IDENTIFIERS

  • Current Taxon Name (Soil Name): Okaw
  • OSD
  • Series Extent
  • User Site ID: 1981IL013019
  • User Pedon ID: 1981IL013019
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - IL SCL
  • Lab Pedon # - 81IL013019
  • NCSS Pedon Lab Data NASIS Record ID - 21323
  • Print Date: 3/2/2025

    • 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: 38.9538722
  • Std. Longitude: -90.5649049
  • Datum: WGS84
  • Township: 13S
  • Range: 1W
  • Section: 6
  • PLSS Details: 1080 feet west and 280 feet north of southeast corner
  • State: Illinois
  • County: IL013—Calhoun
  • MLRA: 115—Central Mississippi Valley Wooded Slopes
  • Non-MLRA Soil Survey Area: IL013—Calhoun County, Illinois

    • PEDON

  • Describers Name: MEL, JAR
  • 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 #: 19
  • Correlated Information:
  • Soil Name - Okaw
  • PSC - 33 to 83 cm.
  • Classificaton Date - 6/8/2009
  • Moisture Class - aquic
  • Sampled As Information:
  • Soil Name - Okaw
  • Classificaton Date - 8/1/1981
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Peoria loess and/or clayey lacustrine deposits
  • Landform: terrace, lake terrace
  • Runoff: negligible
  • Drainage Class: poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/1/1981 (actual site observation date)
  • Air Photo ID:
  • 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
  • Yield Study ID -
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    0—33

    33—132

    —-

    —-
    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

    0.5

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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    —

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    A1—0 to 13 centimeters (0.0 to 5.1 inches); dark gray (5Y 4/1) silty clay loam; moderate coarse granular structure; friable; 3.0 medium roots between peds; fragments; very strongly acid, pH 5.0, lamotte-morgan; abrupt smooth boundary. Lab sample # IL27841
    A2—13 to 33 centimeters (5.1 to 13.0 inches); gray (5Y 5/1) silty clay loam; moderate medium subangular blocky structure; friable; 3.0 medium roots between peds; fragments; strongly acid, pH 5.3, lamotte-morgan; abrupt smooth boundary. Lab sample # IL27842
    B21tg—33 to 56 centimeters (13.0 to 22.0 inches); very dark grayish brown (2.5Y 3/2) silty clay; weak medium angular blocky structure; firm; 0.6 fine roots between peds; faint very dark gray (5Y 3/1), moist, clay films on all faces of peds; 1 percent fine distinct 10YR 2/ (10YR 2/), moist, iron-manganese concretions in matrix; fragments; strongly acid, pH 5.1, lamotte-morgan; clear smooth boundary. Lab sample # IL27843. patchy - phpvsfiid 460406; patchy - phpvsfiid 460406
    A1b—56 to 81 centimeters (22.0 to 31.9 inches); black (10YR 2/1) silty clay; weak medium prismatic parts to moderate medium angular blocky structure; firm; 0.6 fine roots between peds; slickensides (pedogenic) on all faces of peds; fragments; very strongly acid, pH 4.9, lamotte-morgan; clear smooth boundary. Lab sample # IL27844
    B21tgb—81 to 94 centimeters (31.9 to 37.0 inches); black (5Y 2.5/2) and olive gray (5Y 5/2) silty clay; weak medium angular blocky structure; firm; 0.6 fine roots between peds; faint black (5Y 2.5/1), moist, clay films on all faces of peds and slickensides (pedogenic) on all faces of peds; fragments; moderately acid, pH 5.7, lamotte-morgan; clear smooth boundary. Lab sample # IL27845. discontinuous - phpvsfiid 460407; discontinuous - phpvsfiid 460407
    B22tgb—94 to 117 centimeters (37.0 to 46.1 inches); olive gray (5Y 4/2) and olive (5Y 4/4) and light olive brown (2.5Y 5/4) silty clay; weak medium angular blocky structure; firm; 0.1 fine roots between peds; distinct olive gray (5Y 4/2), moist, clay films on all faces of peds and slickensides (pedogenic) on all faces of peds; 1 percent fine prominent 10YR 2/ (10YR 2/), moist, iron-manganese concretions in matrix; fragments; slightly acid, pH 6.5, lamotte-morgan; gradual smooth boundary. Lab sample # IL27846. discontinuous - phpvsfiid 460408; discontinuous - phpvsfiid 460408
    B23tgb—117 to 132 centimeters (46.1 to 52.0 inches); light olive brown (2.5Y 5/4) and olive (5Y 5/3) silty clay; weak medium angular blocky structure; firm; 0.1 fine roots between peds; distinct olive gray (5Y 5/2), moist, clay films on all faces of peds and slickensides (pedogenic) on all faces of peds; 1 percent fine prominent 10YR 2/ (10YR 2/), moist, iron-manganese concretions in matrix; prominent light gray (5Y 7/1), moist, carbonate concretions in matrix; fragments; slight effervescence, by hcl, unspecified; slightly alkaline, pH 7.8, lamotte-morgan; clear smooth boundary. Lab sample # IL27847. discontinuous - phpvsfiid 460409; discontinuous - phpvsfiid 460409
    B3gb—132 to 175 centimeters (52.0 to 68.9 inches); olive gray (5Y 4/2) and light olive brown (2.5Y 5/4) and dark grayish brown (2.5Y 4/2) silty clay; weak coarse angular blocky, and weak thick platy structure; firm; slickensides (pedogenic) on all faces of peds; prominent light gray (5Y 7/1), moist, carbonate concretions in matrix; fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, lamotte-morgan. Lab sample # IL27848