IDENTIFIERS

  • Current Taxon Name (Soil Name): Cornell
  • OSD
  • Series Extent
  • User Site ID: S1994IA041001
  • User Pedon ID: S1994IA041001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 95P0225
  • NCSS Pedon Lab Data NASIS Record ID - 67243
  • Print Date: 11/13/2025

    • 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: 42.9447174
  • Std. Longitude: -95.1316605
  • Datum: WGS84
  • Township: 94N
  • Range: 36W
  • Section: 20
  • PLSS Details: NW 1/4, SW 1/4
  • State: Iowa
  • County: IA041—Clay
  • MLRA: 107—Iowa and Missouri Deep Loess Hills
  • Non-MLRA Soil Survey Area: IA041—Clay County, Iowa
  • 7.5 Minute USGS Quad: 42095-H2—Sioux Rapids, Iowa

    • PEDON

  • Describers Name: RAL, JAF
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Cornell
  • Taxonomic Class - Fine, montmorillonitic Typic Argiudolls
  • PSC - 41 to 91 cm.
  • Classificaton Date - 11/15/1994
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: river valley
  • Landform: hillside
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Drainage Class: moderately well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/15/1994 (actual site observation date)
  • Air Photo ID: 56T
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - other
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: wind erosion
    • 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

    23

    —

    —

    —

    —

    0

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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    A1—0 to 15 centimeters (0.0 to 5.9 inches); black (10YR 2/1), very dark gray (10YR 3/1), dry; silty clay loam; weak fine granular structure; friable; 0.5 fine to coarse roots between peds; 0.5 very fine and fine low-continuity vesicular and tubular pores; fragments; clear smooth boundary. Lab sample # 95P01457
    A2—15 to 28 centimeters (5.9 to 11.0 inches); very dark brown (10YR 2/2) interior and black (10YR 2/1) exterior, very dark gray (10YR 3/1), dry; silty clay loam; weak fine subangular blocky structure; friable; 0.5 fine to coarse roots between peds; 0.5 very fine and fine low-continuity vesicular and tubular pores; fragments; clear smooth boundary. Lab sample # 95P01458
    AB—28 to 41 centimeters (11.0 to 16.1 inches); black (10YR 2/1) exterior and very dark brown (10YR 2/2) exterior and very dark grayish brown (10YR 3/2) interior silty clay loam; weak very fine and fine subangular blocky structure; friable; 0.5 fine to coarse roots between peds; 0.5 very fine and fine low-continuity vesicular and tubular pores; fragments; clear smooth boundary. Lab sample # 95P01459
    2Bt1—41 to 53 centimeters (16.1 to 20.9 inches); brown (10YR 4/3) interior silty clay; moderate fine subangular blocky structure; firm; 0.5 fine to coarse roots between peds; 50 percent faint very dark grayish brown (10YR 3/2) coats on faces of peds and in pores; fragments; clear smooth boundary. Lab sample # 95P01460. discontinuous - phpvsfiid 181652; discontinuous - phpvsfiid 181652
    2Bt2—53 to 76 centimeters (20.9 to 29.9 inches); dark yellowish brown (10YR 4/4) interior silty clay; 5 percent strong brown (7.5YR 4/6) fine dendritic and 10 percent dark grayish brown (10YR 4/2) medium distinct dendritic mottles; moderate fine prismatic parts to strong fine and medium subangular blocky structure; very firm; 0.5 fine to coarse roots between peds; 10 percent faint very dark grayish brown (10YR 3/2) coats on faces of peds and in pores; fragments; clear smooth boundary. Lab sample # 95P01461. discontinuous - phpvsfiid 181653; discontinuous - phpvsfiid 181653
    2Bt3—76 to 109 centimeters (29.9 to 42.9 inches); dark yellowish brown (10YR 4/4) interior and yellowish brown (10YR 5/4) interior silty clay; 5 percent strong brown (7.5YR 4/6) fine distinct spherical and 5 percent yellowish brown (10YR 5/6) fine distinct spherical mottles; moderate medium prismatic parts to strong medium angular blocky structure; very firm; 0.5 fine to coarse roots between peds; fragments; abrupt wavy boundary. Lab sample # 95P01462
    3Bt4—109 to 137 centimeters (42.9 to 53.9 inches); brown (7.5YR 4/4) interior clay loam; moderate coarse prismatic parts to moderate medium and coarse angular blocky structure; firm; 0.5 fine roots between peds; very dark grayish brown (10YR 3/2) clay films; fragments; clear wavy boundary. Lab sample # 95P01463
    3Bt5—137 to 157 centimeters (53.9 to 61.8 inches); yellowish brown (10YR 5/6) clay loam; 5 percent grayish brown (10YR 5/2) fine distinct mottles; weak coarse prismatic parts to weak coarse subangular blocky structure; firm; 0.5 fine roots between peds; 20 percent very dark grayish brown (10YR 3/2) clay films on faces of peds; 5 percent fine cylindrical noncoherent cemented red (2.5YR 4/6) dark concretions in cracks; fragments; strong effervescence; gradual wavy boundary. Lab sample # 95P01464. discontinuous - phpvsfiid 181655; discontinuous - phpvsfiid 181655
    3Bt6—157 to 178 centimeters (61.8 to 70.1 inches); yellowish brown (10YR 5/6) clay loam; weak coarse prismatic parts to weak coarse subangular blocky structure; firm; 0.5 fine roots between peds; 10 percent distinct very dark grayish brown (10YR 3/2) clay films on faces of peds; 1 percent fine and medium spherical noncoherent cemented red (2.5YR 4/6) iron concretions between peds; fragments; strong effervescence; gradual wavy boundary. Lab sample # 95P01465. discontinuous - phpvsfiid 181656; discontinuous - phpvsfiid 181656
    3Bt7—178 to 203 centimeters (70.1 to 79.9 inches); yellowish brown (10YR 5/6) clay loam; weak coarse prismatic parts to weak coarse subangular blocky structure; firm; 0.5 fine roots between peds; 10 percent prominent very dark grayish brown (10YR 3/2) clay films on faces of peds; 1 percent fine and medium spherical noncoherent cemented red (2.5YR 4/6) iron concretions between peds; fragments; strong effervescence. Lab sample # 95P01466. discontinuous - phpvsfiid 181657; discontinuous - phpvsfiid 181657