IDENTIFIERS

  • Current Taxon Name (Soil Name): Darnell
  • OSD
  • Series Extent
  • User Site ID: S1992OK081001
  • User Pedon ID: 92OK081001
  • Vegetation Plot ID: S1992OK081001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 93P0390
  • NCSS Pedon Lab Data NASIS Record ID - 65733
  • Print Date: 1/31/2025

    • 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: 35.8549995
  • Std. Longitude: -97.1091690
  • Datum: WGS84
  • Township: 16N
  • Range: 2E
  • Section: 17
  • PLSS Details: 900 feet W and 100 feet N of the SE corner
  • Map Unit: DaSE—Darnell-Stephenville complex, 3 to 12 percent slopes
  • Country: US—United States
  • State: Oklahoma
  • County: OK081—Lincoln
  • MLRA: 84A—North Cross Timbers
  • Regional Office: SC—South Central
  • MLRA Soil Survey Area: SC-STW—Stillwater, Oklahoma
  • 7.5 Minute USGS Quad: 35097-G1—Carney, Oklahoma

    • PEDON

  • Describers Name: Jim Henley and Clay R. Wilson
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Darnell
  • Taxonomic Class - Loamy, siliceous, shallow Udic Ustochrepts
  • PSC - 25 to 48 cm.
  • Classificaton Date - 6/18/1992
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium derived from sandstone
  • Landscape: hills
  • Landform: hillslope
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: backslope
  • Slope Position: upper third
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/18/1992 (actual site observation date)
  • Air Photo ID: 9
  • 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
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    ANGE

    PAVI2

    SCSC

    SONU2

    Andropogon gerardii

    Panicum virgatum

    Schizachyrium scoparium

    Sorghastrum nutans

    big bluestem

    switchgrass

    little bluestem

    Indiangrass

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    ochric epipedon

    cambic horizon

    paralithic contact

    0—15

    15—31

    31—54

    —-

    —-

    —-
    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

    —

    —

    305

    —

    870

    —

    —

    16

    27

    5

    18

    29

    7

    —

    —

    1684

    —

    —
    A—0 to 15 centimeters (0.0 to 5.9 inches); 99 percent dark brown (7.5YR 3/4) broken face, 99 percent brown (7.5YR 4/4) broken face, dry; fine sandy loam; weak very fine granular structure; soft, very friable, nonsticky, nonplastic; 4.0 fine to coarse roots throughout and 6.0 fine roots throughout; 6.0 very fine and fine moderate-continuity tubular pores; fragments; clear wavy boundary. Lab sample # 93P02905
    Bw—15 to 31 centimeters (5.9 to 12.2 inches); 99 percent yellowish red (5YR 4/6) broken face, 99 percent yellowish red (5YR 5/6) broken face, dry; fine sandy loam; weak fine subangular blocky structure; hard, very friable, nonsticky, nonplastic; 4.0 very fine and fine roots throughout and 4.0 medium roots throughout and 1.0 coarse roots throughout; 6.0 very fine and fine moderate-continuity tubular pores; fragments; gradual wavy boundary. Lab sample # 93P02906
    Cr1—31 to 48 centimeters (12.2 to 18.9 inches); 99 percent dark red (2.5YR 3/6) exterior, 99 percent red (2.5YR 4/6) exterior, dry; weathered bedrock; massive; very hard, very firm; 4.0 very fine roots in cracks and 6.0 fine roots in cracks and 1.0 coarse roots in cracks; 6.0 very fine and fine moderate-continuity tubular pores; fragments; gradual smooth boundary. Lab sample # 93P02907. weathered seams up to 6 cm wide that are loamy fine sand (2.5YR 4/6) that are greater than 10 cm apart.
    Cr2—48 to 54 centimeters (18.9 to 21.3 inches); 99 percent dark red (2.5YR 3/6) exterior, 99 percent red (2.5YR 4/6) exterior, dry; unweathered bedrock; massive; very hard, very firm; fragments. Lab sample # 93P02908