IDENTIFIERS

  • Current Taxon Name (Soil Name): Borunda
  • OSD
  • Series Extent
  • User Site ID: S0x-TX043-Borunda
  • User Pedon ID: Sxx-TX622-Borunda
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 98P0418
  • NCSS Pedon Lab Data NASIS Record ID - 10688
  • Print Date: 12/7/2025

    • 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: 29.8100700
  • Std. Longitude: -103.6237793
  • Datum: WGS84
  • Location Description: Brewster County, Texas; from the junction of US Highway 90 and Texas Highway 118 in Alpine, 41.1 miles south on Texas Highway 118 to gate, 2.9 miles west on ranch road, 75 feet south of road in rangeland.
  • Map Unit: BOC—Borunda soils, 1 to 8 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-G5—Buck Hill, Texas

    • PEDON

  • Describers Name: Lynn Loomis, Jerry Rives, and Alan Terrell
  • Current Taxonomic Class: Fine, mixed, superactive, thermic Ustic Calcigypsids
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Correlated Information:
  • Soil Name - Borunda
  • PSC - 25 to 71 cm.
  • Classificaton Date - 1/5/2011
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - ustic
  • Sampled As Information:
  • Soil Name - Borunda
  • Classificaton Date - 6/26/2008
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: residuum weathered from tuff
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Drainage Class: well
  • Bedrock: moderately coherent tuff, unspecified at 71cm
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/26/2008 (entry creation date)
  • Air Photo ID:
  • 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
  • Yield Study ID -
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    A

    A

    Bk

    Bk

    Bk

    Bky

    Bky

    Bky

    Bky

    Crk

    Crk

    Crk

    Rk

    Rk

    R

    R

    0

    0

    8

    8

    8

    30

    30

    30

    30

    71

    71

    71

    101

    101

    130

    130

    8

    8

    —

    30

    30

    —

    71

    71

    71

    101

    101

    101

    130

    130

    157

    157

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    24

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    9

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    A

    A

    Bk

    Bk

    Bk

    Bky

    Bky

    Bky

    Bky

    Crk

    Crk

    Crk

    Rk

    Rk

    R

    R

    0

    0

    8

    8

    8

    30

    30

    30

    30

    71

    71

    71

    101

    101

    130

    130

    8

    8

    —

    30

    30

    —

    71

    71

    71

    101

    101

    101

    130

    130

    157

    157

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    A

    A

    Bk

    Bk

    Bk

    Bky

    Bky

    Bky

    Bky

    Crk

    Crk

    Crk

    Rk

    Rk

    R

    R

    0

    0

    8

    8

    8

    30

    30

    30

    30

    71

    71

    71

    101

    101

    130

    130

    8

    8

    —

    30

    30

    —

    71

    71

    71

    101

    101

    101

    130

    130

    157

    157

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    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

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    19

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    38

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    26

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    6

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    8

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    36

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    28

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

    bedrock, paralithic

    bedrock, lithic

    moderately coherent

    strongly coherent

    71 - 101

    101 - 157

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

    ochric epipedon

    calcic horizon

    gypsic horizon

    paralithic contact

    lithic contact

    0—8

    8—71

    30—71

    71—101

    101—157

    —-

    —-

    —-

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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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    1131

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    305

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    18.9

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    A—0 to 8 centimeters (0.0 to 3.1 inches); light brown (7.5YR 6/3), brown (7.5YR 5/3), moist; loam; 25 percent clay; weak thin platy parts to weak fine subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 3.0 very fine and fine roots; 3.0 very fine and fine vesicular pores; 5 percent by volume rounded indurated 2-15-75 millimeter chert fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 7.9, pH meter, saturated paste; clear smooth boundary.; observed in trench
    Bk—8 to 30 centimeters (3.1 to 11.8 inches); pinkish gray (7.5YR 7/2), light brown (7.5YR 6/3), moist; clay; 50 percent clay; weak medium and coarse subangular blocky parts to weak fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 4.0 very fine and fine roots and 2.0 medium roots; 4.0 very fine and fine tubular and 2.0 medium tubular pores; 2 percent distinct carbonate coats on all faces of peds; 1 percent fine threadlike carbonate masses; 2 percent by volume rounded indurated 2-15-75 millimeter chert fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter, saturated paste; clear smooth boundary.; observed in trench
    Bky—30 to 71 centimeters (11.8 to 28.0 inches); pinkish gray (7.5YR 7/2), light brown (7.5YR 6/3), moist; clay; 50 percent clay; weak medium and coarse subangular blocky parts to weak fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 0.8 very fine and fine roots; 4.0 very fine and fine tubular and 2.0 medium tubular pores; 10 percent distinct white (10YR 8/1), dry, carbonate coats on all faces of peds and 30 percent distinct white (10YR 8/1), dry, carbonate coats on rock fragments; 5 percent coarse irregular white (10YR 8/1), dry, carbonate masses and 2 percent fine threadlike white (10YR 8/1), dry, carbonate masses and 2 percent fine gypsum crystals, unspecified; 2 percent by volume nonflat rounded indurated 2-15-75 millimeter chert fragments and 20 percent by volume nonflat subangular weakly coherent cemented 2-15-75 millimeter tuff, unspecified fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 7.9, pH meter, saturated paste; clear wavy boundary.; observed in trench. tuff fragments are concentrated in old krotovinas.; discontinuous - phpvsfiid 407170; discontinuous - phpvsfiid 407169; discontinuous - phpvsfiid 407170; discontinuous - phpvsfiid 407169
    Crk—71 to 101 centimeters (28.0 to 39.8 inches); light gray (10YR 7/1), gray (10YR 5/1), moist; bedrock; structureless massive; moderately coherent; 0.8 very fine and fine roots in cracks; 7 percent prominent white (10YR 8/1), dry, carbonate coats on tops of rock fragments; 3 percent coarse irregular white (10YR 8/1), dry, carbonate masses in cracks and 3 percent fine threadlike white (10YR 8/1), dry, carbonate masses in cracks; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter, saturated paste; clear smooth boundary.; observed in trench
    Rk—101 to 130 centimeters (39.8 to 51.2 inches); light gray (10YR 7/1), gray (10YR 5/1), moist; bedrock; structureless massive; strongly coherent; 0.5 very fine and fine roots in cracks; 5 percent prominent white (10YR 8/1), dry, carbonate coats on bedrock; 3 percent fine threadlike white (10YR 8/1), dry, carbonate masses in cracks; fragments; strong effervescence, by hcl, 1n; clear smooth boundary.; observed in trench
    R—130 to 157 centimeters (51.2 to 61.8 inches); light gray (10YR 7/1), gray (10YR 5/1), moist; bedrock; structureless massive; strongly coherent; 0.1 very fine and fine roots in cracks; fragments; strong effervescence, by hcl, 1n.; observed in trench