IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksdale
  • OSD
  • Series Extent
  • User Site ID: S1955IL149008
  • User Pedon ID: S1955IL149008
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 40A2747
  • NCSS Pedon Lab Data NASIS Record ID - 37327
  • Print Date: 4/27/2025

    • 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: 39.7399054
  • Std. Longitude: -90.9080321
  • Datum: WGS84
  • Township: 4S
  • Range: 4W
  • Section: 7
  • PLSS Details: NW 160, NE 40, NE 10 ,about 21 rods South &106 feet West of road junction; in Hadley Township in MLRA 115C
  • Map Unit: 283B—Downsouth silt loam, 2 to 5 percent slopes
  • Country: US—United States
  • State: Illinois
  • County: IL149—Pike
  • MLRA: 115—Central Mississippi Valley Wooded Slopes
  • Regional Office: NC—North Central
  • MLRA Soil Survey Area: NC-SPI—Springfield, Illinois
  • Non-MLRA Soil Survey Area: IL149—Pike County, Illinois
  • 7.5 Minute USGS Quad: 39090-F8—Baylis, Illinois

    • PEDON

  • Describers Name: Herman L. Wascher, George O. Walker, & Charles E. Downey
  • Current Taxonomic Class: Fine, mesic Typic Argialbolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: research site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 8
  • Correlated Information:
  • Soil Name - Clarksdale
  • PSC - 48 to 98 cm.
  • Classificaton Date - 8/5/2015
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - aquic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Clarksdale
  • Classificaton Date - 10/21/1955
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Fine-textured Peoria Loess
  • Landscape: till plain
  • Landform: ground moraine
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/21/1955 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    Ap

    A

    E1

    E2

    Bw1

    Bw2

    Bw3

    BC

    C1

    2C2

    0

    20

    28

    38

    48

    61

    79

    104

    132

    191

    20

    28

    38

    48

    61

    79

    104

    132

    191

    279

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    Ap

    A

    E1

    E2

    Bw1

    Bw2

    Bw3

    BC

    C1

    2C2

    0

    20

    28

    38

    48

    61

    79

    104

    132

    191

    20

    28

    38

    48

    61

    79

    104

    132

    191

    279

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    Ap

    A

    E1

    E2

    Bw1

    Bw2

    Bw3

    BC

    C1

    2C2

    0

    20

    28

    38

    48

    61

    79

    104

    132

    191

    20

    28

    38

    48

    61

    79

    104

    132

    191

    279

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    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    albic horizon

    argillic horizon

    abrupt textural change

    0—28

    28—48

    48—104

    48—48

    —28—

    —20—

    —56—

    —-
    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

    2

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    Ap—0 to 20 centimeters (0.0 to 7.9 inches); very dark gray (10YR 3/1) silt loam; granular structure; friable; fragments. Lab sample # 40A21602
    A—20 to 28 centimeters (7.9 to 11.0 inches); 5 percent dark gray (10YR 4/1) and 95 percent very dark gray (10YR 3/1) silt loam; granular structure; friable; ; fragments. Lab sample # 40A21603
    E1—28 to 38 centimeters (11.0 to 15.0 inches); 95 percent dark gray (10YR 4/1) and 3 percent gray (10YR 5/1) and 2 percent very dark gray (10YR 3/1) silt loam; weak thin platy structure; friable; and ; fragments. Lab sample # 40A21604
    E2—38 to 48 centimeters (15.0 to 18.9 inches); 94 percent gray (10YR 6/1) and 2 percent very dark gray (10YR 3/1) and 2 percent dark yellowish brown (10YR 3/4) and 2 percent yellowish brown (10YR 5/6) silt loam; weak medium subangular blocky structure; friable; ; and and ; fragments. Lab sample # 40A21605
    Bw1—48 to 61 centimeters (18.9 to 24.0 inches); yellowish brown (10YR 5/6) silty clay loam; strong medium subangular blocky structure; firm; ; and 21 percent fine prominent grayish brown (10YR 5/2) iron depletions and 21 percent fine prominent very dark gray (10YR 3/1) iron-manganese masses; ; fragments. Lab sample # 40A21606
    Bw2—61 to 79 centimeters (24.0 to 31.1 inches); yellowish brown (10YR 5/4) silty clay; mottles; strong coarse subangular blocky parts to angular blocky, and strong medium subangular blocky parts to angular blocky structure; very firm; and ; 3 percent coarse black (10YR 2/1) iron-manganese concretions and 10 percent fine black (10YR 2/1) iron-manganese concretions and 21 percent fine faint pale brown (10YR 6/3) iron depletions; fragments. Lab sample # 40A21607. the field described structure for the Bw2 horizon was strong medium & coarse subangular blocky parts to angular blocky structure
    Bw3—79 to 104 centimeters (31.1 to 40.9 inches); yellowish brown (10YR 5/6) silty clay loam; mottles; moderate coarse angular blocky structure; firm; black (10YR 2/1) organic stains on all faces of peds; 21 percent fine prominent light gray (10YR 7/2) iron depletions; ; fragments. Lab sample # 40A21608
    BC—104 to 132 centimeters (40.9 to 52.0 inches); brownish yellow (10YR 6/6) silty clay loam; weak very coarse angular blocky parts to massive; black (10YR 2/1) organic stains on surfaces along root channels and and ; 21 percent fine prominent light gray (10YR 7/2) iron depletions; black (10YR 2/1) worm casts; fragments. Lab sample # 40A21609
    C1—132 to 191 centimeters (52.0 to 75.2 inches); 1 percent black (10YR 2/1) and 99 percent yellowish brown (10YR 5/8) silt loam; mottles; massive; and ; 21 percent fine prominent light brownish gray (10YR 6/2) iron depletions; fragments. Lab sample # 40A21610
    2C2—191 to 279 centimeters (75.2 to 109.8 inches); brown (7.5YR 4/4) silt loam; mottles; massive; ; distinct brown (7.5YR 5/2) iron depletions; fragments. Lab sample # 40A21611. this 2C2 horizon was not sampled for lab data; Roxana Silts (formerly called Farmdale Loess) is the dominant parent material for this 2C2 horizon; the brown (7.5YR 4/4) matrix color & a probable increase in sand content supports the Roxana Silts as the parent material; the authors described the parent material as: about 75 inches of Peoria Loess over about 35 inches of Roxana Silts (Farmdale Loess) and the underlying buried soil developed in probable Loveland Loess (not sampled)