IDENTIFIERS

  • Current Taxon Name (Soil Name): Kirvin
  • OSD
  • Series Extent
  • User Site ID: S80TX405001
  • User Pedon ID: S80TX405001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - TAMU
  • Lab Pedon # - S80TX405001
  • NCSS Pedon Lab Data NASIS Record ID - 45665
  • Print Date: 5/30/2024

    • 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: 31.3616085
  • Std. Longitude: -94.2235336
  • Datum: WGS84
  • Location Description: From the intersection of Texas State Highway 103 and Texas State Highway 147, 2.3 miles southwest on Texas State Highway 147 to Forest Service road, 0.35 mile southeast on forest road, and 75 feet east into forest.
  • Map Unit: KhB—Kirvin fine sandy loam, 1 to 5 percent slopes
  • Country: US—United States
  • State: Texas
  • County: TX405—San Augustine
  • MLRA: 133B—Western Coastal Plain
  • Non-MLRA Soil Survey Area: TX619—San Augustine and Sabine Counties, Texas
  • 7.5 Minute USGS Quad: 31094-C2—Harvey Creek, Texas

    • PEDON

  • Describers Name: Wilding,Hallmark,West,Brockmann,Fuchs,Holt,Peters
  • Current Taxonomic Class: Clayey, mixed, superactive, thermic Typic Hapludults
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Correlated Information:
  • Soil Name - Kirvin
  • PSC - 26 to 76 cm.
  • Classificaton Date - 5/21/2012
  • Soil Taxonomic Edition - eleventh edition
  • Sampled As Information:
  • Soil Name - Kirvin
  • Classificaton Date - 8/11/1980
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: clayey fluviomarine deposits
  • Landscape: coastal plain
  • Landform: interfluve
  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Position: middle third
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: medium
  • Drainage Class: well
  • Bedrock: sandstone and shale at 147cm
  • Geology: Yegua formation of the Yegua group.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/11/1980 (actual site observation date)
  • Air Photo ID:
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - conifers
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Yield Study ID -
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    densic material

    moderately coherent

    147 - 165

    —
    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    densic materials

    0—7

    26—147

    147—165

    —-

    —-

    —-
    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

    —

    —

    107.2

    —

    1207

    —

    —

    18

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 7 centimeters (0.0 to 2.8 inches); dark grayish brown (10YR 4/2) fine sandy loam; weak fine subangular blocky structure; soft, very friable; 8.0 fine roots; fragments; moderately acid, pH 5.8; clear wavy boundary. Lab sample # TAMU877
    E1—7 to 17 centimeters (2.8 to 6.7 inches); brown (10YR 5/3) fine sandy loam; weak fine subangular blocky structure; slightly hard, very friable; 3.0 fine roots; fragments; very strongly acid, pH 4.8; clear smooth boundary. Lab sample # TAMU878
    E2—17 to 26 centimeters (6.7 to 10.2 inches); pale brown (10YR 6/3) fine sandy loam; weak fine subangular blocky structure; slightly hard, very friable; 3.0 fine roots; fragments; strongly acid, pH 5.3; abrupt smooth boundary. Lab sample # TAMU879
    Bt1—26 to 44 centimeters (10.2 to 17.3 inches); red (2.5YR 4/6) clay; weak fine prismatic parts to strong medium subangular blocky structure; hard, firm; 3.0 fine roots; 3.0 fine pores; 20 percent distinct clay films on all faces of peds; fragments; extremely acid, pH 4.0; clear smooth boundary. Lab sample # TAMU880. continuous - phpvsfiid 332504; continuous - phpvsfiid 332504
    Bt2—44 to 68 centimeters (17.3 to 26.8 inches); red (2.5YR 4/8) clay; weak fine prismatic parts to moderate medium subangular blocky structure; hard, firm; 3.0 fine roots; 3.0 fine pores; 20 percent distinct clay films on all faces of peds; 1 percent fine distinct yellowish red (5YR 4/6), moist, masses of oxidized iron; fragments; extremely acid, pH 4.0; clear smooth boundary. Lab sample # TAMU881. continuous - phpvsfiid 332505; continuous - phpvsfiid 332505
    Bt3—68 to 86 centimeters (26.8 to 33.9 inches); red (2.5YR 4/6) clay; weak medium subangular blocky structure; hard, firm; 0.9 fine roots; 0.9 fine pores; 20 percent distinct clay films on all faces of peds; 1 percent medium distinct brownish yellow (10YR 6/8), moist, masses of oxidized iron; fragments; extremely acid, pH 4.0; clear smooth boundary. Lab sample # TAMU882. continuous - phpvsfiid 332506; continuous - phpvsfiid 332506
    Bt4—86 to 104 centimeters (33.9 to 40.9 inches); 2.5Y 4/6 (2.5Y 4/6) clay; weak medium subangular blocky structure; hard, firm; 0.9 fine roots; 0.9 fine pores; 20 percent distinct clay films on all faces of peds; 10 percent medium prominent light yellowish brown (10YR 6/4), moist, masses of oxidized iron and 10 percent medium prominent brownish yellow (10YR 6/6), moist, masses of oxidized iron; fragments; extremely acid, pH 4.0; gradual wavy boundary. Lab sample # TAMU883. continuous - phpvsfiid 332507; continuous - phpvsfiid 332507
    BCt1—104 to 127 centimeters (40.9 to 50.0 inches); light brownish gray (10YR 6/2) sandy clay loam; weak coarse subangular blocky structure; hard, firm; 15 percent distinct clay films on vertical faces of peds; 10 percent medium prominent brownish yellow (10YR 6/8), moist, masses of oxidized iron and 12 percent medium faint pale brown (10YR 6/3), moist, masses of oxidized iron; fragments; extremely acid, pH 4.0; gradual wavy boundary. Lab sample # TAMU884. continuous - phpvsfiid 332508; continuous - phpvsfiid 332508
    BCt2—127 to 147 centimeters (50.0 to 57.9 inches); light brownish gray (10YR 6/2) sandy clay loam; weak coarse subangular blocky structure; hard, firm; 0.9 fine roots in cracks; 15 percent distinct clay films on vertical faces of peds; 1 percent coarse prominent brownish yellow (10YR 6/8), moist, masses of oxidized iron and 10 percent medium faint pale brown (10YR 6/3), moist, masses of oxidized iron; fragments; extremely acid, pH 4.0; gradual wavy boundary. Lab sample # TAMU885. discontinuous - phpvsfiid 332509; discontinuous - phpvsfiid 332509
    Cd—147 to 165 centimeters (57.9 to 65.0 inches); stratified stratified material; massive; very hard, very firm; 0.9 roots in cracks; 1 percent faint clay films on vertical faces of peds; fragments; extremely acid, pH 4.0. Lab sample # TAMU886. discontinuous - phpvsfiid 332510; discontinuous - phpvsfiid 332510