IDENTIFIERS

  • Current Taxon Name (Soil Name): Cornwall
  • OSD
  • Series Extent
  • User Site ID: 1990MO123013M
  • User Pedon ID: 1990MO123013M
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M9012313
  • NCSS Pedon Lab Data NASIS Record ID - 31412
  • Print Date: 2/17/2025

    • 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: 37.4262772
  • Std. Longitude: -90.1787491
  • Datum: WGS84
  • Township: T32N
  • Range: R8E
  • Section: 28
  • PLSS Details: 1800 feet N and 1750 feet E of the SW corner
  • Location Description: 1800 ft. N and 1750 ft. E of the SW corner of sec. 28, T. 32 N., R. 8 E.
  • Map Unit: 28C—Cornwall silt loam, 3 to 8 percent slopes74646—Cornwall silt loam, 3 to 8 percent slopes
  • State: Missouri
  • County: MO123—Madison
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO123—Madison County, Missouri
  • 7.5 Minute USGS Quad: 37090-D2—Marquand, Missouri

    • PEDON

  • Describers Name: BLB, KEB,ERB, MLC, RDC
  • Current Taxonomic Class: Fine-silty, mixed, active, mesic Fragiaquic Paleudults
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Cornwall
  • PSC - 18 to 68 cm.
  • Classificaton Date - 3/4/2011
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Cornwall
  • Taxonomic Class - Fine-silty, mixed, active, mesic Fragiaquic Paleudults
  • Taxon Kind - series
  • PSC - 18 to 68 cm.
  • Classificaton Date - 10/23/1990
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Field Measured Properties: 55 Cation exchange capacity to clay ratio


    • SITE

  • Parent Material: loess over pedisediment over residuum
  • Landscape: plateau
  • Landform: stream terrace
  • Runoff: medium
  • Drainage Class: moderately well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/23/1990 (actual site observation date)
  • Air Photo ID: D-6
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    fragic soil properties

    0—18

    18—152

    58—114

    —-

    —-

    —-
    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

    —

    —

    192

    —

    210

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 18 centimeters (0.0 to 7.1 inches); yellowish brown (10YR 5/4), very pale brown (10YR 7/4), dry; silt loam; weak very fine granular structure; friable; 3.0 very fine and fine roots; fragments; very strongly acid, pH 4.8, hellige-truog; abrupt wavy boundary. Lab sample # MU038679. Horizon exhibited some compaction.
    Bt1—18 to 33 centimeters (7.1 to 13.0 inches); strong brown (7.5YR 5/6) silty clay loam; weak very fine subangular blocky structure; firm; 3.0 very fine and fine roots; 75 percent prominent clay films; 1 percent fine iron-manganese masses; fragments; very strongly acid, pH 4.8, hellige-truog; clear wavy boundary. Lab sample # MU038680. discontinuous - phpvsfiid 162003; discontinuous - phpvsfiid 162003
    Bt2—33 to 46 centimeters (13.0 to 18.1 inches); strong brown (7.5YR 5/6) silty clay loam; 1 percent pale brown (10YR 6/3) medium prominent mottles; moderate fine subangular blocky, and weak very fine subangular blocky structure; firm; 0.5 very fine and fine roots; 75 percent prominent clay films; fragments; very strongly acid, pH 4.8, hellige-truog; clear wavy boundary. Lab sample # MU038681. discontinuous - phpvsfiid 162004; discontinuous - phpvsfiid 162004
    Bt3—46 to 58 centimeters (18.1 to 22.8 inches); yellowish brown (10YR 5/6) silty clay loam; weak fine platy parts to moderate fine subangular blocky structure; firm; 0.5 very fine to medium roots; 35 percent prominent clay films on all faces of peds; 1 percent fine iron-manganese masses and 10 percent fine and medium noncoherent cemented light brownish gray (10YR 6/2) iron depletions; 2 percent by volume 2-39-75 millimeter unspecified fragments; very strongly acid, pH 4.7, hellige-truog; clear wavy boundary. Lab sample # MU038682. Platy structure in lower half of horizon.
    2Btx1—58 to 86 centimeters (22.8 to 33.9 inches); yellowish brown (10YR 5/6) silt loam; 1 percent yellowish brown (10YR 5/8) fine faint mottles; weak fine subangular blocky structure; firm; brittle; 0.1 very fine roots; 35 percent distinct clay films; 10 percent coarse noncoherent cemented light brownish gray (10YR 6/2) iron depletions and 10 percent fine iron-manganese masses; 1 percent by volume rounded 2-39-75 millimeter unspecified fragments; very strongly acid, pH 4.8, hellige-truog; diffuse wavy boundary. Lab sample # MU038683
    2Btx2—86 to 114 centimeters (33.9 to 44.9 inches); yellowish brown (10YR 5/6) silty clay loam; weak fine subangular blocky structure; firm; brittle; 0.1 very fine roots; 35 percent distinct clay films; 1 percent coarse noncoherent cemented grayish brown (10YR 5/2) iron depletions and 10 percent coarse noncoherent cemented light brownish gray (10YR 6/2) iron depletions and 10 percent fine and medium iron-manganese masses; fragments; very strongly acid, pH 4.8, hellige-truog; abrupt wavy boundary. Lab sample # MU038684. Few prominent patchy clay streaks; oxides are predominantly iron; wavy boundary ranges in depth from 45 to 49 inches.
    3Bt4—114 to 152 centimeters (44.9 to 59.8 inches); dark red (2.5YR 3/6) extremely gravelly clay loam; 10 percent pale brown (10YR 6/3) coarse prominent and 10 percent strong brown (7.5YR 5/6) medium prominent mottles; moderate fine subangular blocky structure; firm; 15 percent prominent clay films on lower surfaces of peds or rocks; 1 percent medium iron-manganese masses; 12 percent by volume nonflat indurated 75-162-250 millimeter limestone, cherty fragments and 50 percent by volume nonflat indurated 2-39-75 millimeter limestone, cherty fragments; very strongly acid, pH 4.6, hellige-truog. Lab sample # MU038685. Cobbly in lower half of horizon; a gray (10YR 4/2) horizontal band 3/4 inches thick was observed at the upper boundary;