IDENTIFIERS

  • Current Taxon Name (Soil Name): Knox
  • OSD
  • Series Extent
  • User Site ID: 1992MO053001
  • User Pedon ID: 1992MO053001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M9205301
  • NCSS Pedon Lab Data NASIS Record ID - 28786
  • Print Date: 11/24/2024

    • 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: 38.9112583
  • Std. Longitude: -93.0017750
  • Datum: WGS84
  • Township: T48N
  • Range: R19W
  • Section: 21
  • PLSS Details: 1200 'N and 500 'W of the SE corner
  • Location Description: 1200 'N and 500 'W of the SE corner of Sec. 21, T48N., R19W.
  • Map Unit: 60024—Menfro silt loam, 3 to 9 percent slopes, eroded
  • State: Missouri
  • County: MO053—Cooper
  • MLRA: 115—Central Mississippi Valley Wooded Slopes
  • Regional Office: NC—North Central
  • MLRA Soil Survey Area: NC-UNI—Union, Missouri
  • Non-MLRA Soil Survey Area: MO053—Cooper County, Missouri
  • 7.5 Minute USGS Quad: 38093-H1—Nelson, Missouri

    • PEDON

  • Describers Name: Unknown
  • Current Taxonomic Class: Fine-silty, mixed, superactive, mesic Mollic Hapludalfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Knox
  • PSC - 20 to 70 cm.
  • Classificaton Date - 1/27/2021
  • Classifier - J.R. Perkins
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Knox
  • PSC - 20 to 70 cm.
  • Classificaton Date - 1/25/2011
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • Field Measured Properties: 0 percent of pscs gravel and 0.6 percent of pscs sand and 30.9 percent of pscs clay


    • SITE

  • Parent Material: fine-silty loess derived from sedimentary rock
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Position: lower third
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 3/7/1991 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - pastureland, tame
  • 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

    0—20

    20—122

    —20—

    —102—
    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

    5

    —

    —

    247.4

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 20 centimeters (0.0 to 7.9 inches); dark brown (10YR 3/3) silt loam; 3 percent sand; 81 percent silt; 17 percent clay; weak fine granular structure; friable; common (3.0) very fine roots throughout; fragments; slightly acid, pH 6.5, pH meter; abrupt smooth boundary. Lab sample # MU044441
    Bt1—20 to 43 centimeters (7.9 to 16.9 inches); dark yellowish brown (10YR 4/4) silt loam; 2 percent sand; 71 percent silt; 27 percent clay; weak fine subangular blocky structure; firm; common (3.0) very fine roots throughout; 15 percent distinct clay films on all faces of peds; fragments; neutral, pH 6.7, pH meter; clear smooth boundary. Lab sample # MU044442
    Bt2—43 to 69 centimeters (16.9 to 27.2 inches); dark yellowish brown (10YR 4/4) silty clay loam; 2 percent sand; 64 percent silt; 34 percent clay; moderate very fine subangular blocky structure; firm; common (3.0) very fine roots throughout; 70 percent prominent clay films on all faces of peds; fragments; slightly acid, pH 6.5, pH meter; gradual smooth boundary. Lab sample # MU044443
    Bt3—69 to 102 centimeters (27.2 to 40.2 inches); dark yellowish brown (10YR 4/4) silty clay loam; 2 percent sand; 63 percent silt; 35 percent clay; moderate fine subangular blocky structure; firm; common (3.0) very fine roots throughout; 37 percent prominent clay films on all faces of peds; fragments; slightly acid, pH 6.2, pH meter; gradual smooth boundary. Lab sample # MU044444
    Bt4—102 to 122 centimeters (40.2 to 48.0 inches); dark yellowish brown (10YR 4/4) silty clay loam; 3 percent sand; 67 percent silt; 31 percent clay; weak medium subangular blocky structure; firm; few (0.5) very fine roots throughout; 15 percent prominent clay films on all faces of peds; fragments; moderately acid, pH 5.9, pH meter; gradual smooth boundary. Lab sample # MU044445
    C—122 to 152 centimeters (48.0 to 59.8 inches); yellowish brown (10YR 5/4) silty clay loam; 3 percent sand; 68 percent silt; 29 percent clay; massive; firm; few (0.5) very fine roots throughout; 15 percent prominent clay films on surfaces along root channels; fragments; moderately acid, pH 5.9, pH meter. Lab sample # MU044446