IDENTIFIERS

  • Current Taxon Name (Soil Name): Knippa
  • OSD
  • Series Extent
  • User Site ID: S1963TX463001
  • User Pedon ID: S1963TX463001
  • Vegetation Plot ID: S1963TX463001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 40A4531
  • NCSS Pedon Lab Data NASIS Record ID - 40683
  • Print Date: 11/23/2024

    • 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: 29.3347222
  • Std. Longitude: -99.6155556
  • Datum: WGS84
  • Location Description: Three miles N-NE of Knippa, TX; about 1.1 miles E of Knippa, N 2.7 miles, 90 yards E in crop field.
  • State: Texas
  • County: TX463—Uvalde
  • MLRA: 83A—Northern Rio Grande Plain
  • Non-MLRA Soil Survey Area: TX463—Uvalde County, Texas
  • 7.5 Minute USGS Quad: 29099-C5—Blanco Lake, Texas

    • PEDON

  • Describers Name: M. Stout
  • Current Taxonomic Class: Fine, mixed, superactive, thermic Vertic Calciustolls
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Knippa
  • PSC - 25 to 100 cm.
  • Classificaton Date - 12/4/2015
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Knippa
  • Classificaton Date - 4/23/1963
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 1


    • SITE

  • Parent Material: alluvium derived from limestone
  • Landscape: inland dissected coastal plain
  • Landform: terrace
  • Anthropogenic Feature: leveled land
  • Geomorphic Component Terraces: tread
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/23/1963 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • 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

    SOBIB

    SOBIB

    Sorghum bicolor ssp. bicolor

    Sorghum bicolor ssp. bicolor

    grain sorghum

    grain sorghum

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    —

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

    mollic epipedon

    cambic horizon

    calcic horizon

    0—56

    56—89

    89—193

    —56—

    —33—

    —104—
    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

    0.5

    —

    —

    306.1

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    —

    —

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    Ap—0 to 13 centimeters (0.0 to 5.1 inches); brown (7.5YR 4/2), dark brown (7.5YR 3/2), moist; silty clay; weak subangular blocky structure; hard, very firm; 21 percent worm casts and 1 percent fine carbonate concretions throughout; fragments; moderately alkaline, pH 8.2, hellige-truog; abrupt smooth boundary. Lab sample # 40A34606; observed in pit, small. Contains a thin 5 cm (2 in) mulch on the surface
    A1—13 to 30 centimeters (5.1 to 11.8 inches); brown (7.5YR 4/2), dark brown (7.5YR 3/2), moist; clay; moderate and strong subangular blocky, and moderate and strong angular blocky structure; extremely hard, very firm; 21 percent worm casts and 2 percent carbonate concretions; 1 percent by volume shell fragments fragments; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 40A34607; observed in pit, small
    Bw1—30 to 56 centimeters (11.8 to 22.0 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; clay; weak prismatic parts to strong fine and medium angular blocky structure; extremely hard, very firm; 5 percent carbonate concretions and 3 percent worm casts; 1 percent by volume shell fragments fragments; moderately alkaline, pH 8.2, hellige-truog; gradual wavy boundary. Lab sample # 40A34608; observed in pit, small
    Bw2—56 to 89 centimeters (22.0 to 35.0 inches); dark yellowish brown (10YR 4/4), dark yellowish brown (10YR 3/4), moist; clay; prismatic parts to strong fine and medium angular blocky structure; extremely hard, very firm; 5 percent carbonate concretions and 3 percent worm casts; fragments; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 40A34609; observed in pit, small. Prisms apparent upon drying during sampling.
    Bk1—89 to 99 centimeters (35.0 to 39.0 inches); yellowish brown (10YR 5/4), dark yellowish brown (10YR 4/4), moist; silty clay; weak prismatic parts to moderate medium angular blocky structure; extremely hard, very firm; 9 percent carbonate concretions and 1 percent worm casts; fragments; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 40A34610; observed in pit, small
    Bk2—99 to 132 centimeters (39.0 to 52.0 inches); reddish brown (5YR 5/4), yellowish red (5YR 5/6), moist; silty clay loam; moderate medium angular blocky, and moderate medium subangular blocky structure; very hard, very firm; 15 percent carbonate concretions and 10 percent carbonate masses and 1 percent worm casts; fragments; moderately alkaline, pH 8.2, hellige-truog; gradual wavy boundary. Lab sample # 40A34611; observed in pit, small
    Bk3—132 to 168 centimeters (52.0 to 66.1 inches); reddish yellow (5YR 6/6), yellowish red (5YR 5/6), moist; silty clay loam; moderate medium angular blocky, and moderate medium subangular blocky structure; 10 percent carbonate concretions and 5 percent carbonate masses and 1 percent worm casts; fragments; clear wavy boundary. Lab sample # 40A34612; observed in pit, small
    Bk4—168 to 193 centimeters (66.1 to 76.0 inches); pink (7.5YR 7/4), reddish yellow (7.5YR 6/6), moist; silty clay loam; weak prismatic parts to weak and moderate angular blocky structure; very hard, very firm; 7 percent carbonate concretions and 3 percent carbonate masses and 1 percent worm casts; fragments; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 40A34613; observed in pit, small
    C1—193 to 226 centimeters (76.0 to 89.0 inches); yellowish red (5YR 5/6), yellowish red (5YR 5/6), moist; silty clay; fragments. Lab sample # 40A34614; observed in auger, bucket
    C2—226 to 315 centimeters (89.0 to 124.0 inches); pink (7.5YR 7/4); worm casts; fragments. Lab sample # 40A34615; observed in auger, bucket
    C3—315 to 396 centimeters (124.0 to 155.9 inches); fragments. Lab sample # 40A34616; observed in auger, bucket