IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksdale
  • OSD
  • Series Extent
  • User Site ID: S1980IL095063
  • User Pedon ID: 1980IL095063
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - IL SCL
  • Lab Pedon # - 80IL095063
  • NCSS Pedon Lab Data NASIS Record ID - 21178
  • 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: 40.8860201
  • Std. Longitude: -90.0936247
  • Datum: WGS84
  • Township: 10N
  • Range: 4E
  • Section: 6
  • PLSS Details: 1,716 feet E & 660 feet S of NW corner
  • Map Unit: 257A—Clarksdale silt loam, 0 to 2 percent slopes
  • Country: US—United States
  • State: Illinois
  • County: IL095—Knox
  • 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: IL095—Knox County, Illinois
  • 7.5 Minute USGS Quad: 40090-H1—Williamsfield, Illinois

    • PEDON

  • Describers Name: Roger D. Windhorn & crew
  • Current Taxonomic Class: Fine, smectitic, mesic Mollic Endoaqualfs
  • Current Taxon Kind: taxadjunct
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: PedonPC
  • Pedon #: 63
  • Correlated Information:
  • Soil Name - Clarksdale
  • PSC - 48 to 98 cm.
  • Classificaton Date - 1/4/2010
  • Moisture Class - aquic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Clarksdale
  • PSC - 48 to 98 cm.
  • Classificaton Date - 8/1/1980
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Fine-textured Peoria Loess
  • Landscape: upland
  • Landform: ground moraine
  • Geomorphic Component Hills: side slope
  • Runoff: low
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/1/1980 (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

    E1

    E2

    Btg1

    Btg2

    BCg

    Cg

    0

    23

    33

    48

    81

    102

    168

    23

    33

    48

    81

    102

    168

    213

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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

    E1

    E2

    Btg1

    Btg2

    BCg

    Cg

    0

    23

    33

    48

    81

    102

    168

    23

    33

    48

    81

    102

    168

    213

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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

    E1

    E2

    Btg1

    Btg2

    BCg

    Cg

    0

    23

    33

    48

    81

    102

    168

    23

    33

    48

    81

    102

    168

    213

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

    ochric epipedon

    argillic horizon

    0—48

    48—102

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    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

    3

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    178

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    Ap—0 to 23 centimeters (0.0 to 9.1 inches); very dark gray (10YR 3/1), gray (10YR 5/1), dry; silt loam; moderate medium granular structure; friable; few (10.0) fine roots between peds; fragments; slightly acid, pH 6.1; clear smooth boundary. Lab sample # IL26984
    E1—23 to 33 centimeters (9.1 to 13.0 inches); grayish brown (10YR 5/2) silt loam; moderate thick platy parts to moderate very fine subangular blocky structure; friable; few (3.0) fine roots between peds; distinct very dark grayish brown (10YR 3/2), moist, organoargillans on all faces of peds; 1 percent fine distinct irregular dark brown (7.5YR 3/3), moist, iron-manganese masses with sharp boundaries in matrix; fragments; slightly acid, pH 6.4; clear smooth boundary. Lab sample # IL26985
    E2—33 to 48 centimeters (13.0 to 18.9 inches); light brownish gray (10YR 6/2) silt loam; moderate thick platy structure; friable; few (3.0) fine roots between peds; distinct very dark grayish brown (10YR 3/2), moist, organoargillans on all faces of peds; 1 percent fine prominent irregular dark brown (7.5YR 3/3), moist, iron-manganese masses with sharp boundaries in matrix; fragments; moderately acid, pH 6.0; clear smooth boundary. Lab sample # IL26986
    Btg1—48 to 81 centimeters (18.9 to 31.9 inches); dark grayish brown (10YR 4/2) silty clay loam; mottles; moderate fine subangular blocky structure; firm; few (3.0) fine roots between peds; 10 percent distinct very dark gray (10YR 3/1), moist, organoargillans on surfaces along root channels and 25 percent faint brown (10YR 4/3), moist, clay films on all faces of peds; distinct clay depletions on faces of peds and 1 percent fine prominent spherical black (5YR 2.5/1), moist, manganese coatings with sharp boundaries throughout and 10 percent fine distinct irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; moderately acid, pH 5.7; clear smooth boundary. Lab sample # IL26989, IL26988, IL26987. Horizon split for sampling: IL26987 48 to 58 cm, IL26988 58 to 69 cm, IL26989 69 to 81 cm.; continuous - phpvsfiid 1414286; continuous - phpvsfiid 1414286
    Btg2—81 to 102 centimeters (31.9 to 40.2 inches); grayish brown (2.5Y 5/2) silty clay loam; and mottles; moderate fine prismatic parts to moderate fine angular blocky structure; firm; few (0.6) fine roots between peds; 25 percent distinct very dark grayish brown (2.5Y 3/2), moist, organoargillans on vertical faces of peds; 1 percent fine prominent irregular dark brown (7.5YR 3/3), moist, iron-manganese masses with sharp boundaries throughout and 1 percent fine faint irregular olive gray (5Y 5/2), moist, iron depletions with clear boundaries in matrix and 10 percent medium prominent irregular yellowish brown (10YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; moderately acid, pH 5.6; clear smooth boundary. Lab sample # IL26990, IL26991. Horizon split for sampling: IL26990 81 to 91 cm, IL26991 91 to 102 cm.; The pH of the Btg1 horizon is too acid; continuous - phpvsfiid 1414285; continuous - phpvsfiid 1414285
    BCg—102 to 168 centimeters (40.2 to 66.1 inches); variegated olive gray (5Y 5/2) and yellowish brown (10YR 5/6) silty clay loam; mottles; weak coarse prismatic structure; firm; 0.8 roots; prominent very dark grayish brown (10YR 3/2), moist, organoargillans on surfaces along pores; 1 percent fine prominent spherical very dark brown (7.5YR 2.5/2), moist, iron-manganese concretions with sharp boundaries throughout and 1 percent fine distinct irregular yellowish brown (10YR 5/4), moist, masses of oxidized iron with diffuse boundaries in matrix; fragments; moderately acid, pH 5.8; clear smooth boundary. Lab sample # IL26992, IL26996, IL26993, IL26994, IL26995. Horizon split for sampling: IL26992 102 to 114 cm, IL26993 114 to 127 cm, IL26994 127 to 140 cm, IL26995 140 to 152 cm, IL26996 152 to 168 cm.; the pH's for the Btg and BC horizons are too acid; continuous - phpvsfiid 1414284; continuous - phpvsfiid 1414284
    Cg—168 to 213 centimeters (66.1 to 83.9 inches); light olive gray (5Y 6/2) silt loam; and mottles; structureless massive; friable; 0.8 roots; prominent very dark gray (10YR 3/1), moist, and very dark grayish brown (10YR 3/2), moist, organoargillans on surfaces along pores; 1 percent fine prominent spherical very dark brown (7.5YR 2.5/2), moist, iron-manganese concretions with sharp boundaries throughout and 1 percent fine prominent irregular yellowish brown (10YR 5/4), moist, masses of oxidized iron with diffuse boundaries in matrix and 25 percent fine prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix; fragments; moderately acid, pH 5.8. Lab sample # IL26997, IL26999, IL26998. Horizon split for sampling: IL26997 168 to 183 cm, IL26998 183 to 198 cm, IL26999 198 to 213 cm.; The pH of the Cg horizon is too acid