IDENTIFIERS

  • Current Taxon Name (Soil Name): Knobtop
  • OSD
  • Series Extent
  • User Site ID: 1988MO123003M
  • User Pedon ID: 1988MO123003M
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M8812303
  • NCSS Pedon Lab Data NASIS Record ID - 28112
  • Print Date: 11/21/2024

    • 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: 37.4874153
  • Std. Longitude: -90.3475266
  • Datum: WGS84
  • Township: T32N
  • Range: R6E
  • Section: 2
  • PLSS Details: 2700 feet N and 1750 feet W of the SE corner
  • Location Description: 2700 ft. N. and 1750 ft. W. of the SE corner of sec. 2, T. 32 N., R. 6 E.
  • Map Unit: 77004—Irondale gravelly silt loam, 15 to 35 percent slopes, rocky, extremely bouldery42F—Irondale stony silt loam, 15 to 40 percent slopes, extremely stony
  • State: Missouri
  • County: MO123—Madison
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO123—Madison County, Missouri
  • 7.5 Minute USGS Quad: 37090-D3—Cherokee Pass, Missouri

    • PEDON

  • Describers Name: RM, JF, and BLB
  • Current Taxonomic Class: Fine-silty, mixed, active, mesic Aquic Hapludults
  • Current Taxon Kind: series
  • Pedon Type: map unit inclusion
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Knobtop
  • PSC - 18 to 68 cm.
  • Classificaton Date - 1/31/2012
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Knobtop
  • Taxonomic Class - Fine-silty, mixed, active, mesic Aquic Hapludults
  • Taxon Kind - series
  • PSC - 18 to 68 cm.
  • Classificaton Date - 5/17/1988
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: loess over residuum weathered from acid igneous rock
  • Landscape: mountains
  • Landform: mountain slope
  • Runoff: medium
  • Drainage Class: moderately well
  • Surface Fragments: 2.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/17/1988 (actual site observation date)
  • Air Photo ID: C-5
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, lithic

    —

    89 -

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

    ochric epipedon

    argillic horizon

    aquic conditions

    lithic contact

    0—18

    18—89

    56—89

    89—

    —-

    —-

    —-

    —-
    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

    8

    —

    —

    386

    —

    145

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 10 centimeters (0.0 to 3.9 inches); dark brown (10YR 3/3), pale brown (10YR 6/3), dry; silt loam; weak medium subangular blocky parts to moderate fine granular structure; friable; 10.0 fine and medium roots and 0.5 coarse roots; 1 percent by volume 250-425-600 millimeter unspecified fragments; very strongly acid, pH 4.5, hellige-truog; clear smooth boundary. Lab sample # MU020985
    E—10 to 18 centimeters (3.9 to 7.1 inches); yellowish brown (10YR 5/4) silt loam; weak fine and medium platy parts to moderate medium subangular blocky structure; friable; 3.0 fine and medium roots; fragments; extremely acid, pH 4.4, hellige-truog; clear smooth boundary. Lab sample # MU020986
    Bt1—18 to 41 centimeters (7.1 to 16.1 inches); strong brown (7.5YR 5/6) silty clay loam; weak medium prismatic parts to moderate medium subangular blocky structure; firm; 10.0 fine and medium roots; reddish brown (5YR 4/3) clay films; fragments; very strongly acid, pH 4.7, hellige-truog; gradual smooth boundary. Lab sample # MU020987. continuous - phpvsfiid 161885; continuous - phpvsfiid 161885
    Bt2—41 to 56 centimeters (16.1 to 22.0 inches); yellowish brown (10YR 5/6) silty clay loam; 10 percent pale brown (10YR 6/3) fine mottles; moderate medium subangular blocky structure; firm; 3.0 fine and medium roots; reddish brown (5YR 4/3) clay films; 1 percent fine and medium noncoherent cemented light brownish gray (10YR 6/2) iron depletions and 1 percent fine iron-manganese concretions; fragments; very strongly acid, pH 4.7, hellige-truog; clear smooth boundary. Lab sample # MU020988. continuous - phpvsfiid 161886; continuous - phpvsfiid 161886
    2Btg1—56 to 66 centimeters (22.0 to 26.0 inches); light brownish gray (10YR 6/2) silty clay loam; 10 percent yellowish brown (10YR 5/8) medium mottles; moderate fine and medium subangular blocky structure; firm; 3.0 medium roots; 1 percent coarse noncoherent cemented gray (10YR 6/1) iron depletions and 1 percent fine dark concretions; 13 percent by volume 75-162-250 millimeter unspecified fragments; very strongly acid, pH 4.7, hellige-truog; abrupt smooth boundary. Lab sample # MU020989
    2Btg2—66 to 89 centimeters (26.0 to 35.0 inches); gray (10YR 6/1) cobbly silt loam; 1 percent strong brown (7.5YR 5/6) medium and 1 percent light yellowish brown (2.5Y 6/4) medium and 30 percent yellowish brown (10YR 5/6) medium mottles; weak medium platy parts to moderate fine and medium subangular blocky structure; firm; 0.5 medium roots; clay films; 1 percent fine dark concretions; 1 percent by volume 2-39-75 millimeter unspecified fragments and 33 percent by volume 75-162-250 millimeter unspecified fragments; very strongly acid, pH 4.7, hellige-truog; abrupt wavy boundary. Lab sample # MU020990. continuous - phpvsfiid 161887; continuous - phpvsfiid 161887
    2R—89 centimeters (35.0 inches); bedrock; fragments.