IDENTIFIERS

  • Current Taxon Name (Soil Name): Cornwall
  • OSD
  • Series Extent
  • User Site ID: 1999MO203001M
  • User Pedon ID: 1999MO203001M
  • User Site Association ID: 8560
  • Transect:
  • Transect Stop Number - 6
  • Transect Interval - 200.0
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M9961301
  • NCSS Pedon Lab Data NASIS Record ID - 31554
  • User Project ID: 2021-25NCSPR013
  • Project Name: MLRA 116A - Mark Twain National Forest Update
  • Print Date: 11/26/2024

    • 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: 36.9347861
  • Std. Longitude: -91.5007667
  • Datum: WGS84
  • Township: T26N
  • Range: R5W
  • Section: 9
  • PLSS Details: 3250 feet E and 1750 feet N of the SW corner
  • Location Description: 3,250 feet east and 1,750 feet north of the southwest corner of sec. 9, T. 26 N., R. 5 W.
  • Map Unit: 74642—Cornwall silt loam, rarely ponded, 0 to 3 percent slopes
  • State: Missouri
  • County: MO203—Shannon
  • MLRA: 116A—Ozark Highland
  • MLRA Soil Survey Area: NC-SPM—Springfield, Missouri
  • Non-MLRA Soil Survey Area: MO203—Shannon County, Missouri
  • 7.5 Minute USGS Quad: 36091-H5—Montier, Missouri

    • PEDON

  • Describers Name: LT,BM,SE,MS
  • Current Taxonomic Class: Fine-silty, mixed, active, mesic Fragic Hapludults
  • Current Taxon Kind: taxon above family
  • Pedon Type: TUD pedon
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Cornwall
  • PSC - 20 to 70 cm.
  • Classificaton Date - 9/13/2018
  • Classifier - J.R. Perkins
  • Soil Taxonomic Edition - twelfth edition
  • Sampled As Information:
  • Soil Name - Cornwall
  • Taxonomic Class - Fine-silty, mixed, active, mesic Fragiaquic Paleudults
  • Taxon Kind - series
  • PSC - 20 to 70 cm.
  • Classificaton Date - 11/17/1998
  • Soil Taxonomic Edition - twelfth edition
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • Field Measured Properties: 0 percent of pscs gravel and 22.7 percent of pscs clay and 3.5 percent of pscs sand and 0.46 ratio of cec to clay ratio


    • SITE

  • Parent Material: slope alluvium derived from mixed over pedisediment over slope alluvium
  • Landscape: karst plateau
  • Landform: sinkhole
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: negligible
  • Drainage Class: moderately well
  • Ponding: rare ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/17/1998 (actual site observation date)
  • Air Photo ID: 25
  • 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
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    redox depletions with chroma 2 or less

    lithologic discontinuity

    fragic soil properties

    lithologic discontinuity

    0—20

    20—203

    79—203

    79—109

    79—109

    109—203

    —20—

    —183—

    —124—

    —30—

    —30—

    —94—
    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

    1

    —

    —

    293

    —

    182

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 20 centimeters (0.0 to 7.9 inches); 60 percent dark brown (10YR 3/3) and 40 percent brown (10YR 4/3) silt loam; moderate fine granular structure; very friable; 7.0 fine to coarse roots; 7.0 fine and medium interstitial and tubular pores; fragments; very strongly acid, pH 4.8; clear smooth boundary. Lab sample # MU063706
    Bt1—20 to 38 centimeters (7.9 to 15.0 inches); yellowish brown (10YR 5/4) silt loam; moderate medium subangular blocky structure; friable; 3.0 fine and medium roots; 7.0 fine and medium tubular pores; 25 percent distinct dark yellowish brown (10YR 4/4), moist, clay films on faces of peds; fragments; very strongly acid, pH 4.8; clear smooth boundary. Lab sample # MU063707
    Bt2—38 to 56 centimeters (15.0 to 22.0 inches); yellowish brown (10YR 5/4) silt loam; weak fine subangular blocky structure; friable; 3.0 fine and medium roots; 3.0 medium and coarse tubular and 7.0 fine tubular pores; 10 percent faint yellowish brown (10YR 5/4), moist, clay films on faces of peds; fragments; very strongly acid, pH 4.7; clear smooth boundary. Lab sample # MU063708
    Bt3—56 to 79 centimeters (22.0 to 31.1 inches); yellowish brown (10YR 5/4) silt loam; moderate fine subangular blocky structure; friable; 3.0 fine roots; 7.0 fine and medium tubular pores; 20 percent faint yellowish brown (10YR 5/4), moist, clay films on faces of peds; fragments; very strongly acid, pH 4.6; clear wavy boundary. Lab sample # MU063709
    2Btx—79 to 109 centimeters (31.1 to 42.9 inches); yellowish brown (10YR 5/4) silty clay loam; moderate medium subangular blocky structure; firm; brittle; 0.1 fine roots between peds; 7.0 fine and medium vesicular pores; 10 percent distinct dark grayish brown (10YR 4/2), moist, clay films on faces of peds and 25 percent distinct grayish brown (10YR 5/2), moist, clay films on faces of peds; 1 percent fine faint irregular light gray (10YR 7/2) clay depletions between peds and 10 percent fine distinct irregular yellowish brown (10YR 5/6) masses of oxidized iron between peds; 2 percent by volume nonflat indurated 2-40-75 millimeter chert fragments; very strongly acid, pH 4.5; gradual wavy boundary. Lab sample # MU063710
    3Bt1—109 to 152 centimeters (42.9 to 59.8 inches); light yellowish brown (10YR 6/4) silt loam; moderate medium subangular blocky structure; friable; 7.0 fine and medium tubular pores; 5 percent prominent dark grayish brown (10YR 4/2), moist, clay films in root channels and/or pores and 10 percent prominent light brownish gray (10YR 6/2), moist, silt coats in root channels and/or pores and 35 percent distinct yellowish red (5YR 5/6), moist, clay films on faces of peds and 50 percent prominent light gray (10YR 7/2), moist, silt coats on faces of peds; fragments; very strongly acid, pH 4.5; gradual wavy boundary. Lab sample # MU063711
    3Bt2—152 to 203 centimeters (59.8 to 79.9 inches); yellowish brown (10YR 5/6) silt loam; moderate medium subangular blocky structure; firm; 7.0 fine tubular pores; 15 percent prominent light brownish gray (10YR 6/2), moist, silt coats on faces of peds and 15 percent prominent very pale brown (10YR 7/3), moist, silt coats on faces of peds and 20 percent prominent brown (7.5YR 5/2), moist, clay films on faces of peds and 35 percent distinct strong brown (7.5YR 4/6), moist, clay films on faces of peds; fragments; very strongly acid, pH 4.5, hellige-truog. Lab sample # MU063712