IDENTIFIERS

  • Current Taxon Name (Soil Name): Ector
  • OSD
  • Series Extent
  • User Site ID: S1992TX137001
  • User Pedon ID: 92TX137001
  • Vegetation Plot ID: S1992TX137001
  • User Site Association ID: 8832
  • Transect:
  • User Transect ID - E261
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 92P0471
  • NCSS Pedon Lab Data NASIS Record ID - 64710
  • Print Date: 6/3/2024

    • 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: 30.2875004
  • Std. Longitude: -100.3680573
  • Datum: WGS84
  • Location Description: .65 miles E past trail, .5 miles SE on ranch trail, 30 feet W in rangeland.
  • Map Unit: ErB—Ector gravelly silty clay loam, 1 to 3 percent slopes
  • State: Texas
  • County: TX137—Edwards
  • MLRA: 81A—Edwards Plateau, Western Part
  • Non-MLRA Soil Survey Area: TX607—Edwards and Real Counties, Texas
  • 7.5 Minute USGS Quad: 30100-C4—Harrison Ranch, Texas

    • PEDON

  • Describers Name: W.J. Gabriel, L.E. Loomis, S.R. Albee
  • Current Taxonomic Class: Loamy-skeletal, carbonatic, thermic Lithic Calciustolls
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Ector
  • Taxonomic Class - Loamy-skeletal, carbonatic, thermic Lithic Calciustolls
  • Taxon Kind - series
  • PSC - 0 to 18 cm.
  • Classificaton Date - 2/11/1992
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: plains
  • Landform: hillside
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Bedrock: h slight weathered limestone, unspecified with 10 to <45
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 2/11/1992 (actual site observation date)
  • Air Photo ID: 3
  • 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

    ARIST

    ARIST

    DICOC

    ERPI5

    MATR3

    VEPO4

    Aristida

    Aristida

    Digitaria cognata var. cognata

    Erioneuron pilosum

    Mahonia trifoliolata

    Verbena polystachya

    threeawn

    threeawn

    Carolina crabgrass

    hairy woollygrass

    algerita

    verbena

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    mollic epipedon

    calcic horizon

    lithic contact

    0—18

    0—18

    18—38

    —-

    —-

    —-
    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

    3

    12

    30.5

    700

    —

    315

    559

    —

    —

    18.3

    26.7

    8.9

    —

    —

    —

    —

    —

    TX424

    Sonora, Texas

    Official U.S.
    A—0 to 8 centimeters (0.0 to 3.1 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; gravelly silty clay loam; 36 percent clay; moderate fine and medium subangular blocky parts to moderate very fine subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 3.0 very fine and fine roots throughout and 0.5 medium roots throughout; 3.0 very fine and fine high-continuity interstitial and 0.5 very fine moderate-continuity tubular pores; 30 percent distinct pale brown (10YR 6/3) carbonate coats on rock fragments; 5 percent by volume subangular 75-162-250 millimeter limestone, unspecified fragments and 20 percent by volume subangular 2-39-75 millimeter limestone, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 92P02860; moist when described;. weakly cemented lime coats, mainly on lower surface of rock fragments; discontinuous - phpvsfiid 1153317; discontinuous - phpvsfiid 1153317
    Ak—8 to 18 centimeters (3.1 to 7.1 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; extremely gravelly silty clay loam; 35 percent clay; moderate very fine and fine subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 3.0 very fine and fine roots throughout and 0.5 medium roots throughout; 3.0 very fine and fine high-continuity interstitial and 0.5 very fine moderate-continuity tubular pores; 75 percent distinct pale brown (10YR 6/3) carbonate coats on rock fragments; 15 percent by volume subangular 75-162-250 millimeter limestone, unspecified fragments and 52 percent by volume subangular 2-39-75 millimeter limestone, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 92P02861; moist when described;. strongly cemented lime coats up to 3/10"""" thick on lower surface of rock fragments; discontinuous - phpvsfiid 1153318; discontinuous - phpvsfiid 1153318
    Rk—18 centimeters (7.1 inches);, 60 percent very pale brown (10YR 8/2) and 40 percent yellowish brown (10YR 5/6), moist; unweathered bedrock; indurated; 75 percent distinct very pale brown (10YR 7/4) carbonate coats on upper surfaces of peds or rocks; fragments. buda limestone, upper member, nodular with interclast fractures 10"""" apart; lime coats are .05"""" on convex, 0.2"""" on concave, and even thicker in fractures; (10YR 6/6) and (10YR 5/6) weakly cemented secondary lime seams up to 0.4"""" thick between indurated planes of weakness; cobble-size nodular limestone clasts; continuous - phpvsfiid 1153319; continuous - phpvsfiid 1153319