IDENTIFIERS

  • Current Taxon Name (Soil Name): Laredo
  • OSD
  • Series Extent
  • User Site ID: S2002-TX505-003
  • User Pedon ID: 02TX505003
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 03N0179
  • NCSS Pedon Lab Data NASIS Record ID - 15690
  • User Project ID: C2003USTX037
  • Project Name: Duval Starr and Zapata Co South Texas
  • Print Date: 12/4/2024

    • 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: 27.0341110
  • Std. Longitude: -99.4320831
  • Datum: WGS84
  • Location Description: From the intersections of US highway 83 and Texas State Highway 16 in Zapata, Tx. 13.6 miles north on US highway 83, 300 feet west on private farm road, .1 mile southwest on private farm road, and 80 feet east in cropland.
  • Country: US—United States
  • State: Texas
  • County: TX505—Zapata
  • MLRA: 83B—Western Rio Grande Plain
  • Regional Office: SC—South Central
  • Non-MLRA Soil Survey Area: TX505—Zapata County, Texas
  • 7.5 Minute USGS Quad: 27099-A4—San Ygnacio, Texas

    • PEDON

  • Describers Name: Ramiro Molina, Nathan Haile, Maurice Jurena, Paul Holland, Jamey Douglass, Wayne Gabriel, Dennis Brezina
  • Current Taxonomic Class: Fine, mixed, superactive, calcareous, hyperthermic Torrertic Haplustolls
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 3
  • Sampled As Information:
  • Soil Name - Laredo
  • Taxonomic Class - Fine, mixed, superactive, calcareous, hyperthermic Torrertic Haplustolls
  • PSC - 25 to 100 cm.
  • Classificaton Date - 10/9/2002
  • Soil Taxonomic Edition - eighth edition
  • Moisture SUBClass - aridic (torric)
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: very low
  • Drainage Class: well
  • Flooding: none flooding
  • Geology: Fluviatile Terrace Deposits formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/9/2002 (actual site observation date)
  • Air Photo ID: B5
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - overcast
  • Current Air Temp - 32
    • 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

    0.5

    —

    —

    102.3

    —

    215

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 18 centimeters (0.0 to 7.1 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; silty clay; moderate fine subangular blocky structure; slightly hard, friable; 5.0 very fine roots throughout and 3.0 fine roots throughout; 3.0 very fine pores; 5 percent distinct worm casts in matrix; 1 percent by volume chert fragments; slight effervescence, by hcl, 1n; slightly alkaline, pH 7.8; clear smooth boundary. Lab sample # 03N00949. Worm casts described are distict 10yr 4/3 found in matrix
    A—18 to 30 centimeters (7.1 to 11.8 inches);, very dark grayish brown (10YR 3/2), moist; silty clay; moderate medium subangular blocky structure; very hard, firm; 3.0 very fine roots throughout and 2.0 fine roots throughout; 3.0 very fine tubular pores; 10 percent distinct pressure faces; 1 percent fine iron-manganese concretions; 3 percent fine carbonate masses; 1 percent by volume 2-?-5 millimeter chert fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.0; gradual smooth boundary. Lab sample # 03N00950
    Bw—30 to 66 centimeters (11.8 to 26.0 inches);, very dark grayish brown (10YR 3/2), moist; clay; 50 percent clay; strong medium angular blocky structure; very hard, very firm; 3.0 very fine roots throughout; 30 percent prominent pressure faces; 1 percent very fine salt masses; 1 percent by volume 2-2-3 millimeter chert fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1; clear smooth boundary. Lab sample # 03N00951. Along with pressure faces , 40% wedge shaped aggregates are descibed
    Bk1—66 to 99 centimeters (26.0 to 39.0 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; clay; 45 percent clay; moderate coarse prismatic parts to moderate medium angular blocky structure; extremely hard, very firm; 3.0 very fine roots throughout; 3.0 very fine pores; 15 percent distinct pressure faces; 5 percent fine carbonate masses and 4 percent fine prominent salt masses; 1 percent by volume 2-2-3 millimeter chert fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1; clear smooth boundary. Lab sample # 03N00952. Also described are 30% distinct wedge shaped aggragates; prominent 10yr 8/1 salt threads
    Bk2—99 to 123 centimeters (39.0 to 48.4 inches);, brown (10YR 4/3), moist; clay; 43 percent clay; moderate medium subangular blocky structure; extremely hard, very firm; 2.0 very fine roots throughout; 2.0 very fine tubular pores; 2 percent distinct pressure faces; 4 percent fine carbonate masses and 3 percent fine prominent salt masses throughout and 2 percent very fine carbonate concretions; 1 percent by volume 2-?-3 millimeter chert fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.2; clear smooth boundary. Lab sample # 03N00953
    Bk3—123 to 145 centimeters (48.4 to 57.1 inches); light yellowish brown (10YR 6/4), brown (10YR 4/3), moist; clay loam; 40 percent clay; moderate fine subangular blocky structure; slightly hard, firm; 1.0 very fine roots throughout; 1.0 very fine tubular pores; 1 percent fine carbonate concretions and 5 percent fine threadlike carbonate masses; 1 percent by volume 2-?-3 millimeter chert fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.2; gradual smooth boundary. Lab sample # 03N00954
    Bk4—145 to 168 centimeters (57.1 to 66.1 inches);, yellowish brown (10YR 5/4), moist; sandy clay loam; moderate fine subangular blocky structure; slightly hard, firm; 2 percent distinct worm casts and 3 percent fine carbonate masses and 5 percent fine carbonate concretions and 5 percent medium carbonate concretions; 1 percent by volume 2-?-3 millimeter chert fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.3; gradual smooth boundary. Lab sample # 03N00955
    Bk5—168 to 208 centimeters (66.1 to 81.9 inches);, light yellowish brown (10YR 6/4), moist; silty clay loam; moderate medium subangular blocky structure; slightly hard, firm; 1.0 very fine roots and 1.0 medium roots and 1.0 fine roots; 3.0 very fine tubular pores; 1 percent distinct worm casts and 5 percent fine carbonate masses and 12 percent fine carbonate concretions and 12 percent medium carbonate concretions; 1 percent by volume 2-?-3 millimeter chert fragments and 2 percent by volume 2-7-25 millimeter quartz fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.3; clear wavy boundary. Lab sample # 03N00956
    Bk6—208 to 229 centimeters (81.9 to 90.2 inches);, light yellowish brown (10YR 6/4), moist; silty clay loam; moderate medium subangular blocky structure; moderately hard, firm; 3.0 very fine roots and 2.0 fine roots; 5 percent fine carbonate masses and 10 percent fine threadlike carbonate concretions and 10 percent medium threadlike carbonate concretions; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.3. Lab sample # 03N00957