IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksdale
  • OSD
  • Series Extent
  • User Site ID: S1985IL021028
  • User Pedon ID: S1985IL021028
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - IL SCL
  • Lab Pedon # - 85IL021028
  • NCSS Pedon Lab Data NASIS Record ID - 21681
  • Print Date: 6/2/2024

    • 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: 39.5905545
  • Std. Longitude: -89.2145213
  • Datum: WGS84
  • Township: 13N
  • Range: 1W
  • Section: 8
  • PLSS Details: about 140 feet west and 2,140 feet south of the NE section corner
  • Location Description: Described 12/13/84 as Clarksdale SIL (257A) from photo #38 in Christian County
  • Map Unit: 257A—Clarksdale silt loam, 0 to 2 percent slopes
  • Country: US—United States
  • State: Illinois
  • County: IL021—Christian
  • MLRA: 108—Illinois and Iowa Deep Loess and Drift
  • Regional Office: NC—North Central
  • MLRA Soil Survey Area: NC-SPI—Springfield, Illinois
  • Non-MLRA Soil Survey Area: IL021—Christian County, Illinois
  • 7.5 Minute USGS Quad: 39089-E2—Willeys, Illinois

    • PEDON

  • Describers Name: Crew
  • Current Taxonomic Class: Fine, smectitic, mesic Udollic Endoaqualfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: PedonPC
  • Pedon #: 28
  • Correlated Information:
  • Soil Name - Clarksdale
  • PSC - 41 to 91 cm.
  • Classificaton Date - 3/20/2012
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - aquic
  • Moisture Subclass - aeric
  • Sampled As Information:
  • Soil Name - Clarksdale
  • Classificaton Date - 1/4/2010
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Fine-textured Peoria Loess
  • Landscape: upland
  • Landform: flat
  • Hill Slope Profile: summit
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 1/4/2010 (entry creation 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

    Btg1

    Btg2

    Btg3

    Cg

    0

    23

    51

    64

    89

    109

    140

    23

    41

    64

    89

    109

    140

    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

    Btg1

    Btg2

    Btg3

    Cg

    0

    23

    51

    64

    89

    109

    140

    23

    41

    64

    89

    109

    140

    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

    Btg1

    Btg2

    Btg3

    Cg

    0

    23

    51

    64

    89

    109

    140

    23

    41

    64

    89

    109

    140

    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—41

    41—140

    —41—

    —99—
    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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    1025

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    190

    13

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    Ap—0 to 23 centimeters (0.0 to 9.1 inches); 95 percent very dark grayish brown (10YR 3/2) and 5 percent gray (10YR 5/1), grayish brown (10YR 5/2), dry; silt loam; weak fine granular structure; friable; few (0.8) fine roots between peds; 1 percent fine distinct irregular dark brown (7.5YR 3/3), moist, iron-manganese masses; fragments; slightly acid, pH 6.5; abrupt smooth boundary. Lab sample # IL31485
    E—23 to 41 centimeters (9.1 to 16.1 inches); 90 percent gray (10YR 5/1) silt loam; weak medium platy structure; friable; few (0.8) fine roots between peds; 1 percent fine prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron and 1 percent fine distinct irregular dark brown (7.5YR 3/3), moist, iron-manganese masses; fragments; strongly acid, pH 5.1; clear smooth boundary. Lab sample # IL31486
    Bt—41 to 64 centimeters (16.1 to 25.2 inches); yellowish brown (10YR 5/4) silty clay; moderate fine subangular blocky structure; firm; few (0.8) fine roots between peds; 51 percent distinct dark gray (10YR 4/1), moist, clay films on all faces of peds and 51 percent distinct very dark grayish brown (10YR 3/2), moist, organoargillans on all faces of peds and 51 percent ; 1 percent fine distinct irregular light brownish gray (10YR 6/2), moist, iron depletions and 1 percent fine distinct irregular dark brown (7.5YR 3/3), moist, iron-manganese masses and 1 percent fine prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron and 51 percent distinct irregular light brownish gray (10YR 6/2), moist, clay depletions on faces of peds; fragments; strongly acid, pH 5.1; clear smooth boundary. Lab sample # IL31487
    Btg1—64 to 89 centimeters (25.2 to 35.0 inches); light brownish gray (10YR 6/2) silty clay loam; moderate medium subangular blocky structure; firm; few (0.8) fine roots between peds; 25 percent distinct dark gray (10YR 4/1) clay films on all faces of peds and 25 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels; 10 percent fine prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron and 25 percent fine prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron and 25 percent medium distinct irregular dark brown (7.5YR 3/3), moist, iron-manganese masses; fragments; strongly acid, pH 5.1; clear smooth boundary. Lab sample # IL31488
    Btg2—89 to 109 centimeters (35.0 to 42.9 inches); light brownish gray (10YR 6/2) silty clay loam; moderate coarse subangular blocky structure; firm; few (0.8) fine roots between peds; 25 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels and 35 percent distinct dark gray (10YR 4/1), moist, clay films on all faces of peds; 10 percent medium prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron and 10 percent fine prominent irregular dark brown (7.5YR 3/3), moist, iron-manganese masses and 10 percent fine prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron; fragments; moderately acid, pH 5.9; clear smooth boundary. Lab sample # IL31489
    Btg3—109 to 140 centimeters (42.9 to 55.1 inches); light brownish gray (10YR 6/2) silty clay loam; weak coarse subangular blocky structure; firm; 25 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along pores and 35 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent fine prominent irregular dark brown (7.5YR 3/3), moist, iron-manganese masses and 10 percent medium prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron and 10 percent fine prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron and 25 percent fine prominent threadlike dark brown (7.5YR 3/3), moist, iron-manganese masses on surfaces along root channels; fragments; slightly acid, pH 6.3; clear smooth boundary. Lab sample # IL31490
    Cg—140 to 152 centimeters (55.1 to 59.8 inches); gray (10YR 6/1) silt loam; massive; friable; 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along pores; 1 percent fine prominent irregular dark brown (7.5YR 3/3), moist, iron-manganese masses and 10 percent fine prominent threadlike dark brown (7.5YR 3/3), moist, iron-manganese masses on surfaces along root channels and 25 percent medium prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron; fragments; neutral, pH 6.7. Lab sample # IL31491