IDENTIFIERS

  • Current Taxon Name (Soil Name): Webb
  • OSD
  • Series Extent
  • User Site ID: S82TX163001
  • User Pedon ID: S82TX163001
  • Vegetation Plot ID: S82TX-163-001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - TAMU
  • Lab Pedon # - S82TX163001
  • NCSS Pedon Lab Data NASIS Record ID - 82630
  • Print Date: 5/19/2024

    • 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: 28.8974724
  • Std. Longitude: -98.8710632
  • Datum: WGS84
  • Location Description: From intersection of U.S. 81 and FR 140 in Pearsall, 22.8 km east on FR 140, 0.56 km south on FR 472, 69 west of fence in rangeland.
  • State: Texas
  • County: TX163—Frio
  • MLRA: 83A—Northern Rio Grande Plain
  • Non-MLRA Soil Survey Area: TX163—Frio County, Texas
  • 7.5 Minute USGS Quad: 28098-H7—Schattel, Texas

    • PEDON

  • Describers Name: Brubaker, Gabriel, Girdner, Groves, Hallmark, Stevens
  • Current Taxonomic Class: Fine, smectitic, hyperthermic Aridic Paleustalfs
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Webb (flagged as OSD)
  • PSC - 25 to 75 cm.
  • Classificaton Date - 6/19/2015
  • Classifier - James B. Akin
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Webb (flagged as OSD)
  • Taxonomic Class - Fine, montmorillonitic, hyperthermic Aridic Paleustalfs
  • Taxon Kind - series
  • Classificaton Date - 7/1/1982
  • Moisture Class - ustic
  • Moisture SUBClass - aridic (torric)
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 1


    • SITE

  • Parent Material: sandstone
  • Landscape: upland
  • Drainage Class: well
  • Geology: Queen City formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/2/1982 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, shrubby
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    ACACI

    ALGR2

    AMBRO

    ARIST

    CHCU2

    JADI

    OPUNT

    PRGLG

    Acacia

    Aloysia gratissima

    Ambrosia

    Aristida

    Chloris cucullata

    Jatropha dioica

    Opuntia

    Prosopis glandulosa var. glandulosa

    acacia

    whitebrush

    ragweed

    threeawn

    hooded windmill grass

    leatherstem

    pricklypear

    honey mesquite

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, densic

    weakly coherent

    183 - 203

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

    ochric epipedon

    argillic horizon

    secondary carbonates

    gypsum accumulations

    salt accumulations

    0—25

    25—183

    66—127

    127—165

    127—206

    —25—

    —158—

    —61—

    —38—

    —76—
    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

    2.5

    —

    —

    168

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 25 centimeters (0.0 to 9.8 inches); brown (7.5YR 4/4), dark brown (7.5YR 3/4), moist; very fine sandy loam; weak fine and medium subangular blocky structure; slightly hard, very friable; common (3.0) fine roots; few (0.5) fine tubular pores; fragments; noneffervescent; slightly acid, pH 6.3; abrupt smooth boundary. Lab sample # TAMU1326
    Bt1—25 to 47 centimeters (9.8 to 18.5 inches); reddish brown (5YR 4/4), dark reddish brown (5YR 3/4), moist; sandy clay; moderate medium prismatic parts to strong medium angular blocky structure; very hard, firm; common (3.0) fine roots between peds and many (6.0) fine roots top of horizon; few (0.5) fine tubular pores; 70 percent distinct dark reddish brown (5YR 3/3) clay films on all faces of peds; 1 percent by volume 2-12-20 millimeter ironstone nodules fragments; noneffervescent; slightly acid, pH 6.3; gradual smooth boundary. Lab sample # TAMU1327
    Bt2—47 to 66 centimeters (18.5 to 26.0 inches); reddish brown (5YR 4/4), dark reddish brown (5YR 3/4), moist; sandy clay loam; moderate prismatic parts to strong medium angular blocky structure; very hard, firm; common (3.0) fine roots between peds; few (0.5) fine pores; 70 percent distinct dark reddish brown (5YR 3/3) clay films on all faces of peds; 1 percent fine carbonate concretions; 1 percent by volume noncoherent cemented 2-4-5 millimeter sandstone, unspecified fragments; noneffervescent; neutral, pH 7.0; clear wavy boundary. Lab sample # TAMU1328
    Btk1—66 to 96 centimeters (26.0 to 37.8 inches); yellowish red (5YR 5/6), yellowish red (5YR 4/6), moist; sandy clay loam; weak coarse prismatic parts to moderate medium subangular blocky structure; hard, friable; few (0.5) fine roots; few (0.5) fine pores; 5 percent distinct carbonate coats on all faces of peds and 30 percent faint red (2.5YR 4/6) clay films on horizontal faces of peds and 50 percent clay bridges between sand grains and 60 percent distinct red (2.5YR 4/6) clay films on vertical faces of peds; 1 percent fine and medium distinct spherical weakly coherent cemented carbonate nodules; 1 percent by volume noncoherent cemented 2-4-5 millimeter sandstone, unspecified fragments; slight effervescence; moderately alkaline, pH 8.2; gradual wavy boundary. Lab sample # TAMU1329
    Btk2—96 to 127 centimeters (37.8 to 50.0 inches); yellowish red (5YR 5/6), yellowish red (5YR 4/6), moist; sandy clay loam; weak coarse prismatic parts to moderate medium subangular blocky structure; hard, friable; few (0.5) fine roots; few (0.5) fine tubular pores; 20 percent faint yellowish red (5YR 4/6) clay films on horizontal faces of peds and 35 percent clay bridges between sand grains and 40 percent faint yellowish red (5YR 4/6) clay films on vertical faces of peds; 1 percent fine spherical weakly coherent cemented carbonate nodules; 1 percent by volume noncoherent cemented 2-4-5 millimeter sandstone, unspecified fragments; noneffervescent; slightly alkaline, pH 7.6; gradual wavy boundary. Lab sample # TAMU1330
    Btyz1—127 to 165 centimeters (50.0 to 65.0 inches); yellowish red (5YR 5/6), yellowish red (5YR 4/6), moist; sandy clay loam; 11 percent brownish yellow (10YR 6/6) medium distinct mottles; weak coarse prismatic parts to weak medium subangular blocky structure; hard, friable; few (0.5) fine roots; few (0.5) fine and medium tubular pores; 2 percent distinct black (10YR 2/1) manganese or iron-manganese stains on vertical faces of peds and 2 percent gypsum coats on faces of peds and 15 percent faint clay films on horizontal faces of peds and 30 percent clay bridges between sand grains and 35 percent faint clay films on vertical faces of peds; 2 percent gypsum crystal clusters on faces of peds and 1 percent salt crystals on faces of peds and 1 percent threadlike gypsum masses on faces of peds; 1 percent by volume noncoherent cemented 2-4-5 millimeter sandstone, unspecified fragments; noneffervescent; slightly alkaline, pH 7.6; gradual wavy boundary. Lab sample # TAMU1331
    Btyz2—165 to 183 centimeters (65.0 to 72.0 inches); strong brown (7.5YR 5/6), strong brown (7.5YR 4/6), moist; sandy clay loam; 11 percent brownish yellow (10YR 6/6) medium distinct mottles; weak coarse prismatic parts to weak fine subangular blocky structure; hard, friable; few (0.5) fine roots between peds; few (0.5) very fine tubular pores; 2 percent gypsum coats on faces of peds and 10 percent faint clay films on horizontal faces of peds and 30 percent faint clay films on vertical faces of peds and 30 percent clay bridges between sand grains; 1 percent gypsum crystal clusters on faces of peds and 1 percent salt crystals on faces of peds and 1 percent threadlike gypsum masses on faces of peds; 5 percent by volume noncoherent cemented 2-4-5 millimeter sandstone, unspecified fragments; noneffervescent; neutral, pH 7.0; clear irregular boundary. Lab sample # TAMU1332
    Cdz—183 to 206 centimeters (72.0 to 81.1 inches); pinkish white (5YR 8/2), pinkish gray (5YR 7/2), moist; sandy clay loam; massive; hard, friable, weakly coherent; few (0.5) fine roots top of horizon; fragments; noneffervescent; neutral, pH 7.0. Lab sample # TAMU1333