IDENTIFIERS

  • Current Taxon Name (Soil Name): Twichell
  • OSD
  • Series Extent
  • User Site ID: S1994TX357009
  • User Pedon ID: S1994TX357009
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 94P0662
  • NCSS Pedon Lab Data NASIS Record ID - 66835
  • Print Date: 2/16/2025

    • LOCATION

  • Location Description: Sheet 41.
  • State: Texas
  • County: TX357—Ochiltree
  • MLRA: 77A—Southern High Plains, Northern Part
  • Non-MLRA Soil Survey Area: TX357—Ochiltree County, Texas
  • 7.5 Minute USGS Quad: 36100-B8—Sourdough Creek NW, Texas

    • PEDON

  • 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 PDP 3.x
  • Pedon #: 9
  • Correlated Information:
  • Soil Name - Twichell
  • PSC - 25 to 100 cm.
  • Classificaton Date - 2/14/2008
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - udic
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Pullman
  • Classificaton Date - 7/17/1994
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/17/1994 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    lithologic discontinuity

    calcic horizon

    0—23

    91—

    193—236

    —23—

    —-

    —-
    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

    —

    —

    915

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 23 centimeters (0.0 to 9.1 inches); dark grayish brown (10YR 4/2) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay loam; weak fine and medium granular, and weak fine and medium subangular blocky structure; hard, friable, noncoherent, slightly sticky, slightly plastic; brittle; 21.0 very fine and fine roots throughout; 0.5 fine and medium low-continuity tubular pores; fragments; noneffervescent; abrupt smooth boundary. Lab sample # 94P04950; observed in auger, screw
    Bt—23 to 51 centimeters (9.1 to 20.1 inches); dark grayish brown (10YR 4/2) interior, very dark grayish brown (10YR 3/2) interior, moist; silty clay; moderate fine and medium angular blocky structure; firm, noncoherent, moderately sticky, moderately plastic; brittle; 21.0 very fine and fine roots throughout; 3.0 fine and medium moderate-continuity tubular pores; distinct very dark grayish brown (10YR 3/2), moist, clay films on faces of peds; fragments; noneffervescent; clear smooth boundary. Lab sample # 94P04951; observed in auger, screw. continuous - phpvsfiid 390089; continuous - phpvsfiid 390089
    Btk1—51 to 71 centimeters (20.1 to 28.0 inches); grayish brown (10YR 5/2) interior, dark grayish brown (10YR 4/2) interior, moist; silty clay; moderate fine and medium angular blocky structure; firm, noncoherent, moderately sticky, moderately plastic; brittle; 3.0 very fine and fine roots throughout; 3.0 fine and medium moderate-continuity tubular pores; distinct dark grayish brown (10YR 4/2), moist, clay films on faces of peds; fragments; slight effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 94P04952; observed in auger, screw. continuous - phpvsfiid 390090; continuous - phpvsfiid 390090
    Btk2—71 to 91 centimeters (28.0 to 35.8 inches); grayish brown (10YR 5/2) interior, dark grayish brown (10YR 4/2) interior, moist; firm, noncoherent, moderately sticky; brittle; 0.5 very fine and fine roots throughout; 3.0 fine and medium moderate-continuity tubular pores; 65 percent distinct dark grayish brown (10YR 4/2), moist, clay films on faces of peds; 2 percent fine spherical noncoherent cemented very pale brown (10YR 8/2) carbonate threads throughout; fragments; strong effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 94P04953; observed in auger, screw. patchy - phpvsfiid 390091; patchy - phpvsfiid 390091
    Btkb1—91 to 147 centimeters (35.8 to 57.9 inches); brown (7.5YR 5/4) interior, brown (7.5YR 4/4) interior, moist; silty clay loam; moderate coarse prismatic parts to moderate fine and medium subangular blocky structure; friable, noncoherent, slightly sticky, slightly plastic; brittle; 3.0 very fine and fine moderate-continuity tubular pores; distinct 7.5YR (7.5YR) clay films on faces of peds; 5 percent fine and medium irregular noncoherent cemented very pale brown (10YR 8/2) carbonate threads between peds; fragments; slight effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 94P04954; observed in auger, screw. continuous - phpvsfiid 390092; continuous - phpvsfiid 390092
    Btkb2—147 to 193 centimeters (57.9 to 76.0 inches); reddish yellow (7.5YR 6/6) interior, 7.5YR (7.5YR/), interior, moist; silty clay loam; moderate coarse prismatic parts to moderate fine and medium subangular blocky structure; friable, noncoherent, slightly sticky, slightly plastic; brittle; 3.0 very fine and fine moderate-continuity tubular pores; distinct strong brown (7.5YR 4/6), moist, clay films on faces of peds and 2 percent distinct black (N 2/0), moist, manganese or iron-manganese stains on faces of peds and in pores; 2 percent fine threadlike noncoherent cemented very pale brown (10YR 8/2) carbonate threads; fragments; slight effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 94P04955; observed in auger, screw. continuous - phpvsfiid 390093; patchy - phpvsfiid 390094; continuous - phpvsfiid 390093; patchy - phpvsfiid 390094
    Btkb3—193 to 279 centimeters (76.0 to 109.8 inches); light brown (7.5YR 6/4) interior, strong brown (7.5YR 5/6) interior, moist; silty clay loam; moderate fine and medium subangular blocky parts to moderate fine and medium angular blocky structure; friable, noncoherent, slightly sticky, slightly plastic; brittle; 3.0 very fine and fine moderate-continuity tubular pores; faint clay films on faces of peds; 15 percent irregular noncoherent cemented pinkish white (7.5YR 8/2) carbonate nodules throughout and 10 percent fine and medium threadlike noncoherent cemented pinkish white (7.5YR 8/2) carbonate threads between peds; fragments; strong effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 94P04956; observed in auger, screw. 94P4957.; patchy - phpvsfiid 390095; patchy - phpvsfiid 390095
    Btkb4—279 to 371 centimeters (109.8 to 146.1 inches); light brown (7.5YR 6/4) interior, strong brown (7.5YR 5/6) interior, moist; silty clay loam; moderate coarse prismatic parts to moderate fine and medium angular blocky parts to moderate fine and medium subangular blocky structure; friable, slightly sticky, slightly plastic; brittle; 21.0 fine and medium moderate-continuity tubular pores; distinct brown (7.5YR 5/4), moist, clay films on faces of peds; 20 percent fine and medium threadlike noncoherent cemented pinkish gray (7.5YR 7/2) carbonate threads between peds and 15 percent fine and medium spherical noncoherent cemented pinkish white (7.5YR 8/2) carbonate nodules throughout; fragments; strong effervescence, by hcl, 1n. Lab sample # 94P04958; observed in auger, screw. 94P4959. Btkb5 146-192""""—same except visible CaCO3 2-5%, some zones more than others; clay films only on prisms.; continuous - phpvsfiid 390096; continuous - phpvsfiid 390096
    Btkb5—371 to 627 centimeters (146.1 to 246.9 inches); light brown (7.5YR 6/4) interior, brown (7.5YR 5/4) interior, moist; silty clay loam; moderate coarse prismatic parts to moderate fine and medium subangular blocky structure; friable, slightly sticky, slightly plastic; brittle; 3.0 fine and medium tubular pores; distinct brown (7.5YR 5/4), moist, clay films on faces of peds; 5 percent fine and medium threadlike noncoherent cemented pinkish white (7.5YR 8/2) carbonate threads between peds; fragments; strong effervescence, by hcl, 1n. Lab sample # 94P04960; observed in auger, screw. 94P4961. 94P4962. 94P4963.; continuous - phpvsfiid 390097; continuous - phpvsfiid 390097
    Btkb'1—627 to 724 centimeters (246.9 to 285.0 inches); pink (7.5YR 7/3) interior, strong brown (7.5YR 5/6) interior, moist; silty clay loam; moderate coarse prismatic parts to moderate fine and medium angular blocky structure; friable, slightly sticky, slightly plastic; brittle; 3.0 fine and medium tubular pores; distinct strong brown (7.5YR 5/6), moist, clay films on faces of peds; 15 percent fine and medium irregular noncoherent cemented pinkish white (7.5YR 8/2) carbonate nodules throughout; fragments; strong effervescence, by hcl, 1n. Lab sample # 94P04964; observed in auger, screw. 94P4965.; continuous - phpvsfiid 390098; continuous - phpvsfiid 390098
    Btkb'2—724 to 859 centimeters (285.0 to 338.2 inches); light brown (7.5YR 6/4) interior, brown (7.5YR 5/4) interior, moist; silty clay loam; weak fine and medium subangular blocky structure; friable, slightly sticky, slightly plastic; brittle; 21.0 fine and medium tubular pores; 2 percent fine and medium irregular noncoherent cemented pinkish white (7.5YR 8/2) carbonate nodules throughout; fragments; strong effervescence, by hcl, 1n. Lab sample # 94P04966; observed in auger, screw. 94P4967.