IDENTIFIERS

  • Current Taxon Name (Soil Name): Knobtop
  • OSD
  • Series Extent
  • User Site ID: 1996MO221024M
  • User Pedon ID: 1996MO221024
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M9622106
  • 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: 37.9661696
  • Std. Longitude: -90.9984561
  • Datum: WGS84
  • State: Missouri
  • County: MO221—Washington
  • MLRA: 116A—Ozark Highland

    • PEDON

  • Describers Name: DMS, MAC
  • Current Taxonomic Class: Fine, mixed Typic Fragiudults
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Sampled As Information:
  • Soil Name - Knobtop
  • Taxonomic Class - Fine, mixed Typic Fragiudults
  • Taxon Kind - series
  • PSC - 25 to 58 cm.
  • Classificaton Date - 3/25/1996
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: loess over pedisediment
  • Landscape: hills
  • Landform: ridge
  • Hill Slope Profile: summit
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Surface Fragments: 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 3/25/1996 (actual site observation date)
  • Air Photo ID: 11
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    fragipan

    lithic contact

    0—15

    15—58

    58—99

    99—0

    —-

    —-

    —-

    —-
    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

    —

    —

    408

    —

    0

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Oi—0 to 5 centimeters (0.0 to 2.0 inches); slightly decomposed plant material; fragments. Partially decomposed twigs, roots, and leaves.
    A—5 to 13 centimeters (2.0 to 5.1 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; silt loam; weak fine subangular blocky parts to moderate fine granular structure; friable; 6.0 very fine and fine roots and 0.5 medium and coarse roots; 3.0 very fine and fine interstitial and tubular pores; fragments; strongly acid, pH 5.1, hellige-truog; clear smooth boundary. Lab sample # MU056578
    E—13 to 20 centimeters (5.1 to 7.9 inches); yellowish brown (10YR 5/4) silt loam; moderate very fine subangular blocky structure; friable; 3.0 very fine and fine roots and 0.5 medium and coarse roots; 2.0 fine tubular pores; fragments; very strongly acid, pH 4.7, hellige-truog; clear smooth boundary. Lab sample # MU056579
    Bt1—20 to 33 centimeters (7.9 to 13.0 inches); strong brown (7.5YR 4/6) silty clay loam; moderate fine subangular blocky structure; firm; 3.0 very fine and fine roots and 0.5 medium and coarse roots; 2.0 very fine and fine tubular pores; 30 percent distinct clay films on faces of peds and 30 percent distinct skeletans on faces of peds; fragments; very strongly acid, pH 4.8, hellige-truog; gradual smooth boundary. Lab sample # MU056580. discontinuous - phpvsfiid 134295; discontinuous - phpvsfiid 134296; discontinuous - phpvsfiid 134295; discontinuous - phpvsfiid 134296
    Bt2—33 to 63 centimeters (13.0 to 24.8 inches); dark yellowish brown (10YR 4/6) silty clay; weak fine prismatic parts to moderate very fine subangular blocky structure; firm; 0.5 very fine and fine roots and 0.5 medium and coarse roots; 2.0 fine tubular pores; 30 percent distinct clay films on faces of peds; fragments; very strongly acid, pH 4.6, hellige-truog; clear smooth boundary. Lab sample # MU056581. discontinuous - phpvsfiid 134297; discontinuous - phpvsfiid 134297
    2E—63 to 81 centimeters (24.8 to 31.9 inches); light brownish gray (10YR 6/2) silt loam; 25 percent yellowish brown (10YR 5/6) medium prominent mottles; moderate fine prismatic parts to moderate very fine subangular blocky structure; firm; 0.5 very fine to coarse roots; 4.0 very fine and fine tubular pores; 30 percent distinct skeletans on faces of peds; 5 percent by volume subangular 75-162-250 millimeter unspecified fragments; very strongly acid, pH 4.7, hellige-truog; clear smooth boundary. Lab sample # MU056582. Rock fragments are igneous-felsite.; discontinuous - phpvsfiid 134298; discontinuous - phpvsfiid 134298
    2Btx—81 to 104 centimeters (31.9 to 40.9 inches); pale brown (10YR 6/3) silt loam; 10 percent dark yellowish brown (10YR 4/4) medium faint mottles; moderate fine platy parts to moderate very fine subangular blocky structure; friable; 0.5 very fine to coarse roots; 0.5 very fine and fine tubular pores; 30 percent distinct skeletans on faces of peds; 1 percent fine spherical iron-manganese masses between peds; 10 percent by volume subangular 75-162-250 millimeter unspecified fragments; very strongly acid, pH 4.6, hellige-truog; abrupt smooth boundary. Lab sample # MU056583. Rock fragments are igneous-felsite.; discontinuous - phpvsfiid 134299; discontinuous - phpvsfiid 134299
    2R—104 to 208 centimeters (40.9 to 81.9 inches); bedrock; fragments. Hard igneous felsite.