IDENTIFIERS

  • Current Taxon Name (Soil Name): Pedernales
  • OSD
  • Series Extent
  • User Site ID: S09TX171001
  • User Pedon ID: S09TX171001
  • Vegetation Plot ID: S09TX171001
  • User Site Association ID: Pedernales_DSP_2024
  • Transect:
  • User Transect ID - T10TX319-typical pedons
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 09N0835
  • NCSS Pedon Lab Data NASIS Record ID - 73021
  • Print Date: 1/28/2025

    • 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: 30.2480507
  • Std. Longitude: -98.8968124
  • Datum: WGS84
  • Location Description: Gillespie County, Texas; from the intersection of Highway 87 and Highway 16 in the town of Fredericksburg, 2.4 miles southwest on Highway 16, and 50 feet northwest in pasture
  • Map Unit: PeB—Pedernales fine sandy loam, 1 to 3 percent slopes
  • State: Texas
  • County: TX171—Gillespie
  • MLRA: 81B—Edwards Plateau, Central Part
  • MLRA Soil Survey Area: SC-KER—Kerrville, Texas
  • Non-MLRA Soil Survey Area: TX171—Gillespie County, Texas
  • 7.5 Minute USGS Quad: 30098-B8—Lady Bird Johnson Park, Texas

    • PEDON

  • Describers Name: rd,jam,alb,wg,cs
  • Current Taxonomic Class: Fine, mixed, active, thermic Typic Paleustalfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Pedernales
  • PSC - 30 to 80 cm.
  • Classificaton Date - 2/24/2014
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Pedernales
  • Taxon Kind - series
  • Classificaton Date - 4/20/2009
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: calcareous loamy slope alluvium derived from limestone and sandstone
  • Landscape: alluvial plain remnant
  • Landform: dissected plateau
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: shoulder
  • Slope Position: middle third
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Drainage Class: well
  • Geology: Hensell Sand member of the Kh formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

  • Ecological Sites. (Click Ecological Site ID For Link to EDIT.)
    Ecological Site ID Ecological Site Name Correlation Data Classifier
    R082AY378TX Tight Sandy Loam 25-32 PZ

    • SITE OBSERVATION

  • Observation Date: 4/20/2009 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - hayland
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - sunny
    • 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 % % % % % % % % % % % % %

    Bk1

    115

    155

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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

    Bk1

    115

    155

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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 %

    Bk1

    115

    155

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    41

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

    COCA5

    LEPID

    OPMA8

    SOLAN

    VERBA

    Conyza canadensis

    Lepidium

    Opuntia macrocentra

    Solanum

    Verbascum

    Canadian horseweed

    pepperweed

    purple pricklypear

    nightshade

    mullein

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

    ochric epipedon

    argillic horizon

    abrupt textural change

    calcic horizon

    0—30

    30—115

    30—

    115—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

    1

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    518

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    130

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    Ap1—0 to 17 centimeters (0.0 to 6.7 inches); dark yellowish brown (10YR 4/4), dark yellowish brown (10YR 3/4), moist; loamy sand; 65 percent sand; 23 percent silt; 12 percent clay; weak fine subangular blocky structure; slightly hard, friable, nonsticky, nonplastic; 7.0 very fine roots throughout; 4.0 very fine moderate-continuity irregular pores; fragments; noneffervescent, by hcl, 3n; neutral, pH 7.2; clear smooth boundary. Lab sample # 09N02884; moist when described; observed in pit, large or quarry
    Ap2—17 to 30 centimeters (6.7 to 11.8 inches); dark yellowish brown (10YR 4/4), dark yellowish brown (10YR 3/4), moist; fine sandy loam; 64 percent sand; 20 percent silt; 16 percent clay; weak fine subangular blocky structure; slightly hard, friable, nonsticky, nonplastic; 1.0 fine roots throughout; 1.0 coarse moderate-continuity irregular pores; fragments; noneffervescent, by hcl, 3n; neutral, pH 7.0; abrupt wavy boundary. Lab sample # 09N02885; moist when described; observed in pit, large or quarry
    Bt1—30 to 50 centimeters (11.8 to 19.7 inches); reddish brown (5YR 5/4), reddish brown (5YR 4/4), moist; sandy clay loam; 40 percent sand; 15 percent silt; 45 percent clay; strong medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 1.0 very fine roots throughout; 1.0 very fine moderate-continuity irregular pores; 15 percent faint reddish brown (5YR 4/4), moist, clay films on vertical faces of peds; 10 percent fine prominent irregular noncoherent cemented black (10YR 2/1), moist, iron-manganese masses with sharp boundaries in cracks; fragments; noneffervescent, by hcl, 3n; neutral, pH 6.8; clear smooth boundary. Lab sample # 09N02886; moist when described; observed in pit, large or quarry. continuous - phpvsfiid 473109; continuous - phpvsfiid 473109
    Bt2—50 to 75 centimeters (19.7 to 29.5 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; sandy clay; 30 percent sand; 20 percent silt; 50 percent clay; strong medium subangular blocky structure; very hard, very firm, moderately sticky, moderately plastic; 1.0 very fine roots throughout; 1.0 very fine moderate-continuity irregular pores; 20 percent faint brown (7.5YR 4/3), moist, clay films on vertical faces of peds; 10 percent fine prominent irregular moderately coherent cemented iron-manganese concretions with sharp boundaries in matrix and 40 percent medium prominent irregular noncoherent cemented red (2.5YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; noneffervescent, by hcl, 3n; slightly acid, pH 6.4; clear smooth boundary. Lab sample # 09N02887; moist when described; observed in pit, large or quarry. continuous - phpvsfiid 473110; continuous - phpvsfiid 473110
    Bt3—75 to 115 centimeters (29.5 to 45.3 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; clay; 30 percent sand; 20 percent silt; 50 percent clay; 5 percent dark brown (7.5YR 3/3) coarse distinct mottles; strong medium subangular blocky structure; very hard, very firm, moderately sticky, moderately plastic; 1.0 very fine roots throughout; 1.0 very fine moderate-continuity irregular pores; 10 percent faint yellowish brown (10YR 5/4), moist, clay films on vertical faces of peds; 5 percent medium prominent irregular noncoherent cemented red (2.5YR 4/6), moist, masses of oxidized iron with clear boundaries in matrix and 5 percent fine prominent irregular moderately coherent cemented iron-manganese concretions with sharp boundaries in matrix; fragments; noneffervescent, by hcl, 3n; slightly acid, pH 6.5; clear wavy boundary. Lab sample # 09N02888; moist when described; observed in pit, large or quarry. continuous - phpvsfiid 473111; continuous - phpvsfiid 473111
    Bk1—115 to 155 centimeters (45.3 to 61.0 inches); very pale brown (10YR 8/4), very pale brown (10YR 7/4), moist; clay loam; 30 percent sand; 38 percent silt; 32 percent clay; 10 percent dark yellowish brown (10YR 4/4) fine prominent irregular mottles; weak fine subangular blocky structure; hard, firm, slightly sticky, slightly plastic; 1.0 very fine roots throughout; 1.0 very fine moderate-continuity irregular pores; 5 percent coarse faint irregular moderately coherent cemented very pale brown (10YR 8/2), moist, carbonate concretions with sharp boundaries in matrix and 15 percent coarse faint irregular noncoherent cemented carbonate masses with diffuse boundaries in matrix; fragments; 2 percent krotovinas (volume percent); violent effervescence, by hcl, 3n; slightly alkaline, pH 7.7; gradual wavy boundary. Lab sample # 09N02889; dry when described; observed in pit, large or quarry
    Bk2—155 to 203 centimeters (61.0 to 79.9 inches); light gray (2.5Y 7/2), light brownish gray (2.5Y 6/2), moist; sandy loam; 55 percent sand; 7 percent silt; 38 percent clay; 10 percent strong brown (7.5YR 4/6) medium distinct and 20 percent olive brown (2.5Y 4/4) medium distinct and 20 percent light olive brown (2.5Y 5/6) medium distinct mottles; weak fine subangular blocky structure; hard, firm, slightly sticky, slightly plastic; 1.0 very fine roots throughout; 1.0 very fine moderate-continuity irregular pores; 40 percent coarse distinct irregular noncoherent cemented very pale brown (10YR 8/2), moist, carbonate masses with diffuse boundaries in matrix; fragments; violent effervescence, by hcl, 3n; moderately alkaline, pH 8.0. Lab sample # 09N02890; dry when described; observed in pit, large or quarry