IDENTIFIERS

  • Current Taxon Name (Soil Name): Straddlebug
  • OSD
  • Series Extent
  • User Site ID: S1995-TX043-013-copy
  • User Pedon ID: S1995-TX043-013-copy
  • Vegetation Plot ID: S1995-TX043-013-copy
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 98P0431
  • NCSS Pedon Lab Data NASIS Record ID - 10701
  • Print Date: 11/21/2024

    • 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: 29.8858389
  • Std. Longitude: -103.6859750
  • Datum: WGS84
  • Location Description: Brewster County, Texas; from the junction of US Highway 90 and Texas Highway 118 in Alpine, 33.6 miles south on Texas Highway 118, 7.7 miles west-southwest on ranch road, 0.25 miles north on ranch road east of ""The Ditch"", then 500 feet northwest of corner of road in range.
  • 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
  • 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 Loomis, Jerry Rives, and Alan Terrell
  • Current Taxonomic Class: Fine-loamy, mixed, superactive, thermic Sodic Ustic Haplocambids
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 13
  • Correlated Information:
  • Soil Name - Straddlebug (flagged as OSD)
  • PSC - 25 to 100 cm.
  • Classificaton Date - 2/1/2013
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - ustic
  • Sampled As Information:
  • Soil Name - Straddlebug
  • Taxonomic Class - Fine-loamy, mixed, superactive, thermic Sodic Usti
  • Taxon Kind - series
  • Classificaton Date - 11/11/1995
  • Moisture Class - aridic (torric)
  • Moisture SUBClass - ustic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: zeolitic and sodic loamy alluvium derived from tuff
  • Runoff: very low
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 3/1/1995 (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

    BOCU

    BOER4

    BOGR2

    DICA8

    FLCE

    LATR2

    MUAR2

    PLMU3

    PRGLT

    SCBR2

    SEVU2

    SPAI

    Bothriochloa barbinodis

    Bouteloua curtipendula

    Bouteloua eriopoda

    Bouteloua gracilis

    Digitaria californica

    Flourensia cernua

    Larrea tridentata

    Muhlenbergia arenicola

    Pleuraphis mutica

    Prosopis glandulosa var. torreyana

    Scleropogon brevifolius

    Setaria vulpiseta

    Sporobolus airoides

    cane bluestem

    sideoats grama

    black grama

    blue grama

    Arizona cottontop

    American tarwort

    creosote bush

    sand muhly

    tobosagrass

    western honey mesquite

    burrograss

    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—200

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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

    1.1

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    1176.5

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    344

    572

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    17.6

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    PRISM

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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; clay loam; moderate medium subangular blocky parts to weak thin platy structure; hard when dry, firm; 3.0 fine and medium roots; 3.0 very fine and fine interstitial pores; 1 percent by volume subangular 2-?-75 millimeter tuff, unspecified fragments; silty clay loam of field estimated texture class; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 98P02492; 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; weak coarse prismatic parts to moderate medium and coarse angular blocky structure; hard when dry, 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-?-75 millimeter tuff, unspecified fragments; clay loam of field estimated texture class; violent effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 98P02493; 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; weak coarse prismatic parts to moderate medium and coarse angular blocky structure; hard when dry, 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; clay loam of field estimated texture class; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 98P02494; 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. Also sampled as 97P0368.
    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 when dry, 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; clay loam of field estimated texture class; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 98P02495; 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 1209687; discontinuous - phpvsfiid 1209687
    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 when dry, 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; sandy clay loam of field estimated texture class; violent effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 98P02496; 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 1209688; discontinuous - phpvsfiid 1209688
    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; sandy loam of field estimated texture class; violent effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 98P02497; 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 1209689; discontinuous - phpvsfiid 1209689
    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; sandy loam of field estimated texture class; violent effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 98P02498; 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 1209690; discontinuous - phpvsfiid 1209690
    Bkb5—147 to 200 centimeters (57.9 to 78.7 inches); light brown (7.5YR 6/3), brown (7.5YR 5/3), moist; 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; sandy clay loam of field estimated texture class; violent effervescence, by hcl, 1n. Lab sample # 98P02499; 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 1209691; discontinuous - phpvsfiid 1209691