IDENTIFIERS

  • Current Taxon Name (Soil Name): Courtois
  • OSD
  • Series Extent
  • User Site ID: 1990MO123017M
  • User Pedon ID: 1990MO123017M
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M9012317
  • NCSS Pedon Lab Data NASIS Record ID - 27074
  • Print Date: 11/21/2024

    • 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: 37.3796959
  • Std. Longitude: -90.4566956
  • Datum: WGS84
  • Township: T31N
  • Range: R5E
  • Section: 12
  • PLSS Details: 3650 feet S and 80 feet E of the NW corner
  • Location Description: 3650 ft. S. and 80 ft. E. of the NW corner of sec.12, T. 31 N., R. 5 E .
  • Map Unit: 18C—Courtois silt loam, 3 to 9 percent slopes73143—Courtois silt loam, 3 to 8 percent slopes
  • State: Missouri
  • County: MO123—Madison
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO123—Madison County, Missouri
  • 7.5 Minute USGS Quad: 37090-D4—Rock Pile Mountain, Missouri

    • PEDON

  • Describers Name: KEB, RDC, ERB, BLB, MLC
  • Current Taxonomic Class: Fine, mixed, semiactive, mesic Oxyaquic Paleudalfs
  • Current Taxon Kind: taxadjunct
  • Pedon Type: within range of map unit
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Courtois
  • PSC - 18 to 68 cm.
  • Classificaton Date - 12/10/2010
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Courtois
  • Taxonomic Class - Fine, mixed, active, mesic Typic Paleudalfs
  • Taxon Kind - series
  • PSC - 18 to 68 cm.
  • Classificaton Date - 10/24/1990
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Field Measured Properties: 38 Cation exchange capacity to clay ratio


    • SITE

  • Parent Material: loess over residuum
  • Landscape: plateau
  • Landform: structural bench
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/24/1990 (actual site observation date)
  • Air Photo ID: B-7
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    0—18

    18—152

    —-

    —-
    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

    7

    —

    —

    168

    —

    130

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 18 centimeters (0.0 to 7.1 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; silt loam; weak fine subangular blocky structure; friable; 10.0 very fine and fine roots; 15 percent by volume 2-39-75 millimeter unspecified fragments; neutral, pH 7.0, hellige-truog; abrupt smooth boundary. Lab sample # MU014017. Strong brown (7.5YR 4/6 pockets of Bt1 mixed with this horizon. Compaction plates in this horizon.
    Bt1—18 to 38 centimeters (7.1 to 15.0 inches); yellowish red (5YR 5/8) silty clay loam; moderate very fine and fine subangular blocky structure; firm; 3.0 very fine and fine roots; 15 percent prominent silt coats and 35 percent distinct clay films; 2 percent by volume 2-39-75 millimeter unspecified fragments; moderately acid, pH 5.7, hellige-truog; clear wavy boundary. Lab sample # MU014018. discontinuous - phpvsfiid 162019; discontinuous - phpvsfiid 162020; discontinuous - phpvsfiid 162019; discontinuous - phpvsfiid 162020
    Bt2—38 to 64 centimeters (15.0 to 25.2 inches); yellowish red (5YR 5/8) silty clay; 10 percent dark red (2.5YR 3/6) fine and medium prominent mottles; moderate very fine and fine subangular blocky structure; firm; 3.0 very fine and fine roots; 15 percent prominent silt coats and 35 percent prominent clay films; 2 percent by volume 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.1, hellige-truog; clear wavy boundary. Lab sample # MU014019. Clay films grade to many with depth.; discontinuous - phpvsfiid 162021; discontinuous - phpvsfiid 162022; discontinuous - phpvsfiid 162021; discontinuous - phpvsfiid 162022
    2Bt3—64 to 81 centimeters (25.2 to 31.9 inches); brown (7.5YR 5/4) clay; 30 percent dark red (2.5YR 3/6) coarse prominent mottles; moderate very fine and fine subangular blocky structure; firm; 3.0 very fine and fine roots; 15 percent prominent silt coats and 75 percent prominent clay films; 2 percent by volume 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.1, hellige-truog; clear wavy boundary. Lab sample # MU014020. discontinuous - phpvsfiid 162023; discontinuous - phpvsfiid 162024; discontinuous - phpvsfiid 162023; discontinuous - phpvsfiid 162024
    2Bt4—81 to 104 centimeters (31.9 to 40.9 inches); dark red (2.5YR 3/6) gravelly clay; 10 percent strong brown (7.5YR 5/6) coarse prominent mottles; moderate very fine and fine subangular blocky structure; firm; 0.5 very fine and fine roots; 75 percent prominent clay films on vertical faces of peds; 25 percent by volume 2-39-75 millimeter unspecified fragments; very strongly acid, pH 4.7, hellige-truog; clear wavy boundary. Lab sample # MU014021. discontinuous - phpvsfiid 162025; discontinuous - phpvsfiid 162025
    2Bt5—104 to 140 centimeters (40.9 to 55.1 inches); dark red (2.5YR 3/6) clay; 10 percent strong brown (7.5YR 5/6) coarse prominent mottles; moderate very fine and fine subangular blocky structure; very firm; 0.5 very fine and fine roots; 35 percent prominent clay films on all faces of peds; 5 percent by volume 2-39-75 millimeter unspecified fragments; very strongly acid, pH 4.9, hellige-truog; gradual wavy boundary. Lab sample # MU014022. discontinuous - phpvsfiid 162026; discontinuous - phpvsfiid 162026
    2Bt6—140 to 152 centimeters (55.1 to 59.8 inches); dark red (2.5YR 3/6) clay; 10 percent strong brown (7.5YR 5/6) coarse prominent mottles; moderate very fine and fine subangular blocky structure; very firm; 75 percent prominent clay films on all faces of peds; 1 percent by volume 2-39-75 millimeter unspecified fragments; very strongly acid, pH 4.9, hellige-truog. Lab sample # MU014023. discontinuous - phpvsfiid 162027; discontinuous - phpvsfiid 162027