IDENTIFIERS

  • Current Taxon Name (Soil Name): PIEDRAS
  • OSD
  • Series Extent
  • User Site ID: S1998TX131004
  • User Pedon ID: 98TX131004
  • Vegetation Plot ID: S1998TX131004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 99P0130
  • NCSS Pedon Lab Data NASIS Record ID - 10989
  • Print Date: 1/25/2025

    • 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: 27.6996937
  • Std. Longitude: -98.5103607
  • Datum: WGS84
  • Location Description: Duval County Texas; from the intersection of TX HWY 359 and TX Hwy 339 in Benavides; northeast 10.3 mile on TX Hwy 339, west 0.2 mile on private ranch road, 0.3 mile southeast and 0.4 mile south on ranch road; site is 40 feet east in rangeland.
  • State: Texas
  • County: TX131—Duval
  • MLRA: 83D—Lower Rio Grande Plain
  • Non-MLRA Soil Survey Area: TX131—Duval County, Texas
  • 7.5 Minute USGS Quad: 27098-F5—Parrilla Creek NE, Texas

    • PEDON

  • Describers Name: RM, DNB, SD, AS, PHD
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 4
  • Sampled As Information:
  • Soil Name - PIEDRAS
  • Taxonomic Class - Loamy-skeletal, mixed Typic Haplustults
  • PSC - 0 to 39 cm.
  • Classificaton Date - 10/28/1998
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Geomorphic Component Hills: interfluve
  • Hill Slope Profile: summit
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/28/1998 (actual site observation date)
  • Air Photo ID: AS. 21A
  • 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
  • Site Erosion Accelerated: water erosion
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    ACBE

    OPUNT

    OPUNT

    TEUR

    Acacia berlandieri

    Opuntia

    Opuntia

    Tetrazygia urbanii

    guajillo

    pricklypear

    pricklypear

    cenizo

    —

    —

    —

    —

    —

    —

    —

    —

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

    ochric epipedon

    petrocalcic horizon

    0—8

    39—200

    —-

    —-
    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

    —

    —

    166

    —

    135

    610

    —

    —

    22.8

    —

    —

    —

    —

    —

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    —

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    A—0 to 14 centimeters (0.0 to 5.5 inches); dark brown (7.5YR 3/4), dark brown (7.5YR 3/4), moist; gravelly fine sandy loam; moderate medium subangular blocky structure; soft, friable; 7.0 fine and medium roots throughout and 1.0 coarse roots throughout; 1.0 very fine tubular pores; fragments; noneffervescent, by hcl, unspecified; neutral, pH 7.2, hellige-truog; clear smooth boundary. Lab sample # 99P00665. 10% gravel
    ABk—14 to 39 centimeters (5.5 to 15.4 inches); brown (7.5YR 4/4) and very pale brown (10YR 8/3), brown (7.5YR 4/4), moist; very channery fine sandy loam; weak fine subangular blocky, and weak fine granular structure; soft, friable; 7.0 fine and medium roots throughout and 1.0 coarse roots throughout; 1.0 very fine tubular pores; fragments; violent effervescence, by hcl, unspecified; neutral, pH 7.3, hellige-truog; abrupt smooth boundary. Lab sample # 99P00666. 60% total - 45% channers & 15% gravels
    Bkm1—39 to 59 centimeters (15.4 to 23.2 inches); very pale brown (10YR 7/3) and black (10YR 2/1) and 60 percent white (10YR 8/1) and 40 percent very pale brown (10YR 7/3); 2 percent fine irregular light red (10R 6/6) masses of oxidized iron in cracks; fragments; clear smooth boundary. Lab sample # 99P00667
    Bkm2—59 to 136 centimeters (23.2 to 53.5 inches); 50 percent white (10YR 8/1) and 50 percent light gray (10YR 7/2) coprogenous earth; 3.0 very fine and fine roots in cracks and 1.0 coarse roots in cracks; 1 percent fine spherical black (10YR 2/1) iron-manganese masses and 5 percent fine irregular red (2.5YR 5/8) masses of oxidized iron in cracks; fragments; clear smooth boundary. Lab sample # 99P00668
    Bkm3—136 to 200 centimeters (53.5 to 78.7 inches); light gray (10YR 7/2) coprogenous earth; 1.0 very fine roots in cracks; 1 percent fine spherical black (10YR 2/1) iron-manganese masses and 2 percent medium irregular yellowish red (5YR 5/8) masses of oxidized iron in cracks and 5 percent fine and medium irregular reddish yellow (5YR 6/8) masses of oxidized iron in cracks; 20 percent carbonate nodules in cracks; fragments. Lab sample # 99P00669