IDENTIFIERS

  • Current Taxon Name (Soil Name): Okaw
  • OSD
  • Series Extent
  • User Site ID: 1978IL157035
  • User Pedon ID: 1978IL157035
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - IL SCL
  • Lab Pedon # - 78IL157035
  • NCSS Pedon Lab Data NASIS Record ID - 21109
  • Print Date: 4/24/2025

    • 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: 38.1911061
  • Std. Longitude: -89.8968853
  • Datum: WGS84
  • Township: 4S
  • Range: 7W
  • Section: 17
  • PLSS Details: 2250 feet W & 600 feet S of NE corner
  • State: Illinois
  • County: IL157—Randolph
  • MLRA: 114—Southern Illinois and Indiana Thin Loess and Till Plain
  • Non-MLRA Soil Survey Area: IL157—Randolph County, Illinois
  • 7.5 Minute USGS Quad: 38089-B8—Red Bud, Illinois

    • PEDON

  • Describers Name: VAK, GH
  • Current Taxonomic Class: Fine, smectitic, mesic Chromic Vertic Albaqualfs
  • Current Taxon Kind: series
  • Pedon Type: map unit inclusion
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: PedonPC
  • Pedon #: 35
  • Correlated Information:
  • Soil Name - Okaw
  • PSC - 36 to 86 cm.
  • Classificaton Date - 1/4/2010
  • Moisture Class - aquic
  • Sampled As Information:
  • Soil Name - Okaw
  • Classificaton Date - 8/1/1978
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Peoria loess mantle over clayey lacustrine sediments
  • Landscape: lake plain
  • Landform: terrace, lakebed
  • Runoff: low
  • Drainage Class: poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/1/1978 (actual site observation date)
  • Air Photo ID:
  • 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
  • Yield Study ID -
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    0—36

    36—127

    —-

    —-
    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

    —

    —

    122

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A1—0 to 8 centimeters (0.0 to 3.1 inches); dark grayish brown (10YR 4/2) silt loam; moderate medium granular structure; friable; 5.0 roots between peds; fragments; strongly acid, pH 5.3, lamotte-morgan; abrupt smooth boundary. Lab sample # IL26087; observed in push tube
    A21—8 to 20 centimeters (3.1 to 7.9 inches); grayish brown (10YR 5/2) silt loam; moderate medium subangular blocky structure; friable; 3.0 roots between peds; fragments; strongly acid, pH 5.2, lamotte-morgan; abrupt smooth boundary. Lab sample # IL26088; observed in push tube
    A22—20 to 36 centimeters (7.9 to 14.2 inches); light brownish gray (10YR 6/2) silt loam; 10 percent dark yellowish brown (10YR 4/6) medium distinct mottles; moderate medium subangular blocky structure; firm; 3.0 roots between peds; fragments; strongly acid, pH 5.2, lamotte-morgan; clear smooth boundary. Lab sample # IL26089; observed in push tube
    B1—36 to 51 centimeters (14.2 to 20.1 inches); dark grayish brown (10YR 4/2) silty clay loam; 10 percent dark yellowish brown (10YR 4/6) medium faint mottles; strong coarse subangular blocky structure; very firm; 3.0 roots between peds; fragments; strongly acid, pH 5.1, lamotte-morgan; clear smooth boundary. Lab sample # IL26090; observed in push tube
    IIB21g—51 to 74 centimeters (20.1 to 29.1 inches); dark grayish brown (10YR 4/2) silty clay; 1 percent dark yellowish brown (10YR 4/6) fine faint mottles; strong medium prismatic structure; very firm; 0.6 roots between peds; faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; fragments; strongly acid, pH 5.1, lamotte-morgan; clear smooth boundary. Lab sample # IL26091; observed in push tube. discontinuous - phpvsfiid 481394; discontinuous - phpvsfiid 481394
    IIB22g—74 to 109 centimeters (29.1 to 42.9 inches); dark grayish brown (10YR 4/2) silty clay; strong coarse prismatic structure; very firm; 0.6 roots between peds; faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; fragments; very strongly acid, pH 5.0, lamotte-morgan; clear smooth boundary. Lab sample # IL26092; observed in push tube. discontinuous - phpvsfiid 481393; discontinuous - phpvsfiid 481393
    IIB3—109 to 127 centimeters (42.9 to 50.0 inches); weak red (2.5YR 4/2) silty clay; weak coarse prismatic structure; very firm; faint weak red (2.5YR 4/2), moist, clay films on all faces of peds; fragments; very strongly acid, pH 4.9, lamotte-morgan; gradual smooth boundary. Lab sample # IL26093; observed in push tube. patchy - phpvsfiid 481392; patchy - phpvsfiid 481392
    IIC—127 to 152 centimeters (50.0 to 59.8 inches); weak red (2.5YR 4/2) silty clay; structureless massive; very firm; fragments; very strongly acid, pH 4.9, lamotte-morgan. Lab sample # IL26094; observed in push tube