IDENTIFIERS

  • Current Taxon Name (Soil Name): Twichell
  • OSD
  • Series Extent
  • User Site ID: S1984OK139005
  • User Pedon ID: S1984OK139005
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 84P0671
  • NCSS Pedon Lab Data NASIS Record ID - 54915
  • Print Date: 2/16/2025

    • 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: 36.7733345
  • Std. Longitude: -101.1675034
  • Datum: WGS84
  • Township: 4N
  • Range: 18E
  • Section: 31
  • PLSS Details: 347 meters S and 40 meters E of NW corner
  • Location Description: Texas County, Oklahoma.
  • State: Oklahoma
  • County: OK139—Texas
  • MLRA: 77—Southern High Plains

    • PEDON

  • Describers Name: JW Frie, BJ Wagner, EL Cole, GA Sample, CR Cail
  • Current Taxonomic Class: Fine, mixed, superactive, mesic Aridic Haplusterts
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: research site
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 5
  • Correlated Information:
  • Soil Name - Twichell
  • PSC - 25 to 100 cm.
  • Classificaton Date - 1/22/2009
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - ustic
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Richfield
  • Classificaton Date - 7/1/1984
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: upland
  • Landform: plain
  • Hill Slope Profile: summit
  • Slope Shape Down: linear
  • Runoff: very low
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/1/1984 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    Bss1

    Bss2

    Bkss

    Bk

    BCk

    2Btk1

    2Btk2

    2Btk3

    18

    32

    49

    64

    97

    136

    160

    200

    32

    49

    64

    97

    136

    160

    200

    228

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    Bss1

    Bss2

    Bkss

    Bk

    BCk

    2Btk1

    2Btk2

    2Btk3

    18

    32

    49

    64

    97

    136

    160

    200

    32

    49

    64

    97

    136

    160

    200

    228

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    Bss1

    Bss2

    Bkss

    Bk

    BCk

    2Btk1

    2Btk2

    2Btk3

    18

    32

    49

    64

    97

    136

    160

    200

    32

    49

    64

    97

    136

    160

    200

    228

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

    mollic epipedon

    slickensides

    secondary carbonates

    lithologic discontinuity

    0—32

    9—64

    49—

    136—

    —32—

    —-

    —-

    —-
    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

    1

    —

    —

    886

    —

    90

    44

    —

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    14

    26

    24

    15

    27

    3

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    004298

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    Ap—0 to 9 centimeters (0.0 to 3.5 inches); brown (10YR 5/3) interior, dark brown (10YR 3/3) interior, moist; silty clay loam; 36 percent clay; weak fine granular structure; hard, friable; fragments; slightly alkaline, pH 7.6, hellige-truog; abrupt smooth boundary. Lab sample # 84P03711
    Bss—9 to 18 centimeters (3.5 to 7.1 inches); dark grayish brown (10YR 4/2) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay; 41 percent clay; strong medium angular blocky structure; extremely hard, firm; 55 percent gibbsite coats on vertical faces of peds and 55 percent distinct slickensides (pedogenic); fragments; neutral, pH 7.0, hellige-truog; abrupt irregular boundary. Lab sample # 84P03712. many gibbsite coats surface features on vertical faces of peds; continuous - phpvsfiid 443554; continuous - phpvsfiid 378830; continuous - phpvsfiid 443554; continuous - phpvsfiid 378830
    Bss1—18 to 32 centimeters (7.1 to 12.6 inches); dark grayish brown (10YR 4/2) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay; 41 percent clay; strong coarse prismatic, and strong medium angular blocky structure; extremely hard, very firm; 10 reversible trans-horizon cracks per meter with a width of 1 cm that extend above the horizon; 55 percent gibbsite coats on vertical faces of peds and 55 percent clay films on all faces of peds and 55 percent distinct slickensides (pedogenic); fragments; moderately alkaline, pH 8.2, hellige-truog; clear smooth boundary. Lab sample # 84P03713. Many cracks up to 1 cm wide.; many gibbsite coats surface features on vertical faces of peds; many clay films surface features on vertical and horizontal faces of peds; continuous - phpvsfiid 443539; continuous - phpvsfiid 378831; continuous - phpvsfiid 378832; continuous - phpvsfiid 443539; continuous - phpvsfiid 378831; continuous - phpvsfiid 378832
    Bss2—32 to 49 centimeters (12.6 to 19.3 inches); brown (10YR 5/3) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay loam; 37 percent clay; strong coarse prismatic, and strong medium angular blocky structure; extremely hard, very firm; 10 reversible trans-horizon cracks per meter with a width of 1 cm that extend below the horizon; 55 percent gibbsite coats on vertical faces of peds and 55 percent clay films on all faces of peds and 55 percent distinct slickensides (pedogenic); fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, hellige-truog; clear smooth boundary. Lab sample # 84P03714. Many cracks up to 1 cm wide.; many gibbsite coats surface features on vertical faces of peds; many clay films surface features on vertical and horizontal faces of peds; effervescence is continuous; continuous - phpvsfiid 443558; continuous - phpvsfiid 378833; continuous - phpvsfiid 378834; continuous - phpvsfiid 443558; continuous - phpvsfiid 378833; continuous - phpvsfiid 378834
    Bkss—49 to 64 centimeters (19.3 to 25.2 inches); brown (10YR 5/3) interior, brown (10YR 4/3) interior, moist; silty clay loam; 37 percent clay; strong medium prismatic, and strong medium angular blocky structure; extremely hard, very firm; 15 percent gibbsite coats on vertical faces of peds and 15 percent distinct slickensides (pedogenic) and 55 percent clay films on all faces of peds; 1 percent threadlike carbonate masses; fragments; strong effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary. Lab sample # 84P03715. few very fine and fine soft masses of carbonate concentrations; few gibbsite coats surface features on vertical faces of peds; many clay films surface features on vertical and horizontal faces of peds; effervescence is continuous; continuous - phpvsfiid 443556; continuous - phpvsfiid 378835; continuous - phpvsfiid 378836; continuous - phpvsfiid 443556; continuous - phpvsfiid 378835; continuous - phpvsfiid 378836
    Bk—64 to 97 centimeters (25.2 to 38.2 inches); pale brown (10YR 6/3) interior, brown (10YR 5/3) interior, moist; silty clay loam; 33 percent clay; moderate medium prismatic, and moderate medium angular blocky structure; hard, very firm; 55 percent clay films on all faces of peds; 30 percent threadlike carbonate masses; fragments; violent effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, hellige-truog; gradual wavy boundary. Lab sample # 84P03716. many very fine and fine soft masses of carbonate concentrations; many clay films surface features on vertical and horizontal faces of peds; effervescence is continuous; continuous - phpvsfiid 378837; continuous - phpvsfiid 378837
    BCk—97 to 136 centimeters (38.2 to 53.5 inches); very pale brown (10YR 7/3) interior, pale brown (10YR 6/3) interior, moist; silty clay loam; 27 percent clay; weak coarse prismatic, and weak fine subangular blocky structure; slightly hard, friable; 1 percent threadlike carbonate masses; fragments; violent effervescence, by hcl, unspecified; strongly alkaline, pH 8.8, hellige-truog; gradual wavy boundary. Lab sample # 84P03717. few very fine and fine soft masses of carbonate concentrations; effervescence is continuous
    2Btk1—136 to 160 centimeters (53.5 to 63.0 inches); light brown (7.5YR 6/4) interior, brown (7.5YR 5/4) interior, moist; silt loam; 25 percent clay; weak coarse prismatic, and weak fine subangular blocky structure; slightly hard, firm; 55 percent clay films on all faces of peds; 1 percent fine and medium threadlike carbonate concretions; fragments; strong effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, hellige-truog; gradual wavy boundary. Lab sample # 84P03718. few fine and medium carbonate concretions concentrations; many clay films surface features on vertical and horizontal faces of peds; effervescence is continuous; continuous - phpvsfiid 378838; continuous - phpvsfiid 378838
    2Btk2—160 to 200 centimeters (63.0 to 78.7 inches); brown (7.5YR 5/4) interior, brown (7.5YR 4/4) interior, moist; loam; 24 percent clay; weak coarse prismatic, and weak fine subangular blocky structure; soft, friable; 55 percent clay films on all faces of peds; 1 percent fine and medium threadlike carbonate concretions; fragments; strong effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, hellige-truog; gradual wavy boundary. Lab sample # 84P03719. few fine and medium carbonate concretions concentrations; many clay films surface features on vertical and horizontal faces of peds; effervescence is continuous; continuous - phpvsfiid 378839; continuous - phpvsfiid 378839
    2Btk3—200 to 228 centimeters (78.7 to 89.8 inches); brown (7.5YR 5/4) interior, brown (7.5YR 4/4) interior, moist; loam; 25 percent clay; weak coarse prismatic, and weak fine subangular blocky structure; soft, friable; 55 percent clay films on all faces of peds; 1 percent fine and medium threadlike carbonate concretions; fragments; strong effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, hellige-truog. Lab sample # 84P03720. few fine and medium carbonate concretions concentrations; many clay films surface features on vertical and horizontal faces of peds; effervescence is continuous; continuous - phpvsfiid 378840; continuous - phpvsfiid 378840