IDENTIFIERS

  • Current Taxon Name (Soil Name): MEXICO
  • OSD
  • Series Extent
  • User Site ID: 2005MO183001
  • User Pedon ID: 2005MO183001
  • Vegetation Plot ID: 2005MO183001
  • Transect:
  • User Transect ID - MexPut-13
  • Transect Stop Number - 7
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M0518301
  • NCSS Pedon Lab Data NASIS Record ID - 25829
  • 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: 38.7086111
  • Std. Longitude: -90.7495556
  • Datum: WGS84
  • Township: T46N
  • Range: R2E
  • Section: 25
  • PLSS Details: 2,060 feet West and 808 feet North from the South East corner
  • Location Description: Busch Wildlife Conservation Area
  • 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-F6—Weldon Spring, Missouri

    • PEDON

  • Describers Name: Grant Butler
  • Current Taxonomic Class: Fine, smectitic, mesic Vertic Epiaqualfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - MEXICO
  • PSC - 23 to 74 cm.
  • Classificaton Date - 1/31/2012
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - aquic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - MEXICO
  • Classificaton Date - 11/16/2005
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Holocene Stage silty and clayey loess derived from mixed over Holocene Stage silty and clayey pedisediment derived from igneous, metamorphic and sedimentary rock
  • Landscape: till plain
  • Landform: ridge
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Position: lower third
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: very high
  • Drainage Class: poorly
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Holocene Stage formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/16/2005 (actual site observation date)
  • Air Photo ID: 38090f6nw
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion sheet
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    ANGE

    SCSC

    SONU2

    Andropogon gerardii

    Schizachyrium scoparium

    Sorghastrum nutans

    big bluestem

    little bluestem

    Indiangrass

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

    ochric epipedon

    aquic conditions

    argillic horizon

    reduced matrix

    lithologic discontinuity

    0—23

    0—203

    23—203

    23—203

    117—

    —23—

    —203—

    —180—

    —180—

    —1—
    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

    2

    —

    —

    188.7

    —

    180

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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    —

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    Ap—0 to 23 centimeters (0.0 to 9.1 inches); very dark grayish brown (10YR 3/2) broken face, grayish brown (10YR 5/2) broken face, dry; silt loam; moderate very fine and fine subangular blocky structure; very friable; 10.0 very fine roots throughout and 10.0 coarse roots throughout; 10.0 very fine tubular pores; 1 percent medium faint irregular noncoherent cemented black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments; clear wavy boundary.; observed in pit, small
    Btg1—23 to 33 centimeters (9.1 to 13.0 inches); 70 percent dark grayish brown (10YR 4/2) broken face and 30 percent brown (10YR 4/3) broken face silt loam; moderate fine and medium subangular blocky structure; very friable; 10.0 very fine roots throughout and 10.0 coarse roots throughout; 10.0 very fine tubular and 0.5 fine tubular pores; 3 percent faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent medium faint irregular noncoherent cemented yellowish brown (10YR 5/6), 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; clear wavy boundary.; observed in pit, small
    Btg2—33 to 56 centimeters (13.0 to 22.0 inches); 80 percent dark grayish brown (10YR 4/2) broken face and 20 percent grayish brown (10YR 5/2) broken face silty clay; moderate fine subangular blocky, and moderate fine prismatic structure; friable; 3.0 very fine roots throughout and 3.0 fine roots throughout; 3.0 very fine tubular pores; 35 percent faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds and 35 percent prominent gray (10YR 6/1), moist, silt coats on all faces of peds; 1 percent medium faint irregular noncoherent cemented yellowish red (5YR 4/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented red (2.5YR 4/6), moist, iron depletions with clear boundaries in matrix; fragments; clear wavy boundary.; observed in pit, small
    Btg3—56 to 81 centimeters (22.0 to 31.9 inches); 60 percent grayish brown (10YR 5/2) broken face and 40 percent dark grayish brown (10YR 4/2) broken face silty clay loam; moderate fine subangular blocky, and moderate fine and medium prismatic structure; firm; 3.0 very fine roots throughout; 3.0 very fine tubular and 0.5 fine tubular pores; 35 percent faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent medium faint irregular noncoherent cemented yellowish brown (10YR 5/8), 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 and 1 percent medium faint irregular noncoherent cemented black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments; gradual wavy boundary.; observed in pit, small
    Btg4—81 to 117 centimeters (31.9 to 46.1 inches); 50 percent grayish brown (10YR 5/2) broken face and 30 percent light brownish gray (10YR 6/2) broken face and 20 percent brown (10YR 5/3) broken face silt loam; weak medium subangular blocky, and moderate medium prismatic structure; firm; 0.5 very fine roots throughout; 3.0 very fine tubular and 0.5 fine tubular pores; 12 percent faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent medium faint irregular noncoherent cemented yellowish brown (10YR 5/8), 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 black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments; gradual wavy boundary.; observed in pit, small
    2Btg5—117 to 173 centimeters (46.1 to 68.1 inches); 60 percent grayish brown (10YR 5/2) broken face and 30 percent light brownish gray (10YR 6/2) broken face and 10 percent brown (10YR 5/3) broken face silt loam; weak medium subangular blocky, and moderate medium prismatic structure; firm; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 3 percent faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent medium faint irregular noncoherent cemented yellowish brown (10YR 5/8), 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 black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments; gradual wavy boundary.; observed in pit, small
    2Btg6—173 to 203 centimeters (68.1 to 79.9 inches); 50 percent grayish brown (10YR 5/2) broken face and 40 percent light brownish gray (10YR 6/2) broken face and 10 percent brown (10YR 5/3) broken face silty clay loam; weak medium prismatic structure; firm; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 3 percent faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent medium faint irregular noncoherent cemented yellowish brown (10YR 5/8), 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 black (10YR 2/1), moist, iron depletions with clear boundaries in matrix; fragments.; observed in pit, small