IDENTIFIERS

  • Current Taxon Name (Soil Name): Twichell
  • OSD
  • Series Extent
  • Local Phase: silty clay loam
  • User Site ID: S1987OK007007
  • User Pedon ID: S1987OK007007
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 87P0678
  • NCSS Pedon Lab Data NASIS Record ID - 59973
  • 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: 36.5611115
  • Std. Longitude: -100.6100006
  • Datum: WGS84
  • Township: 1N
  • Range: 23E
  • Section: 8
  • PLSS Details: 339 meters N and 194 meters E of SW corner
  • Location Description: Beaver County, OK.
  • Country: US—United States
  • State: Oklahoma
  • County: OK007—Beaver
  • MLRA: 77A—Southern High Plains, Northern Part
  • MLRA Soil Survey Area: SC-WOD—Woodward, Oklahoma
  • Non-MLRA Soil Survey Area: OK007—Beaver County, Oklahoma
  • 7.5 Minute USGS Quad: 36100-E5—Elmwood, Oklahoma

    • PEDON

  • Describers Name: J.Frie, B.Wagner, C.Cail, J.Ford, G.Sample
  • 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 SSL-CMS data
  • Pedon #: 7
  • Correlated Information:
  • Soil Name - Twichell
  • PSC - 25 to 100 cm.
  • Classificaton Date - 6/4/2020
  • Classifier - Steven McGowen
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Richfield
  • Classificaton Date - 7/1/1987
  • Classifier - J.Frie, B.Wagner, C.Cail, J.Ford, G.Sample
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: not reviewed


    • SITE

  • Parent Material: Pleistocene silty and clayey calcareous loess
  • Landscape: high plains
  • Landform: loess plain
  • Geomorphic Component Flats: talf
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments: 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/1/1987 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • 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 % % % % % % % % % % % % %

    3Bkk

    193

    206

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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

    3Bkk

    193

    206

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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 %

    3Bkk

    193

    206

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    42

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

    mollic epipedon

    slickensides

    secondary carbonates

    calcic horizon

    0—20

    20—76

    56—206

    193—203

    —20—

    —56—

    —150—

    —10—
    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

    —

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    865

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    90

    530

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    14

    26

    3

    15

    27

    4

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    004298

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    Ap—0 to 15 centimeters (0.0 to 5.9 inches); grayish brown (10YR 5/2) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay loam; 11 percent sand; 53 percent silt; 36 percent clay; strong fine granular structure; extremely hard, firm; 5.5 fine roots throughout; fragments; neutral, pH 7.0, hellige-truog; abrupt smooth boundary. Lab sample # 87P03626; observed in trench. many fine roots throughout
    Ad—15 to 20 centimeters (5.9 to 7.9 inches); grayish brown (10YR 5/2) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay loam; 9 percent sand; 53 percent silt; 38 percent clay; massive; extremely hard, extremely firm; 2.5 very fine and fine roots throughout; fragments; moderately alkaline, pH 8.0, hellige-truog; clear smooth boundary. Lab sample # 87P03627; observed in trench. common very fine and fine roots throughout
    Btss1—20 to 36 centimeters (7.9 to 14.2 inches); grayish brown (10YR 5/2) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay; 7 percent sand; 52 percent silt; 40 percent clay; strong medium angular blocky structure; extremely hard, extremely firm; 2.5 very fine and fine roots throughout; 15 percent prominent slickensides (pedogenic) on faces of peds and 55 percent prominent clay films on faces of peds; fragments; moderately alkaline, pH 8.0, hellige-truog; gradual smooth boundary. Lab sample # 87P03628; observed in trench. many clay films surface features on faces of peds; few intersecting slickensides surface features on faces of peds; common very fine and fine roots throughout; discontinuous - phpvsfiid 354322; continuous - phpvsfiid 354321; discontinuous - phpvsfiid 354322; continuous - phpvsfiid 354321
    Btss2—36 to 56 centimeters (14.2 to 22.0 inches); brown (10YR 5/3) interior, dark brown (10YR 3/3) interior, moist; silty clay loam; 6 percent sand; 54 percent silt; 40 percent clay; strong medium angular blocky structure; extremely hard, extremely firm; 2.5 very fine and fine roots throughout; 15 percent prominent very dark grayish brown (10YR 3/2) nonintersecting slickensides on faces of peds and 55 percent prominent clay films on faces of peds; fragments; strong effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, hellige-truog; gradual smooth boundary. Lab sample # 87P03629; observed in trench. Silty clay loam in cracks.; many clay films surface features on faces of peds; few nonintersecting slickensides surface features on faces of peds; common very fine and fine roots throughout; effervescence is continuous; discontinuous - phpvsfiid 354324; continuous - phpvsfiid 354323; discontinuous - phpvsfiid 354324; continuous - phpvsfiid 354323
    Btkss—56 to 76 centimeters (22.0 to 29.9 inches); brown (10YR 5/3) interior, dark brown (10YR 3/3) interior, moist; silty clay loam; 7 percent sand; 57 percent silt; 37 percent clay; strong medium and coarse angular blocky structure; extremely hard, extremely firm; 2.5 very fine and fine roots throughout; 2 percent distinct pressure faces on faces of peds and 55 percent prominent clay films on faces of peds; 1 percent fine cylindrical carbonate concretions; fragments; violent effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, hellige-truog; gradual wavy boundary. Lab sample # 87P03630; observed in trench. few fine carbonate concretions concentrations; many clay films surface features on faces of peds; very few pressure faces surface features on faces of peds; common very fine and fine roots throughout; effervescence is continuous; discontinuous - phpvsfiid 354326; continuous - phpvsfiid 354325; discontinuous - phpvsfiid 354326; continuous - phpvsfiid 354325
    Btk1—76 to 112 centimeters (29.9 to 44.1 inches); pale brown (10YR 6/3) interior, brown (10YR 4/3) interior, moist; silty clay loam; 8 percent sand; 57 percent silt; 35 percent clay; moderate coarse prismatic, and moderate medium subangular blocky structure; very hard, firm; 2.5 very fine and fine roots throughout; 37 percent prominent clay films on faces of peds and 55 percent prominent carbonate coats on faces of peds; 11 percent fine threadlike carbonate masses and 11 percent medium cylindrical carbonate concretions; fragments; strong effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, hellige-truog; clear wavy boundary. Lab sample # 87P03631; observed in trench. 15% by volume calcium carboante.; common medium carbonate concretions concentrations; common fine soft masses of carbonate concentrations; common clay films surface features on faces of peds; many lime or carbonate coats surface features on faces of peds; common very fine and fine roots throughout; effervescence is continuous; patchy - phpvsfiid 354327; continuous - phpvsfiid 354328; patchy - phpvsfiid 354327; continuous - phpvsfiid 354328
    Btk2—112 to 145 centimeters (44.1 to 57.1 inches); brown (7.5YR 5/4) interior, brown (7.5YR 4/4) interior, moist; silty clay loam; 10 percent sand; 54 percent silt; 36 percent clay; strong medium and coarse prismatic, and moderate medium subangular blocky structure; hard, firm; 0.1 very fine roots between peds; 37 percent distinct clay films on horizontal faces of peds and 37 percent prominent carbonate coats on faces of peds; 30 percent fine threadlike carbonate masses; fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, hellige-truog; gradual smooth boundary. Lab sample # 87P03632; observed in trench. many fine soft masses of carbonate concentrations; common clay films surface features on horizontal faces of peds; common lime or carbonate coats surface features on faces of peds; very few very fine roots between peds; effervescence is continuous; patchy - phpvsfiid 354329; continuous - phpvsfiid 354330; patchy - phpvsfiid 354329; continuous - phpvsfiid 354330
    2Btk3—145 to 168 centimeters (57.1 to 66.1 inches); reddish brown (5YR 5/4) interior, dark reddish brown (5YR 3/4) interior, moist; silty clay loam; 12 percent sand; 49 percent silt; 39 percent clay; moderate medium and coarse prismatic, and moderate medium subangular blocky structure; hard, firm; 0.1 very fine roots between peds; 15 percent distinct carbonate coats on faces of peds and 37 percent prominent clay films on faces of peds; 1 percent fine cylindrical carbonate concretions and 30 percent fine threadlike carbonate masses; fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, hellige-truog; gradual smooth boundary. Lab sample # 87P03633; observed in trench. few fine carbonate concretions concentrations; many fine soft masses of carbonate concentrations; common clay films surface features on faces of peds; few lime or carbonate coats surface features on faces of peds; very few very fine roots between peds; effervescence is continuous; discontinuous - phpvsfiid 354332; continuous - phpvsfiid 354331; discontinuous - phpvsfiid 354332; continuous - phpvsfiid 354331
    2Btk4—168 to 193 centimeters (66.1 to 76.0 inches); reddish brown (5YR 5/4) interior, reddish brown (5YR 4/4) interior, moist; silty clay loam; 21 percent sand; 45 percent silt; 34 percent clay; strong medium and coarse prismatic, and moderate medium subangular blocky structure; hard, firm; 0.1 very fine roots between peds; 37 percent distinct clay films on faces of peds; 1 percent fine threadlike carbonate masses; fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, hellige-truog; abrupt smooth boundary. Lab sample # 87P03634; observed in trench. few fine soft masses of carbonate concentrations; common clay films surface features on faces of peds; very few very fine roots between peds; effervescence is discontinuous; continuous - phpvsfiid 354333; continuous - phpvsfiid 354333
    3Bkk—193 to 206 centimeters (76.0 to 81.1 inches); pink (7.5YR 7/4) interior, light brown (7.5YR 6/4) interior, moist; silt loam; 16 percent sand; 59 percent silt; 25 percent clay; massive; very hard, friable; 55 percent prominent carbonate coats on faces of peds; 11 percent coarse cylindrical carbonate concretions and 30 percent medium cylindrical carbonate masses; fragments; violent effervescence, by hcl, unspecified; moderately alkaline, pH 8.0, hellige-truog. Lab sample # 87P03635; observed in trench. 30% by volume calcium carbonate.; many medium soft masses of carbonate concentrations; common coarse carbonate concretions concentrations; many lime or carbonate coats surface features on faces of peds; effervescence is continuous; continuous - phpvsfiid 354334; continuous - phpvsfiid 354334