IDENTIFIERS

  • Current Taxon Name (Soil Name): Niangua
  • OSD
  • Series Extent
  • User Site ID: 1991MO141021
  • User Pedon ID: 1991MO141021
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Print Date: 12/6/2025

    • 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: 38.2658848
  • Std. Longitude: -92.8721273
  • Datum: WGS84
  • State: Missouri
  • County: MO141—Morgan
  • MLRA: 116A—Ozark Highland

    • PEDON

  • Describers Name: DWW,DEV,TOK
  • Current Taxonomic Class: Very-fine, mixed Typic Hapludalfs
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Sampled As Information:
  • Soil Name - Niangua
  • Taxonomic Class - Very-fine, mixed Typic Hapludalfs
  • Taxon Kind - series
  • PSC - 23 to 74 cm.
  • Classificaton Date - 11/26/1991
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: residuum and/or slope alluvium
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Drainage Class: well
  • Surface Fragments: 2.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/26/1991 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, lithic

    —

    140 -

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

    ochric epipedon

    argillic horizon

    lithic contact

    0—23

    23—140

    140—

    —-

    —-

    —-
    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

    30

    —

    —

    265

    —

    300

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 5 centimeters (0.0 to 2.0 inches); dark grayish brown (10YR 4/2), light brownish gray (10YR 6/2), dry; very gravelly silt loam; weak fine granular structure; friable; 3.0 fine to coarse roots throughout; 6.0 very fine and fine vesicular pores; 40 percent by volume nonflat subangular indurated 2-39-75 millimeter limestone, cherty fragments; strongly acid, pH 5.4, hellige-truog; abrupt smooth boundary.
    E—5 to 28 centimeters (2.0 to 11.0 inches); brown (10YR 5/3) very gravelly silt loam; weak fine granular structure; friable; 3.0 fine to coarse roots throughout; 5.0 very fine and fine vesicular pores; 50 percent by volume nonflat subangular indurated 2-39-75 millimeter limestone, cherty fragments; moderately acid, pH 5.6, hellige-truog; clear smooth boundary.
    2Bt1—28 to 53 centimeters (11.0 to 20.9 inches); red (2.5YR 4/8) clay; moderate fine and medium subangular blocky structure; firm; 1.0 medium roots throughout; 3.0 very fine and fine vesicular pores; 10 percent prominent dark reddish gray (5YR 4/2) clay films on faces of peds; 10 percent by volume nonflat subangular indurated 2-39-75 millimeter limestone, cherty fragments; moderately acid, pH 5.6, hellige-truog; clear smooth boundary. continuous - phpvsfiid 127371; continuous - phpvsfiid 127371
    2Bt2—53 to 81 centimeters (20.9 to 31.9 inches); red (2.5YR 4/6) clay; moderate fine and medium subangular blocky structure; firm; 1.0 medium roots throughout; 2.0 very fine and fine vesicular pores; 15 percent prominent dark reddish gray (5YR 4/2) clay films on faces of peds; 10 percent by volume nonflat subangular indurated 2-39-75 millimeter limestone, cherty fragments; strongly acid, pH 5.4, hellige-truog; gradual smooth boundary. continuous - phpvsfiid 126575; continuous - phpvsfiid 126575
    2Bt3—81 to 140 centimeters (31.9 to 55.1 inches); red (2.5YR 4/6) gravelly clay; moderate fine and medium subangular blocky structure; firm; 3.0 very fine and fine vesicular pores; 10 percent prominent dark reddish gray (5YR 4/2) clay films on faces of peds; 1 percent medium irregular noncoherent cemented light brown (7.5YR 6/4) masses of oxidized iron throughout and 25 percent medium irregular noncoherent cemented yellowish brown (10YR 5/8) masses of oxidized iron throughout; 20 percent by volume nonflat subangular indurated 2-39-75 millimeter limestone, cherty fragments; neutral, pH 7.0, hellige-truog; abrupt wavy boundary. continuous - phpvsfiid 126581; continuous - phpvsfiid 126581
    2R—140 centimeters (55.1 inches); bedrock; fragments.