IDENTIFIERS

  • Current Taxon Name (Soil Name): Houston Black
  • OSD
  • Series Extent
  • User Site ID: S08TX491002
  • User Pedon ID: S08TX491002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - TAMU
  • Lab Pedon # - S08TX491002
  • NCSS Pedon Lab Data NASIS Record ID - 45598
  • 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: 30.5853786
  • Std. Longitude: -97.2786026
  • Datum: WGS84
  • State: Texas
  • County: TX491—Williamson
  • MLRA: 86A—Texas Blackland Prairie, Northern Part
  • 7.5 Minute USGS Quad: 30097-E3—Thrall, Texas

    • PEDON

  • Describers Name: RMR, THW, PDH, JAG, Mike Reed
  • Current Taxonomic Class: Fine, smectitic, thermic Udic Haplusterts
  • Current Taxon Kind: series
  • Pedon Type: representative pedon for component
  • Pedon Purpose: research site
  • Pedon Record Orgin: PedonPC
  • Correlated Information:
  • Soil Name - Houston Black
  • PSC - 36 to 100 cm.
  • Classificaton Date - 7/23/2013
  • Classifier - Chance M. Robinson
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Houston Black
  • Classificaton Date - 12/4/2008
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 1


    • SITE

  • Parent Material: calcareous clayey residuum weathered from mudstone
  • Landscape: dissected plains
  • Landform: broad plain
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Geology: Knt formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 12/4/2008 (actual site observation date)
  • Air Photo ID:
  • 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
  • Yield Study ID -
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    slickensides

    secondary carbonates

    gypsum accumulations

    densic materials

    0—36

    36—172

    36—172

    36—204

    197—204

    —-

    —-

    —-

    —-

    —-
    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

    2

    —

    —

    154.8

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap1—0 to 15 centimeters (0.0 to 5.9 inches); dark gray (10YR 4/1), very dark gray (10YR 3/1), moist; clay; weak medium subangular blocky structure; 6.0 very fine roots throughout and 4.0 fine roots throughout; 1 percent by volume subrounded quartzite fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.7, pH meter; clear smooth boundary. Lab sample # TAMU7433; moist when described; observed in trench
    Ap2—15 to 36 centimeters (5.9 to 14.2 inches); dark gray (10YR 4/1), very dark gray (10YR 3/1), moist; clay; moderate medium subangular blocky structure; 5.0 very fine roots throughout and 3.0 fine roots throughout; 3 percent by volume subrounded quartzite fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.8, pH meter; clear smooth boundary. Lab sample # TAMU7434; moist when described; observed in trench
    Bkssy1—36 to 71 centimeters (14.2 to 28.0 inches); dark gray (2.5Y 4/1), very dark gray (2.5Y 3/1), moist; clay; moderate coarse angular blocky structure; 4.0 very fine roots and 1.0 fine roots; 1.0 very fine pores; 25 percent prominent slickensides (pedogenic); 4 percent medium carbonate concretions and 1 percent medium carbonate nodules; 1 percent by volume subrounded quartzite fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.7, pH meter; gradual wavy boundary. Lab sample # TAMU7435; moist when described; observed in trench
    Bkssy2—71 to 112 centimeters (28.0 to 44.1 inches); dark gray (2.5Y 4/1), very dark gray (2.5Y 3/1), moist; clay; 6 percent olive brown (2.5Y 4/3) distinct mottles; moderate coarse wedge structure; 3.0 very fine roots and 0.5 fine roots; 1.0 very fine pores; 35 percent prominent slickensides (pedogenic); 2 percent medium carbonate concretions and 1 percent medium carbonate nodules; 1 percent by volume subrounded quartzite fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.7, pH meter; clear wavy boundary. Lab sample # TAMU7436; moist when described; observed in trench
    Bkssy3—112 to 136 centimeters (44.1 to 53.5 inches);, dark grayish brown (2.5Y 4/2), moist; clay; 8 percent gray (2.5Y 5/1) faint and 10 percent yellowish brown (10YR 5/6) prominent mottles; moderate medium angular blocky structure; 1.0 very fine roots and 0.5 fine roots; 0.5 very fine and 0.2 fine pores; 5 percent very dark gray (10YR 3/1), moist, organic stains and 15 percent distinct slickensides (pedogenic); 3 percent medium gypsum crystals, unspecified and 1 percent medium carbonate masses; fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.7, pH meter; clear wavy boundary. Lab sample # TAMU7437; moist when described; observed in trench
    BCkssy—136 to 172 centimeters (53.5 to 67.7 inches);, light olive brown (2.5Y 5/3), moist; clay; 8 percent gray (2.5Y 5/1) medium distinct and 15 percent yellowish brown (10YR 5/6) coarse prominent mottles; weak medium subangular blocky structure; 0.5 very fine roots and 0.2 fine roots; 0.5 very fine and 0.2 fine pores; 5 percent very dark gray (10YR 3/1), moist, organic stains and 5 percent distinct slickensides (pedogenic); 3 percent medium gypsum crystals, unspecified and 1 percent medium carbonate masses; fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.6, pH meter; clear wavy boundary. Lab sample # TAMU7438; moist when described; observed in trench
    CBy—172 to 197 centimeters (67.7 to 77.6 inches);, light olive brown (2.5Y 5/4), moist; silty clay; 10 percent gray (2.5Y 5/1) medium distinct and 20 percent yellowish brown (10YR 5/6) coarse distinct mottles; structureless massive; 0.2 very fine roots; 0.5 very fine and 0.2 fine pores; 5 percent medium gypsum crystals, unspecified; fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.5, pH meter; clear smooth boundary. Lab sample # TAMU7439; moist when described; observed in trench
    Cdy—197 to 204 centimeters (77.6 to 80.3 inches);, light olive brown (2.5Y 5/4), moist; silty clay; 5 percent gray (2.5Y 6/1) medium distinct and 8 percent yellowish brown (10YR 5/8) coarse distinct and 20 percent yellowish brown (10YR 5/6) coarse faint mottles; structureless massive; 3 percent medium gypsum crystals, unspecified; fragments; noneffervescent, by hcl, 1n; slightly alkaline, pH 7.6, pH meter. Lab sample # TAMU7440; moist when described; observed in trench