IDENTIFIERS

  • Current Taxon Name (Soil Name): Tonti
  • OSD
  • Series Extent
  • User Site ID: 1995MO035006M
  • User Pedon ID: 1995MO035006M
  • Vegetation Plot ID: 1995MO035006
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M9560106
  • NCSS Pedon Lab Data NASIS Record ID - 31946
  • User Project ID: 2021-26NCSPR013
  • Project Name: MLRA 116A - Mark Twain National Forest Update
  • Print Date: 12/7/2025

    • 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: 37.0135472
  • Std. Longitude: -91.1962556
  • Datum: WGS84
  • Township: T27N
  • Range: R2W
  • Section: 8
  • PLSS Details: 1349 feet E and 40 feet N of the SW corner
  • State: Missouri
  • County: MO035—Carter
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO612—Carter County, Missouri, Northern & Eastern Parts
  • 7.5 Minute USGS Quad: 37091-A2—Stegall Mountain, Missouri

    • PEDON

  • Describers Name: Melvin Simmons, Dennis Meinert, Scott Paine
  • Current Taxonomic Class: Fine-loamy, mixed, active, mesic Typic Fragiudults
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 6
  • Correlated Information:
  • Soil Name - Tonti
  • PSC - 20 to 51 cm.
  • Classificaton Date - 3/16/2020
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Clarksville
  • Taxonomic Class - Fine-loamy, siliceous, active, mesic Typic Fragiudults
  • Taxon Kind - series
  • PSC - 20 to 51 cm.
  • Classificaton Date - 9/14/1995
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - udic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1


    • SITE

  • Parent Material: silty slope alluvium derived from mixed over pedisediment over residuum
  • Landscape: hills
  • Landform: ridge
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Position: upper third
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: medium
  • Drainage Class: moderately well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Roubidoux Formation formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/14/1995 (actual site observation date)
  • Air Photo ID: 37091a2sw
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: landslip erosion highly deformed
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    QUCO2

    QUST

    QUVE

    PIEC2

    CARYA

    Quercus coccinea

    Quercus stellata

    Quercus velutina

    Pinus echinata

    Carya

    scarlet oak

    post oak

    black oak

    shortleaf pine

    hybrid hickory

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    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    fragipan

    noncoherent

    51 - 69

    - 18 -

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

    ochric epipedon

    argillic horizon

    fragipan

    0—20

    20—152

    51—69

    —20—

    —132—

    —18—
    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

    4

    —

    —

    289

    —

    320

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    A—0 to 8 centimeters (0.0 to 3.1 inches); brown (10YR 5/3) interior silt loam; weak fine subangular blocky, and weak fine granular structure; very friable; 10.0 very fine roots throughout and 10.0 medium roots throughout and 10.0 fine roots throughout and 10.0 coarse roots throughout; 10.0 very fine tubular and 10.0 medium tubular and 10.0 fine tubular and 10.0 coarse tubular pores; 5 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU054217; observed in pit, small
    BA—8 to 20 centimeters (3.1 to 7.9 inches); yellowish brown (10YR 5/4) interior silt loam; weak fine subangular blocky structure; friable; 3.0 very fine roots throughout and 3.0 medium roots throughout and 3.0 fine roots throughout; 10.0 very fine tubular pores; 18 percent distinct grayish brown (10YR 5/2), moist, organic stains on vertical faces of peds and 18 percent distinct grayish brown (10YR 5/2), moist, clay films on all faces of peds; 5 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary.; observed in pit, small
    Bt1—20 to 41 centimeters (7.9 to 16.1 inches); strong brown (7.5YR 5/6) interior silty clay loam; moderate medium subangular blocky structure; friable; 3.0 very fine roots throughout and 3.0 medium roots throughout and 3.0 fine roots throughout; 10.0 very fine tubular pores; 18 percent prominent light brownish gray (10YR 6/2), moist, organic stains on vertical faces of peds and 75 percent distinct brown (7.5YR 4/4), moist, clay films on all faces of peds; 5 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary.; observed in pit, small
    Bt2—41 to 51 centimeters (16.1 to 20.1 inches); strong brown (7.5YR 5/6) interior silty clay loam; moderate medium subangular blocky structure; friable; 3.0 very fine roots throughout and 3.0 medium roots throughout and 3.0 fine roots throughout; 10.0 very fine tubular pores; 75 percent distinct brown (7.5YR 4/4), moist, clay films on all faces of peds; 5 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary.; observed in pit, small
    2Btx—51 to 69 centimeters (20.1 to 27.2 inches); dark yellowish brown (10YR 4/6) interior gravelly silty clay loam; weak coarse prismatic structure; very firm; brittle; 3.0 very fine roots throughout and 3.0 medium roots throughout and 3.0 fine roots throughout; 10.0 very fine tubular and 10.0 medium tubular and 10.0 fine tubular pores; 35 percent prominent light gray (10YR 7/2), moist, organic stains on all faces of peds and 35 percent distinct strong brown (7.5YR 5/6), moist, clay films on all faces of peds and 35 percent distinct gray (10YR 5/1), moist, clay films on all faces of peds; 30 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments; clear wavy boundary. Lab sample # MU054221; observed in pit, small
    3Bt3—69 to 94 centimeters (27.2 to 37.0 inches); 80 percent dark yellowish brown (10YR 4/4) interior and 20 percent yellowish brown (10YR 5/6) interior silty clay; moderate medium subangular blocky structure; firm; 0.5 very fine roots throughout; 0.5 very fine tubular and 0.5 fine tubular pores; 35 percent distinct light brownish gray (10YR 6/2), moist, organic stains on all faces of peds and 35 percent distinct dark gray (10YR 4/1), moist, clay films on all faces of peds and 35 percent distinct strong brown (7.5YR 4/6), moist, clay films on all faces of peds and 35 percent distinct light brownish gray (10YR 6/2), moist, clay films on all faces of peds; 15 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments; gradual wavy boundary.; observed in pit, small
    3Bt4—94 to 122 centimeters (37.0 to 48.0 inches); 70 percent yellowish brown (10YR 5/6) interior and 30 percent brownish yellow (10YR 6/6) interior clay; moderate medium subangular blocky structure; firm; 0.5 fine roots throughout; 3.0 medium tubular and 0.5 fine vesicular and 3.0 fine tubular pores; 15 percent prominent light brownish gray (10YR 6/2), moist, organic stains on all faces of peds and 15 percent prominent red (2.5YR 4/8), moist, clay films on all faces of peds and 15 percent prominent red (2.5YR 4/6), moist, clay films on all faces of peds and 35 percent distinct brown (7.5YR 4/4), moist, clay films on all faces of peds and 35 percent prominent dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 15 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary.; observed in pit, small
    3Bt5—122 to 152 centimeters (48.0 to 59.8 inches); 60 percent yellowish brown (10YR 5/6) interior and 40 percent brownish yellow (10YR 6/8) interior very gravelly clay loam; weak fine subangular blocky structure; firm; 0.5 medium roots throughout and 0.5 fine roots throughout; 3.0 medium tubular and 0.5 fine vesicular and 3.0 fine tubular pores; 15 percent distinct brown (10YR 5/3), moist, clay films on all faces of peds and 15 percent distinct red (2.5YR 4/8), moist, clay films on all faces of peds and 35 percent prominent light gray (10YR 7/2), moist, organic stains on all faces of peds; 50 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter chert fragments.; observed in pit, small