IDENTIFIERS

  • Current Taxon Name (Soil Name): Houston Black
  • OSD
  • Series Extent
  • User Site ID: S1992TX085002
  • User Pedon ID: 92TX085002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 92P0596
  • NCSS Pedon Lab Data NASIS Record ID - 64835
  • Print Date: 12/17/2024

    • 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: 32.9874992
  • Std. Longitude: -96.7644424
  • Datum: WGS84
  • Location Description: Texas A&M Univ. Agr. Res. and Ext. Center, Dallas, Texas; in the SE corner of the woodland plot which is E of the administration building.
  • State: Texas
  • County: TX085—Collin
  • MLRA: 86—Texas Blackland Prairie
  • Non-MLRA Soil Survey Area: TX085—Collin County, Texas

    • PEDON

  • Describers Name: DeWaye Williams, Larry Wilding, Gaylon Lane, Joe Nichols, Mike Wilson, John Allison.
  • Current Taxonomic Class: Fine, smectitic, thermic Udic Calciusterts
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - Houston Black
  • PSC - 25 to 100 cm.
  • Classificaton Date - 1/27/2010
  • Moisture Class - udic
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Fairlie
  • Classificaton Date - 4/9/1992
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: upland
  • Landform: marine terrace
  • Slope Shape Across: linear
  • Runoff: low
  • Drainage Class: moderately well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: with 10 to <45
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/9/1992 (actual site observation date)
  • Air Photo ID: 59
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - intermixed conifers and hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    cambic horizon

    paralithic contact

    0—150

    26—162

    175—190

    —-

    —-

    —-
    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

    —

    —

    213

    —

    891

    —

    —

    19

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 8 centimeters (0.0 to 3.1 inches); very dark gray (10YR 3/1), black (10YR 2/1), moist; silty clay; weak thin platy, and moderate very fine and fine angular blocky structure; hard, firm, moderately sticky, moderately plastic; 0.5 fine roots; fragments; clear smooth boundary. Lab sample # 92P03568
    A1—8 to 26 centimeters (3.1 to 10.2 inches); very dark gray (10YR 3/1), very dark grayish brown (10YR 3/2), moist; moderate very fine and fine angular blocky structure; hard, firm, very sticky, very plastic; 0.5 fine roots; nonintersecting slickensides; 1 percent fine spherical carbonate masses and 1 percent fine spherical carbonate nodules; fragments; gradual smooth boundary. Lab sample # 92P03569. few weak slickensides and pressure faces.
    Bss1—26 to 46 centimeters (10.2 to 18.1 inches); very dark gray (10YR 3/1), black (10YR 2/1), moist; silty clay; moderate very fine and fine angular blocky structure; very hard, firm, very sticky, very plastic; 0.5 fine and medium roots; slickensides (pedogenic); 10 percent medium and coarse spherical carbonate nodules; fragments; gradual smooth boundary. Lab sample # 92P03570. a few weak slickensides and pressure faces at 50-60 degree angle from horizontal; concretions are pitted.
    Bss2—46 to 85 centimeters (18.1 to 33.5 inches); very dark gray (10YR 3/1), black (10YR 2/1), moist; silty clay; strong very fine and fine angular blocky structure; very hard, firm, very sticky, very plastic; 0.5 fine and medium roots; slickensides (pedogenic); 10 percent fine spherical carbonate nodules; fragments; gradual smooth boundary. Lab sample # 92P03571. strong medium wedge shaped aggregates parting to the structure.
    Bkss1—85 to 100 centimeters (33.5 to 39.4 inches); dark gray (10YR 4/1), very dark gray (10YR 3/1), moist; silty clay; strong very fine and fine angular blocky structure; very hard, firm, very sticky, very plastic; 0.5 fine and medium roots; slickensides (pedogenic); 10 percent fine and medium spherical carbonate nodules; fragments; clear wavy boundary. Lab sample # 92P03572. strong medium wedge shaped aggregates parting to the structure.
    Bkss2—100 to 150 centimeters (39.4 to 59.1 inches); dark brown (10YR 3/3), very dark grayish brown (10YR 3/2), moist; silty clay; 10 percent dark grayish brown (10YR 4/2) coarse faint mottles; strong fine and medium angular blocky structure; very hard, firm, very sticky, very plastic; 0.5 fine and medium roots; slickensides (pedogenic); 10 percent fine and medium spherical carbonate masses and 10 percent fine and medium spherical carbonate nodules; fragments; clear irregular boundary. Lab sample # 92P03573. many very strongly expressed large slickensides parting to structure.
    BCkss—150 to 162 centimeters (59.1 to 63.8 inches); light gray (10YR 7/2), light brownish gray (10YR 6/2), moist; silty clay; 10 percent yellowish brown (10YR 5/6) fine and medium distinct and 25 percent dark grayish brown (10YR 4/2) coarse distinct mottles; strong fine and medium angular blocky structure; very hard, firm, very sticky, very plastic; slickensides (pedogenic); 10 percent fine and medium spherical carbonate nodules; fragments. Lab sample # 92P03574. strong coarse wedge shaped aggregates parting to structure; concretions are pitted.
    CBk—162 to 175 centimeters (63.8 to 68.9 inches); very pale brown (10YR 8/3), very pale brown (10YR 7/3), moist; 10 percent yellowish brown (10YR 5/6) fine and medium distinct and 10 percent yellowish red (5YR 4/6) fine and medium distinct mottles; moderately sticky, moderately plastic; fragments. Lab sample # 92P03575. texture - material is chalk; fracture planes in the rock have common medium and coarse 10YR 4/2 moist coatings; more than 50% rock structure; digs fairly easily; a few fine roots along the fracture planes; at the top of the material is a thin discontinuous layer of white limy material.
    Cr—175 to 190 centimeters (68.9 to 74.8 inches); very pale brown (10YR 8/4), very pale brown (10YR 7/3), moist; 10 percent yellowish brown (10YR 5/6) fine and medium distinct mottles; fragments. Lab sample # 92P03576. texture - material is chalk; a few coatings of brownish yellow clay along fracture planes.