IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksdale
  • OSD
  • Series Extent
  • User Site ID: S1985IL149033
  • User Pedon ID: S1985IL149033
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - IL SCL
  • Lab Pedon # - 85IL149033
  • NCSS Pedon Lab Data NASIS Record ID - 21896
  • Print Date: 2/17/2025

    • 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: 39.8035793
  • Std. Longitude: -90.8210706
  • Datum: WGS84
  • Township: 3S
  • Range: 4W
  • Section: 14
  • PLSS Details: 825 feet W and 2970 feet S of the NE corner of section
  • Map Unit: 257A—Clarksdale silt loam, 0 to 2 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-G7—Perry West, Illinois

    • PEDON

  • Describers Name: Patty A. Cook
  • Current Taxonomic Class: Fine, smectitic, mesic Udollic Endoaqualfs
  • Current Taxon Kind: series
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: PedonPC
  • Pedon #: 33
  • Correlated Information:
  • Soil Name - Clarksdale
  • PSC - 33 to 83 cm.
  • Classificaton Date - 7/30/2015
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture Subclass - aquic
  • Sampled As Information:
  • Soil Name - Clarksdale
  • PSC - 66 to 116 cm.
  • Classificaton Date - 6/1/1985
  • 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: 6/1/1985 (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

    E

    Bt

    Btg

    B't

    BC

    0

    18

    33

    66

    109

    137

    18

    33

    66

    109

    137

    152

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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

    E

    Bt

    Btg

    B't

    BC

    0

    18

    33

    66

    109

    137

    18

    33

    66

    109

    137

    152

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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

    E

    Bt

    Btg

    B't

    BC

    0

    18

    33

    66

    109

    137

    18

    33

    66

    109

    137

    152

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

    ochric epipedon

    argillic horizon

    0—33

    33—137

    —33—

    —104—
    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

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    198

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    Ap—0 to 18 centimeters (0.0 to 7.1 inches); very dark grayish brown (10YR 3/2), gray (10YR 5/1), dry; silt loam; weak thick platy parts to moderate very fine subangular blocky structure; very friable; few (10.0) fine roots between peds; fragments; neutral, pH 7.3; abrupt smooth boundary. Lab sample # IL32200
    E—18 to 33 centimeters (7.1 to 13.0 inches); gray (10YR 5/1) silt loam; weak medium platy, and weak thick platy structure; friable; few (3.0) fine roots between peds; 25 percent prominent cylindrical gray (10YR 6/1), moist, clay depletions with sharp boundaries on faces of peds; fragments; neutral, pH 7.0; abrupt smooth boundary. Lab sample # IL32201
    Bt—33 to 66 centimeters (13.0 to 26.0 inches); grayish brown (10YR 5/2) silty clay; mottles; moderate fine subangular blocky structure; friable; 3.0 roots; 10 percent faint very dark gray (10YR 3/1), moist, organoargillans on top faces of peds and 10 percent faint dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 10 percent medium distinct irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; moderately acid, pH 6.0; clear smooth boundary. Lab sample # IL32202
    Btg—66 to 109 centimeters (26.0 to 42.9 inches); grayish brown (10YR 5/2) silty clay loam; mottles; moderate fine subangular blocky, and moderate medium subangular blocky structure; firm; 3.0 roots; 25 percent prominent very dark gray (10YR 3/1), moist, organoargillans on all faces of peds and 25 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 10 percent medium distinct irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix; fragments; moderately acid, pH 6.0; clear smooth boundary. Lab sample # IL32203
    B't—109 to 137 centimeters (42.9 to 53.9 inches); yellowish brown (10YR 5/4) silt loam; mottles; moderate medium subangular blocky structure; friable; 0.8 roots; 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels and 10 percent faint brown (10YR 5/3), moist, clay films on vertical faces of peds; 1 percent fine distinct irregular grayish brown (10YR 5/2), moist, iron depletions with diffuse boundaries in matrix and 1 percent fine faint irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix; fragments; neutral, pH 6.8; gradual smooth boundary. Lab sample # IL32204
    BC—137 to 152 centimeters (53.9 to 59.8 inches); yellowish brown (10YR 5/4) silty clay loam; mottles; moderate fine subangular blocky structure; friable; 0.8 roots; 25 percent prominent very dark gray (10YR 3/1), moist, organoargillans on all faces of peds; 1 percent fine distinct irregular grayish brown (10YR 5/2), moist, iron depletions with diffuse boundaries in matrix and 1 percent fine faint irregular dark yellowish brown (10YR 4/4), moist, iron-manganese masses with diffuse boundaries in matrix; fragments; neutral, pH 6.8. Lab sample # IL32205