IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksdale
  • OSD
  • Series Extent
  • User Site ID: S1960IL021001
  • User Pedon ID: S1960IL021001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 40A1482
  • NCSS Pedon Lab Data NASIS Record ID - 35090
  • Print Date: 11/23/2024

    • 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: 39.5854694
  • Std. Longitude: -89.3709077
  • Datum: WGS84
  • Township: 13N
  • Range: 3W
  • Section: 12
  • PLSS Details: SE 160, SE 40; about 145 feet south and 315 feet east of center of turn-in road at NW corner of NW 10
  • Location Description: Described 10/13/60 as Clarksdale SIL (257A) in Christian County
  • Map Unit: 17A—Keomah 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-E3—Taylorville, 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 #: 1
  • Correlated Information:
  • Soil Name - Clarksdale
  • PSC - 30 to 80 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 - 12/29/2009
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

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

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 12/29/2009 (entry creation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • 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

    Bt1

    Bt2

    Btg1

    Btg2

    Btg3

    Btkg

    Cg1

    Cg2

    0

    18

    30

    38

    51

    66

    84

    99

    124

    140

    18

    30

    38

    51

    66

    84

    99

    124

    140

    165

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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

    Bt1

    Bt2

    Btg1

    Btg2

    Btg3

    Btkg

    Cg1

    Cg2

    0

    18

    30

    38

    51

    66

    84

    99

    124

    140

    18

    30

    38

    51

    66

    84

    99

    124

    140

    165

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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

    Bt1

    Bt2

    Btg1

    Btg2

    Btg3

    Btkg

    Cg1

    Cg2

    0

    18

    30

    38

    51

    66

    84

    99

    124

    140

    18

    30

    38

    51

    66

    84

    99

    124

    140

    165

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

    ochric epipedon

    argillic horizon

    0—30

    30—99

    —30—

    —69—
    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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    1025

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    190

    13

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    Ap—0 to 18 centimeters (0.0 to 7.1 inches); variegated very dark gray (10YR 3/1) and very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; silt loam; weak fine granular structure; friable; common (3.0) fine pores; dark grayish brown (10YR 4/2), moist, clay depletions; fragments; moderately acid, pH 6.0; abrupt smooth boundary. Lab sample # 40A11537
    E—18 to 30 centimeters (7.1 to 11.8 inches); variegated 60 percent dark gray (10YR 4/1) and 20 percent very dark gray (10YR 3/1) and 20 percent gray (10YR 5/1), light brownish gray (10YR 6/2), dry; silt loam; weak medium platy structure; friable; 0.8 fine pores; 10 percent distinct very dark grayish brown (10YR 3/2), moist, organoargillans on all faces of peds; prominent light gray (10YR 7/1), dry, clay depletions on faces of peds and 1 percent fine distinct irregular dark yellowish brown (10YR 4/4), moist, masses of oxidized iron; fragments; strongly acid, pH 5.5; clear smooth boundary. Lab sample # 40A11538. discontinuous - phpvsfiid 1414291; discontinuous - phpvsfiid 1414291
    Bt1—30 to 38 centimeters (11.8 to 15.0 inches); brown (10YR 4/3) silty clay loam; strong fine subangular blocky, and strong medium angular blocky structure; firm; few (0.8) fine pores; distinct dark gray (10YR 4/1), moist, clay films on all faces of peds and prominent very dark gray (10YR 3/1), moist, organoargillans on all faces of peds; distinct grayish brown (10YR 5/2), moist, clay depletions on faces of peds and 1 percent fine faint irregular grayish brown (2.5Y 5/2), moist, iron depletions and 1 percent fine distinct spherical very dark brown (10YR 2/2), moist, iron-manganese concretions; fragments; moderately acid, pH 5.8; clear smooth boundary. Lab sample # 40A11539
    Bt2—38 to 51 centimeters (15.0 to 20.1 inches); brown (10YR 4/3) silty clay loam; weak medium prismatic parts to strong medium angular blocky structure; firm; many (8.0) fine pores; distinct very dark gray (10YR 3/1), moist, organoargillans on all faces of peds and distinct black (10YR 2/1), moist, organoargillans on all faces of peds and distinct very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels; 3 percent fine distinct spherical very dark grayish brown (10YR 3/2), moist, iron-manganese concretions and 3 percent fine faint irregular grayish brown (10YR 5/2), moist, iron depletions; fragments; moderately acid, pH 5.8; gradual smooth boundary. Lab sample # 40A11540
    Btg1—51 to 66 centimeters (20.1 to 26.0 inches); variegated grayish brown (2.5Y 5/2) and light olive brown (2.5Y 5/4) silty clay; moderate medium prismatic parts to moderate medium angular blocky structure; very firm; few (0.8) fine pores; distinct very dark gray (10YR 3/1), moist, and very dark grayish brown (10YR 3/2), moist, and black (10YR 2/1), moist, organoargillans on all faces of peds and distinct very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels; 3 percent fine prominent spherical very dark brown (10YR 2/2), moist, iron-manganese concretions and 25 percent medium distinct irregular dark yellowish brown (10YR 4/4), moist, masses of oxidized iron; fragments; moderately acid, pH 6.0; gradual smooth boundary. Lab sample # 40A11541
    Btg2—66 to 84 centimeters (26.0 to 33.1 inches); grayish brown (2.5Y 5/2) silty clay loam; strong medium prismatic parts to moderate medium angular blocky structure; very firm; few (0.8) fine pores; prominent black (10YR 2/1), moist, organoargillans on vertical faces of peds and distinct very dark gray (10YR 3/1), moist, organoargillans on all faces of peds and distinct very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels; 3 percent fine prominent spherical very dark brown (10YR 2/2), moist, iron-manganese concretions and 25 percent fine distinct irregular yellowish brown (10YR 5/4), moist, masses of oxidized iron; fragments; slightly alkaline, pH 7.5; clear smooth boundary. Lab sample # 40A11542
    Btg3—84 to 99 centimeters (33.1 to 39.0 inches); grayish brown (2.5Y 5/2) silty clay loam; strong medium prismatic parts to weak medium angular blocky structure; firm; few (0.8) fine pores; prominent black (10YR 2/1), moist, organic stains on vertical faces of peds and 10 percent distinct very dark grayish brown (10YR 3/2), moist, organoargillans on all faces of peds and 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels; 3 percent fine prominent spherical very dark brown (10YR 2/2), moist, iron-manganese concretions and 25 percent medium prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron; fragments; moderately alkaline, pH 8.0; clear smooth boundary. Lab sample # 40A11543
    Btkg—99 to 124 centimeters (39.0 to 48.8 inches); grayish brown (2.5Y 5/2) silt loam; weak coarse angular blocky structure; friable; many (6.0) fine pores; prominent black (10YR 2/1), moist, and very dark gray (10YR 3/1), moist, organoargillans on vertical faces of peds and distinct very dark grayish brown (10YR 3/2), moist, organoargillans on all faces of peds and 4 percent prominent black (10YR 2/1), moist, organoargillans on surfaces along root channels and 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along pores; 3 percent fine prominent spherical very dark brown (10YR 2/2), moist, iron-manganese concretions and 25 percent medium prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron; fragments; moderately alkaline, pH 8.0; clear smooth boundary. Lab sample # 40A11544
    Cg1—124 to 140 centimeters (48.8 to 55.1 inches); variegated gray (5Y 5/1) and olive gray (5Y 5/2) silt loam; massive; friable; 3.0 fine tubular pores; prominent black (10YR 2/1), moist, organoargillans on surfaces along root channels and prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along pores; 1 percent fine prominent spherical very dark brown (10YR 2/2), moist, iron-manganese concretions and 10 percent coarse prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron; fragments. Lab sample # 40A11545
    Cg2—140 to 165 centimeters (55.1 to 65.0 inches); gray (5Y 5/1) silt loam; massive; friable; 3.0 fine tubular pores; 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along pores; prominent spherical very dark brown (10YR 2/2), moist, iron-manganese concretions and 10 percent coarse prominent irregular strong brown (7.5YR 5/8), moist, masses of oxidized iron; fragments. Lab sample # 40A11546