IDENTIFIERS

  • Current Taxon Name (Soil Name): Twichell
  • OSD
  • Series Extent
  • User Site ID: S1994TX357004
  • User Pedon ID: S1994TX357004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 94P0657
  • NCSS Pedon Lab Data NASIS Record ID - 66830
  • 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: 36.3730240
  • Std. Longitude: -100.9177094
  • Datum: WGS84
  • Location Description: 2 miles west and 0.8 miles north of Lord intersection with Route 15. Field sheet 15.
  • State: Texas
  • County: TX357—Ochiltree
  • Non-MLRA Soil Survey Area: TX357—Ochiltree County, Texas
  • 7.5 Minute USGS Quad: 36100-C8—Farnsworth, 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 #: 4
  • 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 - 9/30/1994
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: plains
  • Landform: plain
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/30/1994 (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—44

    121—

    154—209

    —44—

    —-

    —-
    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

    —

    —

    908

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Apd—0 to 12 centimeters (0.0 to 4.7 inches);, dark brown (7.5YR 3/2), moist; silty clay loam; moderate fine and medium subangular blocky structure; 0.5 medium roots and 3.0 fine roots; 0.5 very fine vesicular pores; fragments; clear smooth boundary. Lab sample # 94P04859; observed in auger, screw
    Bt1—12 to 44 centimeters (4.7 to 17.3 inches);, dark brown (7.5YR 3/2), moist; silty clay loam; moderate medium prismatic parts to moderate fine and medium angular blocky structure; 0.5 medium roots and 3.0 fine roots; 0.5 very fine vesicular and 3.0 fine vesicular pores; 65 percent distinct clay films on all faces of peds; 1 percent carbonate concretions; fragments; slight effervescence; gradual smooth boundary. Lab sample # 94P04860; observed in auger, screw
    Bt2—44 to 75 centimeters (17.3 to 29.5 inches);, dark brown (7.5YR 3/3), moist; silty clay loam; moderate medium prismatic parts to moderate fine and medium angular blocky structure; 3.0 fine roots; 0.5 very fine vesicular and 3.0 fine vesicular pores; 50 percent distinct clay films on all faces of peds; 1 percent fine carbonate concretions; fragments; strong effervescence; clear smooth boundary. Lab sample # 94P04861; observed in auger, screw
    Btk1—75 to 98 centimeters (29.5 to 38.6 inches);, brown (7.5YR 4/4), moist; silty clay loam; weak medium prismatic parts to moderate medium subangular blocky structure; 0.5 very fine and fine roots; 0.5 very fine vesicular pores; 50 percent distinct clay films on all faces of peds; 1 percent carbonate threads and 1 percent fine carbonate nodules; fragments; strong effervescence; gradual smooth boundary. Lab sample # 94P04862; observed in auger, screw
    Btk2—98 to 121 centimeters (38.6 to 47.6 inches);, brown (7.5YR 4/4), moist; silty clay loam; weak medium prismatic parts to moderate medium subangular blocky structure; 0.5 very fine roots; 0.5 medium vesicular and 3.0 fine vesicular pores; 10 percent faint clay films; 21 percent carbonate threads and 1 percent fine carbonate nodules; fragments; violent effervescence; abrupt smooth boundary. Lab sample # 94P04863; observed in auger, screw
    2Ab—121 to 138 centimeters (47.6 to 54.3 inches);, dark brown (7.5YR 3/2), moist; silt loam; weak fine and medium subangular blocky parts to moderate fine granular structure; 0.5 very fine roots; 21.0 very fine vesicular and 3.0 fine and medium vesicular pores; 1 percent fine carbonate nodules; fragments; strong effervescence; abrupt smooth boundary. Lab sample # 94P04864; observed in auger, screw
    2Btkb—138 to 154 centimeters (54.3 to 60.6 inches);, brown (7.5YR 5/4), moist; silty clay loam; moderate medium prismatic parts to moderate medium subangular blocky structure; 0.5 very fine roots; 3.0 very fine and fine vesicular pores; 40 percent clay films on all faces of peds; 3 percent carbonate threads; fragments; strong effervescence; clear smooth boundary. Lab sample # 94P04865; observed in auger, screw. discontinuous - phpvsfiid 390035; discontinuous - phpvsfiid 390035
    2Bkb—154 to 185 centimeters (60.6 to 72.8 inches);, pink (7.5YR 7/4), moist; silt loam; weak coarse prismatic structure; 0.5 very fine roots; 0.5 very fine vesicular and 21.0 fine vesicular pores; 7 percent fine and medium carbonate nodules; fragments; violent effervescence; gradual smooth boundary. Lab sample # 94P04866; observed in auger, screw
    2Bk2b—185 to 209 centimeters (72.8 to 82.3 inches);, light brown (7.5YR 6/4), moist; silt loam; weak medium prismatic parts to weak fine and medium subangular blocky structure; 0.5 fine and medium vesicular pores; 21 percent carbonate threads; fragments; violent effervescence; clear smooth boundary. Lab sample # 94P04867; observed in auger, screw
    2Bk3b—209 to 263 centimeters (82.3 to 103.5 inches);, reddish yellow (7.5YR 6/6), moist; silty clay loam; moderate medium prismatic parts to moderate fine and medium subangular blocky structure; 3.0 very fine and fine vesicular and 0.5 medium vesicular pores; 21 percent fine carbonate masses and 1 percent medium carbonate nodules; fragments; violent effervescence; gradual smooth boundary. Lab sample # 94P04868; observed in auger, screw
    2Btk2b—263 to 312 centimeters (103.5 to 122.8 inches);, strong brown (7.5YR 4/6), moist; silty clay loam; moderate medium prismatic parts to moderate fine and medium subangular blocky structure; 0.5 very fine and fine vesicular pores; 10 percent black stains on faces of peds and 40 percent distinct clay films on all faces of peds; 1 percent carbonate threads and 1 percent fine and medium carbonate nodules and 21 percent medium carbonate masses; fragments; strong effervescence; clear smooth boundary. Lab sample # 94P04869; observed in auger, screw
    2Bk4b—312 to 342 centimeters (122.8 to 134.6 inches);, pink (7.5YR 7/4), moist; silty clay loam; weak medium prismatic parts to weak fine subangular blocky structure; 0.5 very fine and fine vesicular pores; 3 percent fine and medium carbonate nodules; fragments; violent effervescence; clear smooth boundary. Lab sample # 94P04870; observed in auger, screw
    3Bkb—342 to 407 centimeters (134.6 to 160.2 inches);, brown (7.5YR 5/4), moist; silty clay loam; moderate medium prismatic parts to weak medium subangular blocky structure; 0.5 very fine vesicular and 3.0 fine vesicular pores; 15 percent distinct clay films on vertical faces of peds; 3 percent fine carbonate nodules and 3 percent fine carbonate masses and 1 percent medium carbonate masses; fragments; violent effervescence; gradual smooth boundary. Lab sample # 94P04871; observed in auger, screw
    3Bk2b—407 to 454 centimeters (160.2 to 178.7 inches);, reddish yellow (7.5YR 6/6), moist; silty clay loam; moderate medium prismatic parts to weak medium subangular blocky structure; 0.5 very fine vesicular pores; 10 percent black stains and 15 percent distinct clay films on vertical faces of peds; 3 percent fine carbonate masses and 1 percent fine and medium carbonate nodules; fragments; violent effervescence; clear smooth boundary. Lab sample # 94P04872; observed in auger, screw. patchy - phpvsfiid 390039; patchy - phpvsfiid 390039
    3Bk3b—454 to 569 centimeters (178.7 to 224.0 inches);, light brown (7.5YR 6/4), moist; silty clay loam; weak medium prismatic parts to weak medium subangular blocky structure; 10 percent black stains; 1 percent fine carbonate nodules and 3 percent fine and medium carbonate masses; fragments; violent effervescence; gradual smooth boundary. Lab sample # 94P04873; observed in auger, screw. Sample compressed in tube.
    3Btkb—569 to 605 centimeters (224.0 to 238.2 inches);, brown (7.5YR 5/4), moist; silt loam; weak medium prismatic parts to fine and medium subangular blocky structure; 0.5 very fine vesicular and 3.0 fine vesicular pores; 10 percent black stains and 15 percent distinct clay films on vertical faces of peds; 3 percent fine carbonate nodules and 1 percent medium carbonate nodules; fragments; violent effervescence. Lab sample # 94P04874; observed in auger, screw. patchy - phpvsfiid 390042; patchy - phpvsfiid 390042
    3Btk2b—605 to 668 centimeters (238.2 to 263.0 inches);, brown (7.5YR 5/4), moist; silty clay loam; moderate medium prismatic parts to weak medium subangular blocky structure; 3.0 very fine and fine pores; 10 percent manganese or iron-manganese stains and 20 percent distinct clay films on vertical faces of peds; 1 percent fine carbonate masses and 3 percent fine and medium carbonate nodules; fragments; violent effervescence; gradual smooth boundary. Lab sample # 94P04875; observed in auger, screw. patchy - phpvsfiid 390044; patchy - phpvsfiid 390044
    3Bk4b—668 to 714 centimeters (263.0 to 281.1 inches);, brown (7.5YR 5/4), moist; loam; weak coarse prismatic structure; 0.5 very fine and fine pores; 1 percent fine carbonate masses; fragments; violent effervescence; clear smooth boundary. Lab sample # 94P04876; observed in auger, screw
    3Bk5b—714 to 762 centimeters (281.1 to 300.0 inches);, brown (7.5YR 5/4), moist; clay loam; moderate coarse prismatic structure; 3.0 very fine vesicular and 0.5 fine vesicular pores; 10 percent black stains; 3 percent fine carbonate threads; fragments; violent effervescence. Lab sample # 94P04877; observed in auger, screw. Stopped—running out of equipment.