IDENTIFIERS

  • Current Taxon Name (Soil Name): Donlonton
  • OSD
  • Series Extent
  • User Site ID: S2004MD033044
  • User Pedon ID: S2004MD033044
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 05N0345
  • NCSS Pedon Lab Data NASIS Record ID - 18320
  • Print Date: 12/4/2024

    • 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: 38.8614731
  • Std. Longitude: -76.8222504
  • Datum: WGS84
  • Map Unit: DnB—Donlonton fine sandy loam, 2 to 5 percent slopes
  • State: Maryland
  • County: MD033—Prince George's
  • MLRA: 149A—Northern Coastal Plain
  • Regional Office: 6—Morgantown, WV
  • Non-MLRA Soil Survey Area: MD033—Prince George's County, Maryland
  • 7.5 Minute USGS Quad: 38076-G7—Upper Marlboro, Maryland

    • PEDON

  • Describers Name: Edward H. Earles, Susan L. Davis, David R. P. Verdone, Valerie Cohen
  • Current Taxonomic Class: Fine-loamy, mixed, active, mesic Aquic Hapludults
  • Current Taxon Kind: taxadjunct
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 44
  • Correlated Information:
  • Soil Name - Donlonton
  • PSC - 23 to 74 cm.
  • Classificaton Date - 2/4/2013
  • Classifier - Susan Demas
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - udic
  • Moisture Subclass - aquic
  • Sampled As Information:
  • Soil Name - Donlonton
  • Classificaton Date - 10/20/2004
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1


    • SITE

  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Drainage Class: moderately well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Aquia formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/20/2004 (actual site observation date)
  • Air Photo ID: AS 26
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    aquic conditions

    0—23

    23—76

    58—185

    —-

    —-

    —-
    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

    1.5

    —

    —

    —

    —

    1076

    —

    —

    13

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap1—0 to 5 centimeters (0.0 to 2.0 inches); very dark grayish brown (2.5Y 3/2), light olive brown (2.5Y 5/3), dry; fine sandy loam; 11 percent clay; weak fine granular, and weak fine subangular blocky structure; very friable, nonsticky, slightly plastic; 0.1 very fine roots throughout and 0.1 medium roots throughout and 0.1 fine roots throughout; 0.1 very fine tubular and 0.1 fine tubular pores; 4 percent by volume nonflat well rounded quartzite fragments; slightly alkaline, pH 7.5, hellige-truog. Lab sample # 05N01955; moist when described; observed in trench. 15 percent glauconite pellets visible in horizon.
    Ap2—5 to 23 centimeters (2.0 to 9.1 inches); dark brown (10YR 3/3) fine sandy loam; 11 percent clay; weak medium subangular blocky structure; very friable, nonsticky, slightly plastic; 0.1 very fine roots throughout and 0.1 medium roots throughout and 0.1 fine roots throughout; 0.1 medium tubular and 0.1 fine tubular pores; 1 percent fine dark reddish brown (2.5YR 2.5/3), moist, masses of oxidized iron throughout; 7 percent by volume nonflat well rounded quartzite fragments; neutral, pH 7.0, hellige-truog. Lab sample # 05N01955; moist when described; observed in trench. 15 percent glauconite pellets visible in horizon
    Bt1—23 to 33 centimeters (9.1 to 13.0 inches); 10 percent brown (10YR 5/3) and dark yellowish brown (10YR 4/4) sandy clay loam; 21 percent clay; weak coarse subangular blocky, and weak medium subangular blocky structure; friable, slightly sticky, moderately plastic; 0.1 very fine roots throughout; 0.1 medium tubular and 0.1 fine tubular pores; 5 percent faint dark yellowish brown (10YR 4/4), moist, clay films on all faces of peds and 60 percent distinct dark yellowish brown (10YR 4/4), moist, clay bridges between sand grains; 2 percent medium dark reddish brown (2.5YR 2.5/3), moist, masses of oxidized iron; 1 percent by volume nonflat subangular quartzite fragments; strongly acid, pH 5.5, hellige-truog. Lab sample # 05N01956; moist when described; observed in trench
    Bt2—33 to 58 centimeters (13.0 to 22.8 inches); dark yellowish brown (10YR 4/4) sandy clay loam; 23 percent clay; weak coarse subangular blocky, and weak medium subangular blocky structure; friable, slightly sticky, moderately plastic; 0.1 very fine roots throughout; 0.1 medium tubular and 0.1 fine tubular pores; 10 percent distinct dark yellowish brown (10YR 4/4), moist, clay films on all faces of peds and 85 percent distinct clay bridges between sand grains; 2 percent medium dark reddish brown (2.5YR 2.5/3), moist, masses of oxidized iron; 1 percent by volume nonflat well rounded quartzite fragments and 1 percent by volume nonflat subangular quartzite fragments; very strongly acid, pH 5.0, hellige-truog. Lab sample # 05N01957; moist when described; observed in trench. 23 percent glauconite pellets visible in horizon
    Bt3—58 to 76 centimeters (22.8 to 29.9 inches); 45 percent dark yellowish brown (10YR 3/4) and 45 percent olive brown (2.5Y 4/3) sandy clay loam; 18 percent clay; weak coarse prismatic parts to weak coarse subangular blocky structure; friable, slightly sticky, moderately plastic; 0.1 very fine roots throughout and 0.1 fine roots throughout; 0.1 medium tubular and 0.1 fine tubular pores; 15 percent faint dark yellowish brown (10YR 4/4), moist, on all faces of peds and 80 percent distinct on rock fragments; 2 percent medium reddish brown (5YR 4/4) masses of oxidized iron and 3 percent coarse dark reddish brown (2.5YR 3/4) masses of oxidized iron and 5 percent medium dark olive gray (5Y 3/2), moist, masses of reduced iron; 5 percent by volume nonflat rounded quartzite fragments; very strongly acid, pH 5.0, hellige-truog. Lab sample # 05N01958; moist when described; observed in trench. About 40 percent glauconite pellets visible in horizon; 1 percent 10YR 2/1 organic stains, 2mm dia, from decomposing roots.
    BCg—76 to 104 centimeters (29.9 to 40.9 inches); dark olive gray (5Y 3/2) and olive brown (2.5Y 4/3) loamy fine sand; 12 percent clay; massive; very friable, nonsticky, nonplastic; 0.1 medium roots throughout and 0.1 fine roots throughout and 0.1 coarse roots throughout; 3 percent coarse olive gray (5Y 4/2), moist, masses of reduced iron and 3 percent coarse reddish brown (5YR 4/4), moist, masses of oxidized iron in matrix surrounding redox depletions; fragments; very strongly acid, pH 5.0, hellige-truog. Lab sample # 05N01959; very moist when described; observed in trench. 45 percent glauconite pellets visible in horizon. There is a stone line from 23 to 25 inches, which contains 25 percent gravels. The top of the horizon is 2.5Y 4/3 color, and the lower portion is 5Y 3/2.
    CBg—104 to 145 centimeters (40.9 to 57.1 inches); dark olive gray (5Y 3/2) fine sand; 2 percent medium dark greenish gray (10Y 4/1), moist, masses of reduced iron and 3 percent coarse yellowish brown (10YR 5/6), moist, masses of oxidized iron; fragments. Lab sample # 05N01960; wet when described; observed in auger, bucket. 45 percent glauconite pellets visible.
    CBjg—145 to 170 centimeters (57.1 to 66.9 inches); fine sandy loam; 20 percent coarse dark yellowish brown (10YR 4/4) masses of oxidized iron; fragments. Lab sample # 05N01961; wet when described; observed in auger, bucket
    BC'g2—170 to 185 centimeters (66.9 to 72.8 inches); dark olive gray (5Y 3/2) sandy clay loam; 5 percent coarse dark reddish brown (5YR 3/4), moist, masses of oxidized iron and 40 percent very coarse strong brown (7.5YR 4/6), moist, masses of oxidized iron; fragments. Lab sample # 05N01962; wet when described; observed in auger, bucket