Y 5/4), moist, clay films on all faces of peds; 30 percent medium prominent reddish yellow (7.5YR 6/8), moist, masses of oxidized iron in matrix and 30 percent coarse prominent irregular gray (10YR 5/1), moist, iron depletions and 30 percent coarse prominent reddish yellow (7.5YR 6/8), moist, masses of oxidized iron in matrix; fragments; clear wavy boundary.; observed in trench. discontinuous - phpvsfiid 364720; discontinuous - phpvsfiid 364720
    Btx1—51 to 74 centimeters (20.1 to 29.1 inches); light olive brown (2.5Y 5/4) silt loam; moderate very coarse prismatic parts to strong fine angular blocky, and moderate very coarse prismatic parts to strong fine platy structure; moderately hard, friable, moderately sticky, slightly plastic; brittle; moderate excavation difficulty; few (0.5) very fine roots between peds and few (0.5) medium roots between peds and few (0.5) fine roots between peds; common (1.0) very fine tubular and common (1.0) very fine vesicular and common (1.0) medium tubular and common (1.0) medium vesicular and common (1.0) fine tubular and common (1.0) fine vesicular pores; 40 percent prominent yellowish brown (10YR 5/4), moist, clay films on surfaces along pores; 4 percent fine spherical black (5YR 2/1), moist, iron-manganese nodules and 4 percent medium spherical black (5YR 2/1), moist, iron-manganese nodules and 10 percent coarse distinct light gray (2.5Y 7/1), moist, clay depletions on vertical faces of peds and 10 percent coarse prominent reddish yellow (7.5YR 6/8), moist, masses of oxidized iron on vertical faces of peds and 10 percent coarse distinct grayish brown (10YR 5/2), moist, iron depletions and 10 percent medium distinct grayish brown (10YR 5/2), moist, iron depletions; fragments; gradual wavy boundary.; observed in trench. discontinuous - phpvsfiid 364721; discontinuous - phpvsfiid 364721
    Btx2—74 to 89 centimeters (29.1 to 35.0 inches); light olive brown (2.5Y 5/6) loam; moderate very coarse prismatic parts to strong very fine platy structure; hard, firm, moderately sticky, slightly plastic; brittle; high excavation difficulty; few (0.5) fine roots between peds; common (1.0) very fine tubular and common (1.0) very coarse vesicular and common (1.0) medium tubular and common (1.0) medium vesicular and common (1.0) fine vesicular and common (1.0) fine tubular pores; 60 percent prominent dark yellowish brown (10YR 4/6), moist, clay films on all faces of peds; 4 percent fine prominent black (5Y 2/1), moist, iron-manganese nodules and 10 percent light gray (2.5Y 7/1), moist, clay depletions on vertical faces of peds and 10 percent reddish yellow (7.5YR 6/8), moist, masses of oxidized iron on vertical faces of peds and 10 percent grayish brown (10YR 5/2), moist, iron depletions on faces of peds; fragments; gradual wavy boundary.; observed in trench. discontinuous - phpvsfiid 364722; discontinuous - phpvsfiid 364722
    Btx3—89 to 112 centimeters (35.0 to 44.1 inches); yellowish brown (10YR 5/6) clay loam; moderate medium subangular blocky parts to strong fine platy structure; moderately hard, moderately sticky, moderately plastic; brittle; high excavation difficulty; few fine roots between peds; common (1.0) very fine vesicular and common (1.0) very fine tubular and common (1.0) medium vesicular and common (1.0) medium tubular and common (1.0) fine tubular and common (1.0) fine vesicular pores; 60 percent prominent dark yellowish brown (10YR 4/6), moist, clay films on all faces of peds; 15 percent coarse distinct irregular yellowish red (5YR 4/6), moist, and reddish yellow (7.5YR 6/8), moist, masses of oxidized iron on vertical faces of peds and 15 percent coarse prominent irregular light gray (N 7/), moist, iron depletions on vertical faces of peds; fragments; clear wavy boundary.; observed in trench
    BCt—112 to 183 centimeters (44.1 to 72.0 inches); clay loam; moderate medium subangular blocky, and moderate coarse subangular blocky structure; friable, moderately sticky, moderately plastic; low excavation difficulty; many (2.0) coarse vesicular pores; 50 percent prominent light gray (N 7/), moist, and light red (2.5YR 6/8), moist, and yellowish brown (10YR 5/8), moist, clay films on all faces of peds; 30 percent coarse prominent light gray (N 7/), moist, iron depletions in matrix and 30 percent coarse prominent light red (2.5YR 6/8), moist, masses of oxidized iron in matrix; fragments.; observed in trench. patchy - phpvsfiid 364723; patchy - phpvsfiid 364723