IDENTIFIERS

  • Current Taxon Name (Soil Name): Downs
  • OSD
  • Series Extent
  • User Site ID: 1980IL095021
  • User Pedon ID: 1980IL095021
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - IL SCL
  • Lab Pedon # - 80IL095021
  • NCSS Pedon Lab Data NASIS Record ID - 21176
  • Print Date: 6/1/2024

    • 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: 40.8321880
  • Std. Longitude: -90.1280678
  • Datum: WGS84
  • Township: 10N
  • Range: 3E
  • Section: 23
  • PLSS Details: 2350 feet W & 1000 feet N of SE corner
  • 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

    • PEDON

  • Current Taxonomic Class: Fine-silty, mixed, superactive, mesic Mollic Hapludalfs
  • Current Taxon Kind: series
  • Pedon Type: map unit inclusion
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: PedonPC
  • Pedon #: 21
  • Correlated Information:
  • Soil Name - Downs
  • PSC - 36 to 86 cm.
  • Classificaton Date - 1/4/2010
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Downs
  • PSC - 36 to 86 cm.
  • Classificaton Date - 8/1/1980
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Peoria loess
  • Landscape: upland
  • Landform: interfluve
  • Geomorphic Component Hills: side slope
  • Runoff: medium
  • Drainage Class: well
  • 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

    A2

    B1

    B21t

    B22t

    B23t

    B3

    C

    0

    18

    25

    36

    53

    76

    107

    135

    18

    25

    36

    53

    76

    107

    135

    234

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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

    A2

    B1

    B21t

    B22t

    B23t

    B3

    C

    0

    18

    25

    36

    53

    76

    107

    135

    18

    25

    36

    53

    76

    107

    135

    234

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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

    A2

    B1

    B21t

    B22t

    B23t

    B3

    C

    0

    18

    25

    36

    53

    76

    107

    135

    18

    25

    36

    53

    76

    107

    135

    234

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

    mollic epipedon

    argillic horizon

    0—25

    36—107

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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

    4

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    175

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    Ap—0 to 18 centimeters (0.0 to 7.1 inches); very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; silt loam; moderate medium granular structure; friable; 0.6 fine roots between peds; fragments; moderately acid, pH 5.8; clear smooth boundary. Lab sample # IL26948
    A2—18 to 25 centimeters (7.1 to 9.8 inches); very dark grayish brown (10YR 3/2), light brownish gray (10YR 6/2), dry; silt loam; weak thin platy structure; friable; 0.1 fine roots between peds; fragments; moderately acid, pH 5.8; clear smooth boundary. Lab sample # IL26949
    B1—25 to 36 centimeters (9.8 to 14.2 inches); dark yellowish brown (10YR 3/4) silt loam; moderate medium subangular blocky structure; friable; 0.1 fine roots between peds; fragments; strongly acid, pH 5.3; clear smooth boundary. Lab sample # IL26950
    B21t—36 to 53 centimeters (14.2 to 20.9 inches); brown (10YR 4/3) silty clay loam; moderate medium subangular blocky structure; friable; 0.6 fine roots between peds; distinct very dark grayish brown (10YR 3/2), moist, clay films on all faces of peds; fragments; very strongly acid, pH 4.7; gradual smooth boundary. Lab sample # IL26951, IL26952. Horizon split for sampling: IL26951 36 to 46 cm, IL26952 46 to 53 cm.; patchy - phpvsfiid 1466131; patchy - phpvsfiid 1466131
    B22t—53 to 76 centimeters (20.9 to 29.9 inches); dark yellowish brown (10YR 4/4) silty clay loam; moderate medium prismatic parts to moderate medium subangular blocky structure; firm; 0.1 fine roots between peds; distinct dark brown (10YR 3/3), moist, clay films on all faces of peds; fragments; very strongly acid, pH 4.7; gradual smooth boundary. Lab sample # IL26953, IL26954. Horizon split for sampling: IL26953 53 to 66 cm, IL26954 66 to 76 cm.; patchy - phpvsfiid 1466128; patchy - phpvsfiid 1466128
    B23t—76 to 107 centimeters (29.9 to 42.1 inches); dark yellowish brown (10YR 4/4) silty clay loam; weak medium prismatic parts to weak coarse subangular blocky structure; firm; 0.1 fine roots between peds; distinct brown (10YR 5/3), moist, silt coats on all faces of peds and distinct dark brown (10YR 3/3), moist, clay films on all faces of peds; fragments; strongly acid, pH 5.3; clear smooth boundary. Lab sample # IL26955, IL26956. Horizon split for sampling: IL26955 76 to 91 cm, IL26956 91 to 107 cm.; discontinuous - phpvsfiid 1466129; discontinuous - phpvsfiid 1466130; discontinuous - phpvsfiid 1466129; discontinuous - phpvsfiid 1466130
    B3—107 to 135 centimeters (42.1 to 53.1 inches); yellowish brown (10YR 5/6) silt loam; 1 percent brown (10YR 5/3) medium faint mottles; weak coarse subangular blocky structure; friable; fragments; strongly acid, pH 5.3; gradual smooth boundary. Lab sample # IL26957, IL26958. Horizon split for sampling: IL26957 107 to 119 cm, IL26958 119 to 135 cm.
    C—135 to 234 centimeters (53.1 to 92.1 inches); yellowish brown (10YR 5/6) silt loam; 1 percent brown (10YR 5/3) medium faint mottles; structureless massive; friable; fragments; strongly acid, pH 5.3. Lab sample # IL26959, IL26965, IL26960, IL26961, IL26962, IL26963, IL26964. Horizon split for sampling: IL26959 135 to 149 cm, IL26960 149 to 163 cm, IL26961 163 to 177 cm, IL26962 177 to 192 cm, IL26963 192 to 206 cm, IL26964 206 to 220 cm, IL26965 220 to 234 cm.