IDENTIFIERS

  • Current Taxon Name (Soil Name): Straddlebug
  • OSD
  • Series Extent
  • User Site ID: S1995TX043013A
  • User Pedon ID: 95TX043013A
  • Vegetation Plot ID: S1995TX043013A
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 97P0060
  • NCSS Pedon Lab Data NASIS Record ID - 68535
  • Print Date: 9/25/2024

    • 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: 29.8850002
  • Std. Longitude: -103.6872253
  • Datum: WGS84
  • Location Description: Brewster County, Texas; from the junction of US Highway 90 and Texas Highway 118 in Alpine, 32.3 miles south on Texas Highway 118, 7.7 miles west-southwest on 02 Ranch headquarters road, 0.25 miles north on ranch road east of ""The Ditch"", 500 feet northwest of corner of road in range. USGS Duff Springs 7.5 minute topographic quadrangle.
  • Map Unit: SRA—Straddlebug clay loam, 0 to 3 percent slopes
  • Country: US—United States
  • State: Texas
  • County: TX043—Brewster
  • MLRA: 42—Southern Desertic Basins, Plains, and Mountains
  • Regional Office: 8—Phoenix, AZ
  • Non-MLRA Soil Survey Area: TX622—Brewster County, Texas (Main Part)
  • 7.5 Minute USGS Quad: 29103-H6—Duff Springs, Texas

    • PEDON

  • Describers Name: Lynn E. Loomis, Jerry L. Rives, and Alan C. Terrell
  • Current Taxonomic Class: Fine-loamy, mixed, superactive, thermic Sodic Ustic Haplocambids
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 13
  • Correlated Information:
  • Soil Name - Straddlebug
  • PSC - 25 to 100 cm.
  • Classificaton Date - 2/1/2010
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - ustic
  • Sampled As Information:
  • Soil Name - Straddlebug
  • Classificaton Date - 11/11/1995
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Runoff: very low
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/11/1995 (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
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    BOBA3

    BOER4

    BOGR2

    BOGR2

    DICA8

    DICA8

    FLCE

    MUPU2

    MUPU2

    PLMU3

    PLMU3

    PROSO

    SEVU2

    SPAI

    Bothriochloa barbinodis

    Bouteloua eriopoda

    Bouteloua gracilis

    Bouteloua gracilis

    Digitaria californica

    Digitaria californica

    Flourensia cernua

    Muhlenbergia pungens

    Muhlenbergia pungens

    Pleuraphis mutica

    Pleuraphis mutica

    Prosopis

    Setaria vulpiseta

    Sporobolus airoides

    cane bluestem

    black grama

    blue grama

    blue grama

    Arizona cottontop

    Arizona cottontop

    American tarwort

    sandhill muhly

    sandhill muhly

    tobosagrass

    tobosagrass

    mesquite

    plains bristlegrass

    alkali sacaton

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

    ochric epipedon

    cambic horizon

    0—28

    28—203

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    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

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    305

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    18.9

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    A—0 to 10 centimeters (0.0 to 3.9 inches); pinkish gray (7.5YR 6/2), brown (7.5YR 4/2), moist; silty clay loam; moderate medium subangular blocky parts to weak thin platy structure; hard, firm; 3.0 fine and medium roots; 3.0 very fine and fine interstitial pores; 1 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary.; observed in trench. 4 percent calcium carbonate equivalent; 0.8 dS/ m electrical conductivity; moderately alkaline; 3 to 9 inches thick. The A horizon has color with hue of 7.5YR or 10YR, value of 6 or 7, and value of 2 to 4. Texture is loam, sandy clay loam, clay loam, or silty clay loam with a clay content of 24 to 38 percent. Rock fragment content is less than 5 percent by volume.
    Ab—10 to 28 centimeters (3.9 to 11.0 inches); brown (7.5YR 5/2), dark brown (7.5YR 3/2), moist; clay loam; weak coarse prismatic parts to moderate medium and coarse angular blocky structure; hard, firm; 3.0 very fine roots and 3.0 fine roots and 3.0 coarse roots; 3.0 very fine and fine tubular pores; 1 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; gradual smooth boundary.; observed in trench. 7 percent calcium carbonate equivalent; 0.9 dS/m electrical conductivity; moderately alkaline; 0 to 8 inches thick. The Ab horizon, where present, has color with hue of 7.5YR or 10YR value of 4 to 6, and chroma of 2 to 4. Texture is clay loam or silty clay loam with a clay content of 30 to 38 percent. Rock fragment content is less than 5 percent by volume.
    Bwb—28 to 46 centimeters (11.0 to 18.1 inches); brown (7.5YR 5/2), brown (7.5YR 4/2), moist; clay loam; weak coarse prismatic parts to moderate medium and coarse angular blocky structure; hard, firm; 3.0 very fine and fine roots; 0.5 very fine tubular pores; 2 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 97P00368; observed in trench. 9 percent calcium carbonate equivalent; 1.7 dS/m electrical conductivity; moderately alkaline; 7 to 17 inches thick. The Bwb horizon has color with hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 2 to 4. Texture is clay loam or silty clay loam with a clay content of 30 to 39 percent. Rock fragment content is less than 10 percent by volume.
    Bkb1—46 to 66 centimeters (18.1 to 26.0 inches); brown (7.5YR 5/3), brown (7.5YR 4/3), moist; clay loam; weak medium and coarse subangular blocky structure; hard, firm; 0.5 very fine roots; 3.0 very fine tubular pores; 1 percent prominent white (10YR 8/1) carbonate coats on faces of peds; 3 percent medium carbonate masses; 5 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary.; observed in trench. 11 percent calcium carbonate equivalent; 2.6 dS/m electrical conductivity; moderately alkaline; 6 to 18 inches thick. The Bkb horizon has color with hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 2 to 4. This horizon is stratified with thin layers of contrasting textures that range from loamy coarse sand to silty clay. Rock fragments average less than 15 percent by volume, but individual strata may contain up to 45 percent by volume. Calcium carbonate equivalent is less than 15 percent.; discontinuous - phpvsfiid 182855; discontinuous - phpvsfiid 182855
    Bkb2—66 to 84 centimeters (26.0 to 33.1 inches); light brown (7.5YR 6/3), brown (7.5YR 5/3), moist; sandy clay loam; weak medium and coarse subangular blocky structure; hard, firm; 0.5 very fine roots; 3.0 very fine and fine tubular pores; 1 percent prominent white (10YR 8/1) carbonate coats on faces of peds; 3 percent fine carbonate masses; 3 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; gradual smooth boundary.; observed in trench. 12 percent calcium carbonate equivalent; 3.6 dS/m electrical conductivity; moderately alkaline; 0 to 14 inches thick. The horizon has color with hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 2 to 4. This horizon is stratified with thin layers of contrasting textures that range from loamy coarse sand to silty clay. Rock fragments average less than 15 percent by volume, but individual strata may contain up to 45 percent by volume. Calcium carbonate equivalent is less than 15 percent.; discontinuous - phpvsfiid 182856; discontinuous - phpvsfiid 182856
    Bkb3—84 to 117 centimeters (33.1 to 46.1 inches); light brown (7.5YR 6/3), brown (7.5YR 5/3), moist; fine sandy loam; weak medium and coarse subangular blocky structure; slightly hard, friable; 0.5 very fine roots; 0.5 very fine tubular pores; 1 percent prominent white (10YR 8/1) carbonate coats on faces of peds; 3 percent medium carbonate masses; 5 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; gradual smooth boundary.; observed in trench. 6 percent calcium carbonate equivalent; 7.2 dS/m electrical conductivity; moderately alkaline; 0 to 17 inches thick. The Bkb horizon has color with hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 2 to 4. This horizon is stratified with thin layers of contrasting textures that range from loamy coarse sand to silty clay. Rock fragments average less than 15 percent by volume, but individual strata may contain up to 45 percent by volume. Calcium carbonate equivalent is less than 15 percent.; discontinuous - phpvsfiid 194857; discontinuous - phpvsfiid 194857
    Bkb4—117 to 147 centimeters (46.1 to 57.9 inches); light brown (7.5YR 6/3), brown (7.5YR 5/3), moist; fine sandy loam; weak medium and coarse subangular blocky structure; slightly hard, friable; 0.5 very fine roots; 0.5 very fine tubular pores; 1 percent prominent white (10YR 8/1) carbonate coats on faces of peds; 3 percent medium carbonate masses; 5 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; gradual smooth boundary.; observed in trench. 9 percent calcium carbonate equivalent; 8.0 dS/m electrical conductivity; moderately alkaline; 0 to 12 inches thick. The Bkb horizon has color with hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 2 to 4. This horizon is stratified with thin layers of contrasting textures that range from loamy coarse sand to silty clay. Rock fragments average less than 15 percent by volume, but individual strata may contain up to 45 percent by volume. Calcium carbonate equivalent is less than 15 percent.; discontinuous - phpvsfiid 194858; discontinuous - phpvsfiid 194858
    Bkb5—147 to 203 centimeters (57.9 to 79.9 inches); light brown (7.5YR 6/3), brown (7.5YR 5/3), moist; sandy clay loam; weak medium and coarse subangular blocky structure; slightly hard, firm; 0.5 very fine roots; 0.5 very fine tubular pores; 1 percent prominent white (10YR 8/1) carbonate coats on faces of peds; 3 percent medium carbonate masses; 2 percent by volume subangular 2-39-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n.; observed in trench. 7 percent calcium carbonate equivalent; 4.4 dS/m electrical conductivity; moderately alkaline; 0 to 22 inches thick. The Bkb horizon has color with hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 2 to 4. This horizon is stratified with thin layers of contrasting textures that range from loamy coarse sand to silty clay. Rock fragments average less than 15 percent by volume, but individual strata may contain up to 45 percent by volume. Calcium carbonate equivalent is less than 15 percent.; discontinuous - phpvsfiid 194859; discontinuous - phpvsfiid 194859