IDENTIFIERS

  • Current Taxon Name (Soil Name): Courtois
  • OSD
  • Series Extent
  • User Site ID: 1991MO123012M
  • User Pedon ID: 1991MO123012M
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M9112312
  • NCSS Pedon Lab Data NASIS Record ID - 31397
  • 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: 37.5262489
  • Std. Longitude: -90.3637772
  • Datum: WGS84
  • Township: T33N
  • Range: R6E
  • Section: 22
  • PLSS Details: 300 feet N and 1700 feet W of the SE corner
  • Location Description: 300 ft. N. and 1700 ft. W. of the SE corner of sec. 22, T. 33 N., R. 6 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-E3—Fredericktown, Missouri

    • PEDON

  • Describers Name: MLC and RDC
  • Current Taxonomic Class: Fine, mixed, active, mesic Typic Paleudalfs
  • Current Taxon Kind: series
  • 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 - 3/4/2011
  • 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 - 5/30/1991
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Field Measured Properties: 42 Cation exchange capacity to clay ratio


    • SITE

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

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/30/1991 (actual site observation date)
  • Air Photo ID: C-4
  • 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—170

    —-

    —-
    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

    8

    —

    —

    244

    —

    100

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 10 centimeters (0.0 to 3.9 inches); 50 percent brown (7.5YR 4/3) and 50 percent dark brown (7.5YR 3/3), light brown (7.5YR 6/4), dry; silt loam; weak fine subangular blocky parts to moderate fine granular structure; friable; 10.0 fine roots; 13 percent by volume rounded 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.4, hellige-truog; clear wavy boundary. Lab sample # MU041912. Some mixing from AB layer.
    AB—10 to 18 centimeters (3.9 to 7.1 inches); 50 percent brown (7.5YR 4/4) and 50 percent dark brown (7.5YR 3/4), strong brown (7.5YR 5/6), dry; silt loam; weak fine subangular blocky parts to moderate very fine granular structure; friable; 10.0 fine to coarse roots; 8 percent by volume 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.1, hellige-truog; abrupt wavy boundary. Lab sample # MU041913. Some mixing from Ap layer.
    Bt1—18 to 30 centimeters (7.1 to 11.8 inches); 50 percent strong brown (7.5YR 4/6) and 50 percent yellowish red (5YR 4/6) silty clay loam; moderate fine subangular blocky, and weak very fine subangular blocky structure; friable; 5.0 fine to coarse roots; 75 percent distinct clay films on faces of peds; 2 percent by volume 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.1, hellige-truog; clear wavy boundary. Lab sample # MU041914
    2Bt2—30 to 43 centimeters (11.8 to 16.9 inches); yellowish red (5YR 4/6) silty clay; moderate very fine and fine subangular blocky structure; friable; 5.0 fine to coarse roots; 15 percent manganese or iron-manganese stains and 75 percent distinct clay films on faces of peds; 4 percent by volume 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.2, hellige-truog; clear wavy boundary. Lab sample # MU041915
    2Bt3—43 to 58 centimeters (16.9 to 22.8 inches); yellowish red (5YR 4/6) very gravelly clay; moderate very fine and fine subangular blocky structure; firm; 0.5 medium roots; 75 percent prominent clay films on faces of peds; 1 percent iron-manganese masses; 2 percent by volume 75-162-250 millimeter unspecified fragments and 36 percent by volume 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.1, hellige-truog; abrupt wavy boundary. Lab sample # MU041916. Gravel may represent slope colluvium over a lag deposit of cobbles.
    3Bt4—58 to 81 centimeters (22.8 to 31.9 inches); 60 percent strong brown (7.5YR 5/6) and 40 percent red (2.5YR 4/6) clay; moderate very fine and fine subangular blocky structure; firm; 0.5 medium roots; 75 percent prominent clay films on faces of peds; 3 percent by volume 2-39-75 millimeter unspecified fragments; very strongly acid, pH 5.0, hellige-truog; clear wavy boundary. Lab sample # MU041917
    3Bt5—81 to 114 centimeters (31.9 to 44.9 inches); 60 percent strong brown (7.5YR 5/6) and 40 percent yellowish brown (10YR 5/8) clay; 1 percent pale brown (10YR 6/3) fine prominent and 10 percent red (2.5YR 4/6) fine prominent mottles; moderate very fine subangular blocky structure; firm; 0.5 fine roots; 35 percent manganese or iron-manganese stains and 75 percent distinct clay films on faces of peds; 1 percent by volume subangular 2-39-75 millimeter unspecified fragments; strongly acid, pH 5.2, hellige-truog; gradual wavy boundary. Lab sample # MU041918. The upper two inches was banded red and yellowish brown.
    3Bt6—114 to 137 centimeters (44.9 to 53.9 inches); strong brown (7.5YR 5/6) clay; 25 percent yellowish brown (10YR 5/8) fine and medium distinct mottles; moderate very fine and fine subangular blocky structure; firm; 0.5 fine roots; 26 percent nonintersecting slickensides on faces of peds and 35 percent manganese or iron-manganese stains and 75 percent distinct clay films on faces of peds; fragments; neutral, pH 7.2, hellige-truog; gradual wavy boundary. Lab sample # MU041919
    3Bt7—137 to 170 centimeters (53.9 to 66.9 inches); red (2.5YR 4/6) clay; 10 percent yellowish brown (10YR 5/6) medium prominent mottles; moderate medium and coarse subangular blocky, and strong very fine subangular blocky structure; firm; 0.5 very fine roots; 35 percent prominent manganese or iron-manganese stains on faces of peds and 35 percent prominent clay films on vertical faces of peds and 40 percent nonintersecting slickensides on faces of peds; fragments; slightly alkaline, pH 7.6, hellige-truog. Lab sample # MU041920