IDENTIFIERS

  • Current Taxon Name (Soil Name): Karnes
  • OSD
  • Series Extent
  • User Site ID: S2019TX267002
  • User Pedon ID: S2019TX267002
  • Vegetation Plot ID: S2019TX267002
  • Transect:
  • User Transect ID - T2019TX2675001
  • Transect Stop Number - 1
  • Transect Interval - 42.0
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 19N0468
  • Print Date: 12/9/2025

    • 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: 30.5218200
  • Std. Longitude: -99.7341100
  • Datum: WGS84
  • Map Unit: RbF—Real-Brackett complex, hilly
  • Country: US—United States
  • State: Texas
  • County: TX267—Kimble
  • MLRA: 81B—Edwards Plateau, Central Part
  • Non-MLRA Soil Survey Area: TX267—Kimble County, Texas
  • 7.5 Minute USGS Quad: 30099-E6—Big Draw, Texas

    • PEDON

  • Describers Name: Daniel Hirmas, Stephen Hasiotis, Donald McGahan, Chance Robinson
  • Current Taxonomic Class: Coarse-loamy, carbonatic, thermic Typic Calciustepts
  • Current Taxon Kind: series
  • Pedon Type: not classified to current taxon name
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Pedon PC 6.2
  • Pedon #: 2
  • Sampled As Information:
  • Soil Name - Karnes
  • Taxonomic Class - Coarse-loamy, carbonatic, thermic Typic Calciustepts
  • Taxon Kind - series
  • PSC - 25 to 100 cm.
  • Classificaton Date - 6/27/2019
  • Classifier - Chance Robinson
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - ustic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Class - bare mineral soil
  • Pedoderm Loose Cover Indicator - no
  • Biol. Crust Type Dominant - algae
  • Biol. Crust Type Secondary - cyanobacteria
  • Phys Crust Subtype - raindrop impact crust
  • Crust Dev Class - weak
  • Hydric: no


    • SITE

  • Parent Material: calcareous loamy slope alluvium over loamy slope alluvium derived from mudstone over displaced residuum weathered from limestone
  • Landscape: dissected plateau
  • Landform: ejecta blanket of meteorite crater
  • Hill Slope Profile: shoulder
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments: 5.00 percent nonflat subangular indurated 2- to 75-millimeter petrocalcic fragments, 30.00 percent nonflat subangular indurated 2- to 75-millimeter limestone, unspecified, 15.00 percent nonflat subangular indurated 2- to 75-millimeter chert, 1.00 percent nonflat subangular indurated 75- to 250-millimeter limestone, unspecified, 1.00 percent nonflat subangular indurated 75- to 250-millimeter chert,
  • Benchmark Soil?: no

    • VEGETATION

  • Ecological Sites. (Click Ecological Site ID For Link to EDIT.)
    Ecological Site ID Ecological Site Name Correlation Data Classifier
    R081BY326TX Clay Loam 23-31 PZ Jun 28 2019 Chance Robinson
  • Ecological State: 1 - Grassland
  • Community Phase: 2 - Shortgrass Savannah

    • SITE OBSERVATION

  • Observation Date: 6/27/2019 (actual site observation date)
  • Data Collector: Chance Robinson
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, grassland
  • Res. Retention Class - class 3
  • Pedoderm Class - bare mineral soil
  • Pedoderm Loose Cover Indicator - no
  • Biol. Crust Type Dominant - algae
  • Biol. Crust Type Secondary - cyanobacteria
  • Crust Dev Class - weak
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • 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 % % % % % % % % % % % % %

    A1

    A2

    Bk1

    Bk2

    Bk3

    2Btk

    3Bk

    0

    8

    16

    34

    83

    115

    149

    8

    16

    34

    83

    115

    149

    197

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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

    A1

    A2

    Bk1

    Bk2

    Bk3

    2Btk

    3Bk

    0

    8

    16

    34

    83

    115

    149

    8

    16

    34

    83

    115

    149

    197

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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 %

    A1

    A2

    Bk1

    Bk2

    Bk3

    2Btk

    3Bk

    0

    8

    16

    34

    83

    115

    149

    8

    16

    34

    83

    115

    149

    197

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    Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    NOLIN

    YUPA

    YUTO

    ASTER

    2SD

    DITE3

    JUPI

    MATR3

    PSORO

    YUAR2

    2FP

    COVI8

    LEFR3

    ARPUW

    Nolina

    Yucca pallida

    Yucca torreyi

    Aster

    —

    Diospyros texana

    Juniperus pinchotii

    Mahonia trifoliolata

    Psorothamnus

    Yucca arkansana

    —

    Condalia viridis

    Leucophyllum frutescens

    Aristida purpurea var. wrightii

    beargrass

    twistleaf yucca

    Torrey's yucca

    aster

    Shrub, deciduous

    Texas persimmon

    Pinchot's juniper

    algerita

    dalea

    Arkansas yucca

    Forb, perennial

    green snakewood

    Texas barometer bush

    Wright's threeawn

    shrub/vine

    shrub/vine

    shrub/vine

    forb

    shrub/vine

    shrub/vine

    shrub/vine

    shrub/vine

    shrub/vine

    shrub/vine

    forb

    shrub/vine

    shrub/vine

    grass/grasslike

    1

    1

    1

    1

    2

    2

    2

    2

    2

    2

    2

    7

    7

    7

    understory

    understory

    understory

    understory

    overstory

    overstory

    overstory

    overstory

    understory

    understory

    understory

    overstory

    overstory

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

    ochric epipedon

    free carbonates

    cambic horizon

    secondary carbonates

    calcic horizon

    lithologic discontinuity

    lithologic discontinuity

    0—16

    0—197

    16—34

    16—197

    34—83

    115—115

    149—149

    —-

    —-

    —-

    —-

    —-

    —-

    —-
    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

    7

    131

    18

    543

    —

    90

    623

    —

    207

    17.8

    26.6

    8.4

    —

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    36

    414670

    JUNCTION 4SSW

    COOP
    A1—0 to 8 centimeters (0.0 to 3.1 inches); pale brown (10YR 6/3), light olive brown (2.5Y 5/3), moist; gravelly loam; 21 percent clay; strong very thick platy parts to weak coarse subangular blocky parts to weak medium subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; low excavation difficulty; 2 percent distinct carbonate coats on rock fragments; 2 percent by volume nonflat angular indurated 20-50-75 millimeter chert fragments observed by visual inspection method and 5 percent by volume nonflat subangular indurated 2-3-5 millimeter limestone, unspecified fragments and 10 percent by volume nonflat subangular indurated 5-30-75 millimeter petrocalcic fragments fragments; violent effervescence; clear smooth boundary. Lab sample # 19N03028; dry when described; observed in pit, small
    A2—8 to 16 centimeters (3.1 to 6.3 inches); pale yellow (2.5Y 7/3), light olive brown (2.5Y 5/4), moist; loam; 18 percent clay; weak medium subangular blocky parts to weak fine subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; low excavation difficulty; 10 percent distinct white (2.5Y 8/1), dry, and pale yellow (2.5Y 8/2), moist, carbonate coats on rock fragments; 10 percent by volume nonflat angular indurated 20-50-75 millimeter chert fragments observed by visual inspection method; violent effervescence; clear smooth boundary. Lab sample # 19N03029; dry when described; observed in pit, small
    Bk1—16 to 34 centimeters (6.3 to 13.4 inches); very pale brown (10YR 7/4), pale brown (10YR 6/3), moist; loam; 21 percent clay; weak coarse subangular blocky parts to weak medium subangular blocky parts to moderate fine subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; low excavation difficulty; 5 percent distinct pale yellow (2.5Y 7/3), moist, carbonate coats on rock fragments; 3 percent very fine distinct irregular noncoherent cemented pale yellow (5Y 8/2), moist, and white (2.5Y 8/1), dry, carbonate masses with clear boundaries between peds; 2 percent by volume nonflat subangular indurated 5-30-75 millimeter petrocalcic fragments fragments and 3 percent by volume nonflat angular indurated 20-50-75 millimeter chert fragments observed by visual inspection method; violent effervescence; gradual wavy boundary. Lab sample # 19N03030; dry when described; observed in pit, small
    Bk2—34 to 83 centimeters (13.4 to 32.7 inches); pale yellow (2.5Y 7/3), pale yellow (2.5Y 7/3), moist; gravelly loam; 16 percent clay; weak medium subangular blocky parts to weak fine subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; low excavation difficulty; 15 percent distinct carbonate coats on rock fragments; 5 percent very fine distinct threadlike noncoherent cemented white (2.5Y 8/1), dry, carbonate masses with clear boundaries between peds; 5 percent by volume nonflat angular indurated 20-50-75 millimeter chert fragments observed by visual inspection method and 10 percent by volume nonflat angular indurated 2-10-20 millimeter chert fragments observed by visual inspection method; violent effervescence; gradual smooth boundary. Lab sample # 19N03031; dry when described; observed in pit, small
    Bk3—83 to 115 centimeters (32.7 to 45.3 inches); pale yellow (2.5Y 8/3), pale yellow (2.5Y 7/4), moist; loam; 26 percent clay; weak medium subangular blocky parts to moderate fine subangular blocky structure; moderately hard, friable, moderately sticky, slightly plastic; moderate excavation difficulty; 1 percent distinct carbonate coats on rock fragments; 1 percent fine distinct threadlike noncoherent cemented white (2.5Y 8/1), dry, carbonate masses with clear boundaries between peds; 1 percent by volume nonflat subangular indurated 2-48-75 millimeter petrocalcic fragments fragments and 2 percent by volume nonflat subrounded indurated 2-48-75 millimeter shell fragments fragments and 5 percent by volume nonflat subangular indurated 2-48-75 millimeter limestone, unspecified fragments; violent effervescence; clear smooth boundary. Lab sample # 19N03032; dry when described; observed in pit, small
    2Btk—115 to 149 centimeters (45.3 to 58.7 inches); very pale brown (10YR 7/3), light yellowish brown (10YR 6/4), moist; gravelly clay loam; 28 percent clay; weak medium subangular blocky parts to moderate fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; high excavation difficulty; clay films on all faces of peds; 10 percent very fine distinct threadlike noncoherent cemented carbonate masses with clear boundaries between peds; 5 percent by volume nonflat subangular indurated 2-48-75 millimeter limestone, unspecified fragments and 10 percent by volume nonflat subrounded indurated 2-48-75 millimeter petrocalcic fragments fragments; strong effervescence; clear smooth boundary. Lab sample # 19N03033; dry when described; observed in pit, small
    3Bk—149 to 197 centimeters (58.7 to 77.6 inches); very pale brown (10YR 8/2), very pale brown (10YR 7/4), moist; very cobbly loam; 15 percent clay; weak medium subangular blocky parts to weak fine subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; very high excavation difficulty; 50 percent distinct carbonate coats on rock fragments; 3 percent coarse distinct cylindrical noncoherent cemented very pale brown (10YR 8/3), dry, carbonate masses with clear boundaries between peds and 4 percent medium distinct rosette-like noncoherent cemented very pale brown (10YR 8/3), dry, carbonate masses with clear boundaries between peds; 10 percent by volume nonflat subangular strongly coherent cemented 2-48-75 millimeter limestone, unspecified fragments and 40 percent by volume nonflat subangular strongly coherent cemented 75-162-250 millimeter limestone, unspecified fragments; violent effervescence. Lab sample # 19N03034; dry when described; observed in pit, small