IDENTIFIERS

  • Current Taxon Name (Soil Name): Houston Black
  • OSD
  • Series Extent
  • User Site ID: S1992TX085001
  • User Pedon ID: 92TX085001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 92P0595
  • NCSS Pedon Lab Data NASIS Record ID - 64834
  • Print Date: 1/28/2025

    • 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: 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, and 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 #: 1
  • 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—60

    39—155

    170—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

    —

    —

    214

    —

    891

    —

    —

    19

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 6 centimeters (0.0 to 2.4 inches); very dark gray (10YR 3/1), black (10YR 2/1), moist; silty clay; weak thin platy, and strong fine and medium subangular blocky, and strong very fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 0.5 very fine and fine roots; 15 percent fine spherical carbonate nodules; fragments; violent effervescence, by hcl, unspecified; clear smooth boundary. Lab sample # 92P03560
    Ak—6 to 39 centimeters (2.4 to 15.4 inches); very dark grayish brown (10YR 3/2), very dark brown (10YR 2/2), moist; silty clay; moderate very fine and fine subangular blocky structure; hard, firm, very sticky, very plastic; 0.5 fine roots; 10 percent fine spherical carbonate nodules and 25 percent medium spherical carbonate masses; fragments; violent effervescence, by hcl, unspecified; gradual smooth boundary. Lab sample # 92P03561. common 1-2 cm crack in filings of 10YR 2/1 moist SIC; the carbonate nodules are in the centers of the soft masses of carbonate.
    Bkss—39 to 60 centimeters (15.4 to 23.6 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay; moderate medium and coarse angular blocky structure; very hard, firm, very sticky, very plastic; 0.5 fine roots; slickensides (pedogenic); 15 percent medium spherical carbonate masses and 15 percent medium cylindrical worm casts; fragments; violent effervescence, by hcl, unspecified; clear wavy boundary. Lab sample # 92P03562. few 1 cm wide black in filings tapering to 0.5 cm; the macro structure is large wedge shaped parallelepipeds parting to the structure.
    BCkss1—60 to 105 centimeters (23.6 to 41.3 inches); light brownish gray (10YR 6/2), grayish brown (10YR 5/2), moist; silty clay; strong medium angular blocky structure; very hard, firm, very sticky, very plastic; 0.5 fine roots; slickensides (pedogenic); 10 percent fine and medium spherical carbonate nodules and 10 percent fine and medium spherical carbonate masses; fragments; violent effervescence, by hcl, unspecified; abrupt irregular boundary. Lab sample # 92P03563. common coarse vertically oriented masses of 10YR 3/1 SIC; the macro structure is large wedge shaped parallelepipeds parting to the structure; the carbonate nodules are pitted.
    BCkss2—105 to 155 centimeters (41.3 to 61.0 inches); light brownish gray (10YR 6/2), grayish brown (10YR 5/2), moist; silty clay; strong medium and coarse angular blocky structure; very hard, firm, very sticky, very plastic; 0.5 fine roots; slickensides (pedogenic); 10 percent medium and coarse spherical carbonate masses; fragments; violent effervescence, by hcl, unspecified; abrupt irregular boundary. Lab sample # 92P03564. the macro structure is large wedge shaped parallelepipeds parting to the structure.
    CBk—155 to 170 centimeters (61.0 to 66.9 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; 0.5 fine and medium roots; 10 percent medium and coarse spherical carbonate nodules; fragments; violent effervescence, by hcl, unspecified; clear irregular boundary. Lab sample # 92P03565. 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 finer roots along fracture planes; a few krotovinas in filled with material from the horizon above; at the top of the horizon is a thin discontinuous layer of white limy material; Subsample CARBO, depth 155-170, sample number 92P3567.
    Cr—170 to 190 centimeters (66.9 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; violent effervescence, by hcl, unspecified. Lab sample # 92P03566. texture material is chalk; few coatings of brownish yellow clay along fracture planes.