IDENTIFIERS

  • Current Taxon Name (Soil Name): Pontotoc
  • OSD
  • Series Extent
  • User Site ID: S1982TX299005
  • User Pedon ID: 82TX299005
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 82P0854
  • NCSS Pedon Lab Data NASIS Record ID - 51640
  • Print Date: 12/4/2024

    • 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: 30.8533056
  • Std. Longitude: -98.5550833
  • Datum: WGS84
  • Location Description: Llano County, TX; Tom Allen Ranch; from the intersection of Texas Highway 16 and Texas Highway 29 in Llano, TX, about 2.2 miles east on Texas Highway 29, 6 miles northeast on Farm Market Road 2241 to Lone Grove, 1.9 miles north on County Road 216, 1.8 miles northeast on County Road 216A, 300 feet south on footslope below sandstone hill. (about 4.5 km NNE of Loe Grove, 60 meters W and 45 meters S of E to N bend in road, 300 meters W of point peak)
  • State: Texas
  • County: TX299—Llano
  • MLRA: 82A—Texas Central Basin
  • Non-MLRA Soil Survey Area: TX299—Llano County, Texas
  • 7.5 Minute USGS Quad: 30098-G5—Lone Grove, Texas

    • PEDON

  • Describers Name: A. J. Turner, C. L. Girdner, W. C. Coburn
  • Current Taxonomic Class: Coarse-loamy, mixed, active, thermic Rhodic Paleustalfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 5
  • Correlated Information:
  • Soil Name - Pontotoc
  • PSC - 48 to 98 cm.
  • Classificaton Date - 11/11/2015
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Pontotoc
  • Taxonomic Class - Coarse-loamy, mixed, thermic Rhodic Paleustalf
  • Taxon Kind - series
  • Classificaton Date - 9/16/1982
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 1


    • SITE

  • Parent Material: residuum and/or slope alluvium derived from sandstone
  • Landscape: dissected plateau
  • Landform: ridge
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: footslope
  • Slope Position: middle third
  • Slope Shape Down: linear
  • Drainage Class: well
  • Geology: Hickory Formation formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/16/1982 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, grassland
  • 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

    ochric epipedon

    argillic horizon

    0—48

    48—226

    —-

    —-
    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

    —

    —

    360

    —

    270

    107

    —

    —

    19

    28

    9

    —

    —

    —

    —

    —

    —

    —

    —
    A1—0 to 10 centimeters (0.0 to 3.9 inches); reddish brown (5YR 4/4) interior, dark reddish brown (5YR 3/4) interior, moist; loamy sand; weak very fine subangular blocky, and weak very fine granular structure; slightly hard, very friable; 2.5 fine roots; 2.5 fine tubular pores; fragments; slightly acid, pH 6.3, hellige-truog; abrupt smooth boundary. Lab sample # 82P04377
    A2—10 to 48 centimeters (3.9 to 18.9 inches); reddish brown (5YR 4/4) interior, dark reddish brown (5YR 3/4) interior, moist; loamy sand; weak medium subangular blocky structure; slightly hard, friable; 2.5 fine roots; 2.5 fine tubular pores; fragments; slightly acid, pH 6.3, hellige-truog; gradual smooth boundary. Lab sample # 82P04378
    Bt1—48 to 82 centimeters (18.9 to 32.3 inches); dark reddish brown (2.5YR 3/4) interior, dark reddish brown (2.5YR 3/4) interior, moist; fine sandy loam; moderate medium subangular blocky structure; hard, friable; 0.5 fine roots; 2.5 fine tubular pores; clay films in root channels and/or pores; fragments; slightly acid, pH 6.3, hellige-truog; gradual smooth boundary. Lab sample # 82P04379
    Bt2—82 to 109 centimeters (32.3 to 42.9 inches); dark red (2.5YR 3/6) interior, dark red (2.5YR 3/6) interior, moist; fine sandy loam; weak medium subangular blocky structure; hard, friable; 0.5 fine roots; 2.5 fine tubular pores; clay films in root channels and/or pores and clay bridges between sand grains; fragments; slightly acid, pH 6.3, hellige-truog; clear smooth boundary. Lab sample # 82P04380
    Bt3—109 to 155 centimeters (42.9 to 61.0 inches); red (2.5YR 4/8) interior, 2.5YR 3/8 (2.5YR 3/8) interior, moist; fine sandy loam; weak medium subangular blocky structure; hard, friable; 0.5 fine roots; 2.5 fine tubular pores; clay films in root channels and/or pores and clay bridges between sand grains; fragments; slightly acid, pH 6.3, hellige-truog; clear smooth boundary. Lab sample # 82P04381
    Bt4—155 to 183 centimeters (61.0 to 72.0 inches); dark yellowish brown (10YR 4/4) interior, dark yellowish brown (10YR 4/4) interior, moist; sandy clay loam; moderate medium subangular blocky structure; very hard, firm; 0.5 fine tubular pores; clay films; fragments; slightly acid, pH 6.3, hellige-truog; clear smooth boundary. Lab sample # 82P04382. patchy - phpvsfiid 1168592; patchy - phpvsfiid 1168592
    2Btc1—183 to 195 centimeters (72.0 to 76.8 inches); olive brown (2.5Y 4/4) interior, olive brown (2.5Y 4/4) interior, moist; sandy clay loam; moderate coarse prismatic, and moderate medium subangular blocky structure; extremely hard, very firm; clay films; fragments; neutral, pH 7.0, hellige-truog; gradual smooth boundary. Lab sample # 82P04383. patchy - phpvsfiid 1168593; patchy - phpvsfiid 1168593
    2Btc2—195 to 226 centimeters (76.8 to 89.0 inches); olive brown (2.5Y 4/4) interior, olive brown (2.5Y 4/4) interior, moist; sandy clay loam; moderate coarse prismatic, and moderate medium subangular blocky structure; extremely hard, firm; clay films; fragments; neutral, pH 7.0, hellige-truog; gradual smooth boundary. Lab sample # 82P04384. Separated for sampling.; patchy - phpvsfiid 1168594; patchy - phpvsfiid 1168594
    2Bt—226 to 243 centimeters (89.0 to 95.7 inches); olive brown (2.5Y 4/4) interior, olive brown (2.5Y 4/4) interior, moist; sandy clay loam; weak medium subangular blocky structure; extremely hard, very firm; fragments. Lab sample # 82P04385. Few films and threads of calcium carbonate.