IDENTIFIERS

  • Current Taxon Name (Soil Name): DARWIN
  • OSD
  • Series Extent
  • User Site ID: 2007MO183021
  • User Pedon ID: 2007MO183021
  • Vegetation Plot ID: 2007MO183021
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M0718321
  • NCSS Pedon Lab Data NASIS Record ID - 26114
  • Print Date: 2/17/2025

    • 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: 38.5861667
  • Std. Longitude: -90.7973611
  • Datum: WGS84
  • PLSS Details: 482 feet West and 1,040 feet South from the North East corner of Survey 1246,
  • Country: US—United States
  • State: Missouri
  • County: MO183—St. Charles
  • MLRA: 115—Central Mississippi Valley Wooded Slopes
  • Non-MLRA Soil Survey Area: MO183—St. Charles County, Missouri
  • 7.5 Minute USGS Quad: 38090-E7—Labadie, Missouri

    • PEDON

  • Describers Name: Keith Knelle, Dennis Meinert
  • Current Taxonomic Class: Fine, mixed, mesic Cumulic Vertic Endoaquolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: map unit inclusion
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 21
  • Correlated Information:
  • Soil Name - DARWIN
  • PSC - 25 to 102 cm.
  • Classificaton Date - 2/1/2012
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - aquic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - SND
  • Classificaton Date - 4/10/2007
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Holocene Stage clayey alluvium derived from mixed
  • Landscape: river valley
  • Landform: slough
  • Geomorphic Component Hills: interfluve
  • Slope Complexity: simple
  • Slope Shape Across: concave
  • Slope Shape Down: linear
  • Runoff: negligible
  • Drainage Class: poorly
  • Flooding: frequent flooding for long periods
  • Ponding: none ponding
  • Geology: Holocene Stage formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/10/2007 (actual site observation date)
  • Air Photo ID: 38090e7ne
  • Surface Water Kind: flooded
  • Surface Water Depth: 15
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - other tree cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion gully
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    SALIX

    ACNE2

    POPUL

    Salix

    Acer negundo

    Populus

    willow

    boxelder

    cottonwood

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

    ochric epipedon

    aquic conditions

    0—5

    25—211

    —5—

    —186—
    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

    0.8

    —

    —

    141.1

    —

    180

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    A—0 to 5 centimeters (0.0 to 2.0 inches); 90 percent very dark gray (10YR 3/1) broken face and 10 percent dark grayish brown (10YR 4/2) broken face silty clay loam; moderate fine subangular blocky, and moderate fine granular structure; friable; 10.0 very fine roots throughout and 10.0 fine roots throughout; 10.0 medium interstitial and 10.0 fine interstitial pores; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; abrupt smooth boundary. Lab sample # MU007211; observed in push tube
    C1—5 to 25 centimeters (2.0 to 9.8 inches); 70 percent dark gray (10YR 4/1) broken face and 20 percent brown (10YR 5/3) broken face and 10 percent very dark grayish brown (10YR 3/2) broken face stratified silt loam; massive; friable; 3.0 very fine roots throughout and 3.0 fine roots throughout; 3.0 medium interstitial and 3.0 fine interstitial and 0.5 coarse tubular pores; 1 percent medium faint irregular noncoherent cemented dark reddish brown (2.5YR 3/4), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; clear smooth boundary.; observed in push tube
    2Bg1—25 to 41 centimeters (9.8 to 16.1 inches); 90 percent very dark gray (10YR 3/1) broken face and 10 percent grayish brown (10YR 5/2) broken face, gray (10YR 5/1) broken face, dry; silty clay loam; moderate fine and medium angular blocky structure; firm; 0.5 fine roots throughout; 3.0 medium tubular and 3.0 fine tubular and 3.0 coarse tubular pores; 1 percent medium faint irregular noncoherent cemented dark reddish brown (2.5YR 3/4), moist, iron depletions with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # MU007213; observed in push tube
    2Bg2—41 to 66 centimeters (16.1 to 26.0 inches); very dark gray (10YR 3/1) broken face, gray (10YR 5/1) broken face, dry; silty clay; moderate medium angular blocky, and moderate medium prismatic structure; firm; 0.5 fine roots throughout; 3.0 medium tubular and 3.0 fine tubular pores; 1 percent medium faint irregular noncoherent cemented dark red (2.5YR 3/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented dark brown (7.5YR 3/4), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented black (7.5YR 2.5/1), moist, iron depletions with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # MU007214; observed in push tube
    2Bg3—66 to 94 centimeters (26.0 to 37.0 inches); 60 percent very dark gray (10YR 3/1) broken face and 40 percent very dark grayish brown (2.5Y 3/2) broken face, grayish brown (10YR 5/2) broken face, dry; silty clay; moderate fine and medium angular blocky structure; firm; 0.5 fine roots throughout; 10.0 medium tubular and 10.0 fine tubular pores; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented dark brown (7.5YR 3/4), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented dark reddish brown (5YR 3/4), moist, iron depletions with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; abrupt smooth boundary. Lab sample # MU007215; observed in push tube
    2Cg1—94 to 114 centimeters (37.0 to 44.9 inches); 50 percent very dark grayish brown (2.5Y 3/2) broken face and 40 percent grayish brown (10YR 5/2) broken face and 10 percent dark gray (10YR 4/1) broken face stratified silt loam; massive; firm; 0.5 fine roots throughout; 3.0 medium tubular and 3.0 coarse tubular pores; 1 percent medium faint irregular noncoherent cemented dark red (2.5YR 3/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented dark yellowish brown (10YR 4/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # MU007216; observed in push tube
    2Cg2—114 to 137 centimeters (44.9 to 53.9 inches); 60 percent very dark grayish brown (2.5Y 3/2) broken face and 30 percent grayish brown (10YR 5/2) broken face and 10 percent dark grayish brown (10YR 4/2) broken face stratified silty clay loam; massive; firm; 0.5 fine roots throughout; 3.0 medium tubular and 3.0 coarse tubular pores; 1 percent medium faint irregular noncoherent cemented dark red (2.5YR 3/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented black (10YR 2/1), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix; fragments; abrupt smooth boundary. Lab sample # MU007217; observed in push tube
    2Cg3—137 to 165 centimeters (53.9 to 65.0 inches); 70 percent dark grayish brown (10YR 4/2) broken face and 30 percent dark gray (2.5Y 4/1) broken face stratified silty clay loam; massive; firm; 0.5 fine roots throughout; 3.0 medium tubular and 3.0 fine tubular pores; 1 percent medium faint irregular noncoherent cemented dark brown (7.5YR 3/4), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; abrupt smooth boundary. Lab sample # MU007218; observed in push tube
    3Bg4—165 to 211 centimeters (65.0 to 83.1 inches); 80 percent very dark gray (2.5Y 3/1) broken face and 10 percent dark grayish brown (10YR 4/2) broken face and 10 percent grayish brown (10YR 5/2) broken face stratified silty clay loam; moderate fine and medium subangular blocky, and moderate fine and medium angular blocky structure; firm; 0.5 fine roots throughout; 10.0 medium tubular and 10.0 fine tubular pores; 1 percent medium faint irregular noncoherent cemented dark yellowish brown (10YR 3/4), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented dark brown (7.5YR 3/3), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n. Lab sample # MU007219; observed in push tube