IDENTIFIERS

  • Current Taxon Name (Soil Name): Robco
  • OSD
  • Series Extent
  • User Site ID: S2010TX055008
  • User Pedon ID: S2010TX055008
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 10N0996
  • NCSS Pedon Lab Data NASIS Record ID - 37515
  • Print Date: 4/14/2025

    • 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: 29.7700000
  • Std. Longitude: -97.5215778
  • Datum: WGS84
  • State: Texas
  • County: TX055—Caldwell
  • MLRA: 87A—Texas Claypan Area, Southern Part
  • Non-MLRA Soil Survey Area: TX055—Caldwell County, Texas
  • 7.5 Minute USGS Quad: 29097-G5—McMahan, Texas

    • PEDON

  • Describers Name: R. Reid, J. McCormick, J. Bushong, T. Waiser
  • Current Taxonomic Class: Loamy, siliceous, active, thermic Aquic Arenic Paleustalfs
  • Current Taxon Kind: series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Correlated Information:
  • Soil Name - Robco
  • PSC - 78 to 128 cm.
  • Classificaton Date - 7/5/2011
  • Moisture Class - ustic
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Demona
  • Classificaton Date - 4/13/2010
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: loamy alluvium
  • Landscape: inland dissected coastal plain
  • Landform: broad ridge
  • Geomorphic Component Hills: base slope
  • Hill Slope Profile: footslope
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Ewi formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/13/2010 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - pastureland, tame
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - sunny
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    redox concentrations

    abrupt textural change

    argillic horizon

    reduced matrix

    0—78

    47—215

    78—

    78—215

    78—215

    —78—

    —168—

    —-

    —137—

    —137—
    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

    3

    —

    —

    142

    —

    196

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 17 centimeters (0.0 to 6.7 inches); brown (10YR 5/3), brown (10YR 4/3), moist; loamy fine sand; weak medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; 4.0 very fine roots throughout and 2.0 fine roots throughout; fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 10N04762; moist when described; observed in trench
    E1—17 to 47 centimeters (6.7 to 18.5 inches); yellowish brown (10YR 5/4), dark yellowish brown (10YR 4/4), moist; loamy fine sand; weak medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; 3.0 very fine roots throughout and 1.0 fine roots throughout; fragments; noneffervescent, by hcl, 1n; gradual smooth boundary. Lab sample # 10N04763; moist when described; observed in trench
    E2—47 to 78 centimeters (18.5 to 30.7 inches); 55 percent pale brown (10YR 6/3) and 45 percent yellowish brown (10YR 5/4), 55 percent yellowish brown (10YR 5/4) and 45 percent dark yellowish brown (10YR 4/4), moist; loamy fine sand; weak medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; 1.0 very fine roots throughout and 0.5 fine roots throughout; 10 percent yellowish red (5YR 5/8), dry, and yellowish red (5YR 4/6), moist, masses of oxidized iron and 15 percent strong brown (7.5YR 4/6), dry, and brown (7.5YR 4/4), moist, masses of oxidized iron; 1 percent by volume subrounded moderately coherent cemented 2-?-20 millimeter ironstone nodules fragments; noneffervescent, by hcl, 1n; gradual wavy boundary. Lab sample # 10N04764; wet when described; observed in trench
    Btg1—78 to 94 centimeters (30.7 to 37.0 inches); light brownish gray (10YR 6/2), grayish brown (10YR 5/2), moist; fine sandy loam; moderate medium subangular blocky structure; moderately hard, firm, slightly sticky, slightly plastic; 0.5 very fine roots throughout; 0.1 very fine tubular pores; 5 percent strong brown (7.5YR 5/8), dry, and strong brown (7.5YR 4/6), moist, masses of oxidized iron and 20 percent strong brown (7.5YR 4/6), dry, and brown (7.5YR 4/4), moist, masses of oxidized iron; 1 percent by volume subrounded moderately coherent cemented 2-?-20 millimeter ironstone nodules fragments; noneffervescent, by hcl, 1n; gradual smooth boundary. Lab sample # 10N04765; moist when described; observed in trench
    Btg2—94 to 129 centimeters (37.0 to 50.8 inches); gray (10YR 5/1), dark gray (10YR 4/1), moist; sandy clay loam; moderate medium subangular blocky structure; hard, very firm, moderately sticky, moderately plastic; 0.1 very fine tubular pores; 5 percent strong brown (7.5YR 5/8), dry, and strong brown (7.5YR 4/6), moist, masses of oxidized iron and 10 percent yellowish red (5YR 4/6), dry, and yellowish red (5YR 4/6), moist, masses of oxidized iron and 15 percent dark red (2.5YR 3/6), moist, and dark red (2.5YR 3/6), dry, masses of oxidized iron and 15 percent grayish brown (10YR 5/2), moist, and gray (10YR 6/1), dry, masses of reduced iron; 1 percent by volume subrounded moderately coherent cemented 2-?-20 millimeter ironstone nodules fragments; noneffervescent, by hcl, 1n; gradual smooth boundary. Lab sample # 10N04766; moist when described; observed in trench
    Btg3—129 to 181 centimeters (50.8 to 71.3 inches); gray (10YR 5/1), dark gray (10YR 4/1), moist; sandy clay loam; moderate medium subangular blocky structure; hard, very firm, moderately sticky, moderately plastic; 0.1 very fine tubular pores; 1 percent fine iron-manganese concretions and 5 percent dark red (2.5YR 3/6), dry, and dark red (2.5YR 3/6), moist, masses of oxidized iron and 10 percent strong brown (7.5YR 5/8), dry, and strong brown (7.5YR 4/6), moist, masses of oxidized iron and 10 percent grayish brown (10YR 5/2), moist, and gray (10YR 6/1), dry, masses of reduced iron and 30 percent yellowish red (5YR 4/6), moist, and yellowish red (5YR 4/6), dry, masses of oxidized iron; 1 percent by volume subrounded moderately coherent cemented 2-?-20 millimeter ironstone nodules fragments; noneffervescent, by hcl, 1n; gradual smooth boundary. Lab sample # 10N04767; moist when described; observed in trench
    Btg4—181 to 215 centimeters (71.3 to 84.6 inches); gray (10YR 6/1), gray (10YR 5/1), moist; fine sandy loam; moderate medium subangular blocky structure; hard, very firm, moderately sticky, moderately plastic; 0.1 very fine tubular pores; 5 percent brown (7.5YR 4/3), dry, and brown (7.5YR 4/2), moist, masses of reduced iron and 20 percent red (2.5YR 4/6), moist, and yellowish red (5YR 4/6), dry, masses of oxidized iron and 30 percent strong brown (7.5YR 5/8), dry, and strong brown (7.5YR 5/6), moist, masses of oxidized iron; 5 percent by volume subrounded moderately coherent cemented 2-?-76 millimeter ironstone nodules fragments; noneffervescent, by hcl, 1n. Lab sample # 10N04768; moist when described; observed in trench