IDENTIFIERS

  • Current Taxon Name (Soil Name): Poynor
  • OSD
  • Series Extent
  • User Site ID: 2003MO203002M
  • User Pedon ID: 2003MO203002M
  • Vegetation Plot ID: 2003MO203002
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M0361302
  • NCSS Pedon Lab Data NASIS Record ID - 25474
  • Print Date: 12/5/2025

    • 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: 37.1062639
  • Std. Longitude: -91.3351111
  • Datum: WGS84
  • Township: T28N
  • Range: R4W
  • Section: 12
  • PLSS Details: 2135 feet W and 755 feet N of the SE corner
  • Country: US—United States
  • State: Missouri
  • County: MO203—Shannon
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO613—Shannon County, Missouri, North & West Parts
  • 7.5 Minute USGS Quad: 37091-A3—Winona, Missouri

    • PEDON

  • Describers Name: Leon Thompson, John Horton, Michael Wyatt
  • Current Taxonomic Class: Loamy-skeletal over clayey, siliceous, semiactive, mesic Typic Paleudults
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - Poynor
  • PSC - 25 to 100 cm.
  • Classificaton Date - 3/25/2020
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Gepp
  • Taxonomic Class - Loamy-skeletal over clayey, mixed, active, mesic Typic Paleudalfs
  • Taxon Kind - series
  • PSC - 25 to 100 cm.
  • Classificaton Date - 8/24/2003
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - udic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 3


    • SITE

  • Parent Material: clayey residuum weathered from chert and/or clayey slope alluvium derived from mixed
  • Landscape: hills
  • Landform: hillslope
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: shoulder
  • Slope Position: lower third
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: negligible
  • Drainage Class: moderately well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Holocene Stage formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/24/2003 (actual site observation date)
  • Air Photo ID: 37091a3nw
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - intermixed conifers and hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion sheet
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    PIEC2

    QUAL

    ACER

    TORA2

    Pinus echinata

    Quercus alba

    Acer

    Toxicodendron radicans

    shortleaf pine

    white oak

    maple

    eastern poison ivy

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    ochric epipedon

    argillic horizon

    strongly contrasting particle size class

    0—20

    20—183

    41—

    —20—

    —163—

    —1—
    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

    37

    —

    —

    298.7

    —

    54

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 10 centimeters (0.0 to 3.9 inches); dark grayish brown (10YR 4/2) interior very gravelly silt loam; weak fine granular structure; very friable; 3.0 medium roots throughout and 3.0 fine roots throughout and 3.0 coarse roots throughout; 10.0 fine moderate-continuity vesicular pores; 45 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; clear smooth boundary. Lab sample # MU002669; observed in pit, small
    E—10 to 20 centimeters (3.9 to 7.9 inches); light brownish gray (10YR 6/2) interior gravelly silt loam; weak fine subangular blocky structure; very friable; 3.0 medium roots throughout and 3.0 fine roots throughout and 3.0 coarse roots throughout; 10.0 fine moderate-continuity tubular pores; 25 percent distinct dark grayish brown (10YR 4/2), moist, organic stains on all faces of peds; 30 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; clear smooth boundary. Lab sample # MU002670; observed in pit, small
    Bt1—20 to 41 centimeters (7.9 to 16.1 inches); 50 percent yellowish red (5YR 5/6) interior and 50 percent pinkish gray (7.5YR 6/2) interior very gravelly silt loam; moderate medium subangular blocky structure; friable; 3.0 medium roots throughout and 3.0 fine roots throughout; 10.0 medium moderate-continuity tubular and 10.0 fine moderate-continuity tubular pores; 20 percent distinct grayish brown (10YR 5/2), moist, organic stains on surfaces along root channels and 30 percent prominent red (2.5YR 4/6), moist, clay films on all faces of peds and 50 percent distinct light brownish gray (10YR 6/2), moist, silt coats on all faces of peds; 35 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; clear smooth boundary. Lab sample # MU002671; observed in pit, small
    2Bt—41 to 79 centimeters (16.1 to 31.1 inches); red (2.5YR 4/6) interior clay; strong coarse subangular blocky structure; extremely firm; 3.0 medium roots throughout and 3.0 fine roots throughout and 0.5 coarse roots throughout; 3.0 medium moderate-continuity tubular and 10.0 fine moderate-continuity vesicular pores; 40 percent faint red (2.5YR 4/6), moist, clay films on all faces of peds; 7 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; clear smooth boundary. Lab sample # MU002672; observed in pit, small
    2Bt3—79 to 124 centimeters (31.1 to 48.8 inches); red (2.5YR 4/6) interior clay; moderate medium angular blocky, and moderate medium subangular blocky structure; extremely firm; 0.5 medium roots throughout and 3.0 fine roots throughout; 3.0 fine moderate-continuity vesicular pores; 10 percent prominent yellowish red (5YR 4/6), moist, clay films on all faces of peds and 30 percent distinct weak red (10R 4/4), moist, clay films on all faces of peds and 40 percent faint red (2.5YR 4/6), moist, clay films on all faces of peds; 2 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments; clear wavy boundary. Lab sample # MU002673; observed in pit, small
    2B4—124 to 183 centimeters (48.8 to 72.0 inches); 50 percent yellowish red (5YR 5/6) interior and 50 percent red (2.5YR 4/8) interior very gravelly clay; moderate medium subangular blocky, and moderate medium prismatic structure; extremely firm; 3.0 medium roots throughout and 3.0 fine roots throughout; 3.0 very fine moderate-continuity tubular and 3.0 fine moderate-continuity tubular pores; 30 percent distinct strong brown (7.5YR 5/6), moist, silt coats on all faces of peds and 35 percent distinct red (2.5YR 4/6), moist, clay films on all faces of peds; 15 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter limestone, cherty fragments and 35 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter limestone, cherty fragments. Lab sample # MU002674; observed in pit, small