IDENTIFIERS

  • Current Taxon Name (Soil Name): Twichell
  • OSD
  • Series Extent
  • Local Phase: silty clay loam
  • User Site ID: S1992OK139002
  • User Pedon ID: S1992OK139002
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 93P0111
  • NCSS Pedon Lab Data NASIS Record ID - 65455
  • Print Date: 11/12/2024

    • 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: 36.7975006
  • Std. Longitude: -101.0177765
  • Datum: WGS84
  • Township: 4N
  • Range: 19E
  • Section: 21
  • PLSS Details: 150 feet S and 280 feet SW of center
  • Country: US—United States
  • State: Oklahoma
  • County: OK139—Texas
  • MLRA: 77A—Southern High Plains, Northern Part
  • MLRA Soil Survey Area: SC-WOD—Woodward, Oklahoma
  • Non-MLRA Soil Survey Area: OK139—Texas County, Oklahoma
  • 7.5 Minute USGS Quad: 36101-G1—Adams, Oklahoma

    • PEDON

  • Describers Name: Carolyn Olson, Greg Scott, Steve Graber, Steve Alspach, Paul Finnell
  • Current Taxonomic Class: Fine, mixed, superactive, mesic Aridic Haplusterts
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - Twichell
  • PSC - 25 to 100 cm.
  • Classificaton Date - 2/13/2008
  • Classifier - Steven McGowen
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Richfield
  • Classificaton Date - 9/29/1992
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: not reviewed


    • SITE

  • Parent Material: silty and clayey loess
  • Landscape: High plains
  • Landform: loess plain
  • Slope Shape Down: linear
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/29/1992 (actual site observation date)
  • Air Photo ID: 60
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • 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 % % % % % % % % % % % % %

    Bt

    Btk1

    Btk2

    Btk3

    Btk4

    Btk5

    2Btkb

    2Bkb1

    2Bkb2

    16

    34

    87

    120

    153

    170

    180

    202

    224

    34

    87

    120

    153

    170

    180

    202

    224

    241

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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

    Bt

    Btk1

    Btk2

    Btk3

    Btk4

    Btk5

    2Btkb

    2Bkb1

    2Bkb2

    16

    34

    87

    120

    153

    170

    180

    202

    224

    34

    87

    120

    153

    170

    180

    202

    224

    241

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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 %

    Bt

    Btk1

    Btk2

    Btk3

    Btk4

    Btk5

    2Btkb

    2Bkb1

    2Bkb2

    16

    34

    87

    120

    153

    170

    180

    202

    224

    34

    87

    120

    153

    170

    180

    202

    224

    241

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    15

    6

    11

    9

    3

    5

    38

    47

    34

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

    mollic epipedon

    secondary carbonates

    calcic horizon

    0—34

    34—241

    202—241

    —34—

    —207—

    —39—
    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

    0

    —

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    856

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    440

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    14

    26

    1

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    Ap—0 to 16 centimeters (0.0 to 6.3 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay loam; moderate fine subangular blocky parts to moderate medium granular structure; slightly hard, friable; 3.0 medium roots throughout; 0.5 fine moderate-continuity interstitial and tubular pores; fragments; noneffervescent; abrupt smooth boundary. Lab sample # 93P00907
    Bt—16 to 34 centimeters (6.3 to 13.4 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay; moderate fine and medium subangular blocky structure; slightly hard, friable; 0.5 fine and medium roots in cracks; 0.5 fine moderate-continuity interstitial and tubular pores; 10 percent faint clay films on horizontal faces of peds; fragments; noneffervescent; clear smooth boundary. Lab sample # 93P00908. discontinuous - phpvsfiid 378853; discontinuous - phpvsfiid 378853
    Btk1—34 to 87 centimeters (13.4 to 34.3 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay loam; moderate medium prismatic parts to moderate medium subangular blocky structure; hard, firm; 0.5 fine roots in cracks; 0.5 fine moderate-continuity interstitial and tubular pores; 30 percent faint clay films on horizontal faces of peds; fragments; slight effervescence; clear smooth boundary. Lab sample # 93P00909. discontinuous - phpvsfiid 378854; discontinuous - phpvsfiid 378854
    Btk2—87 to 120 centimeters (34.3 to 47.2 inches); grayish brown (10YR 5/2), dark grayish brown (10YR 4/2), moist; silty clay loam; moderate medium prismatic parts to moderate medium subangular blocky structure; hard, firm; 0.5 fine roots in cracks; 3.0 very fine moderate-continuity interstitial and tubular and 0.5 fine moderate-continuity interstitial and tubular pores; 30 percent distinct dark grayish brown (10YR 4/2) clay films on all faces of peds and 30 percent distinct very dark grayish brown (10YR 3/2) organic stains in root channels and/or pores; 1 percent fine cylindrical carbonate threads and 3 percent fine irregular carbonate masses; fragments; strong effervescence; gradual smooth boundary. Lab sample # 93P00910. discontinuous - phpvsfiid 378855; discontinuous - phpvsfiid 378856; discontinuous - phpvsfiid 378855; discontinuous - phpvsfiid 378856
    Btk3—120 to 153 centimeters (47.2 to 60.2 inches); light brownish gray (10YR 6/2), grayish brown (10YR 5/2), moist; silty clay loam; moderate medium prismatic parts to moderate medium subangular blocky structure; hard, firm; 0.5 fine roots in cracks; 0.5 fine moderate-continuity interstitial and tubular pores; 30 percent distinct clay films on all faces of peds and 30 percent distinct organic stains in root channels and/or pores; 3 percent fine cylindrical carbonate threads and 3 percent fine irregular carbonate masses; fragments; strong effervescence; gradual smooth boundary. Lab sample # 93P00911. few fine shells that look like snail shells; discontinuous - phpvsfiid 378857; discontinuous - phpvsfiid 378858; discontinuous - phpvsfiid 378857; discontinuous - phpvsfiid 378858
    Btk4—153 to 170 centimeters (60.2 to 66.9 inches); light brownish gray (10YR 6/2), grayish brown (10YR 5/2), moist; silty clay loam; moderate medium prismatic parts to moderate medium subangular blocky structure; hard, firm; 0.5 fine roots in cracks; 0.5 fine moderate-continuity interstitial and tubular pores; 10 percent faint clay films on all faces of peds and 30 percent distinct dark grayish brown (10YR 4/2) organic stains in root channels and/or pores; 3 percent fine cylindrical carbonate threads; fragments; strong effervescence; gradual smooth boundary. Lab sample # 93P00912. discontinuous - phpvsfiid 378859; discontinuous - phpvsfiid 378860; discontinuous - phpvsfiid 378859; discontinuous - phpvsfiid 378860
    Btk5—170 to 180 centimeters (66.9 to 70.9 inches); pale brown (10YR 6/3), brown (10YR 5/3), moist; clay loam; moderate medium prismatic parts to moderate fine subangular blocky structure; hard, firm; 21.0 very fine moderate-continuity interstitial and tubular and 0.5 fine moderate-continuity interstitial and tubular pores; 30 percent distinct clay films on all faces of peds; 3 percent fine cylindrical carbonate threads; fragments; strong effervescence; clear smooth boundary. Lab sample # 93P00913. discontinuous - phpvsfiid 378861; discontinuous - phpvsfiid 378861
    2Btkb—180 to 202 centimeters (70.9 to 79.5 inches); brown (7.5YR 5/4), brown (7.5YR 4/4), moist; clay loam; moderate medium prismatic parts to moderate fine subangular blocky structure; hard, firm; 0.5 very fine and fine interstitial and tubular pores; 30 percent distinct clay films on all faces of peds; 1 percent fine cylindrical carbonate threads and 1 percent fine and medium spherical carbonate masses; fragments; slight effervescence; clear smooth boundary. Lab sample # 93P00914. discontinuous - phpvsfiid 378862; discontinuous - phpvsfiid 378862
    2Bkb1—202 to 224 centimeters (79.5 to 88.2 inches); 60 percent very pale brown (10YR 8/2) and 40 percent light brown (7.5YR 6/4), 60 percent light gray (10YR 7/2) and 40 percent brown (7.5YR 5/4), moist; clay loam; weak medium subangular blocky structure; slightly hard, friable; 0.5 very fine and 3.0 fine pores; 60 percent coarse and very coarse cylindrical carbonate masses and 30 percent fine and medium spherical carbonate threads; fragments; violent effervescence; clear smooth boundary. Lab sample # 93P00915
    2Bkb2—224 to 241 centimeters (88.2 to 94.9 inches); 85 percent very pale brown (10YR 8/2) and 15 percent light brown (7.5YR 6/4), 85 percent light gray (10YR 7/2) and 15 percent brown (7.5YR 5/4), moist; loam; weak coarse subangular blocky structure; slightly hard, friable; 0.5 medium and 3.0 fine pores; 90 percent very coarse and extremely coarse cylindrical carbonate masses; fragments; violent effervescence; gradual smooth boundary. Lab sample # 93P00916