IDENTIFIERS

  • Current Taxon Name (Soil Name): Melado
  • OSD
  • Series Extent
  • User Site ID: S2004-TX377-002-copy
  • User Pedon ID: S2004-TX377-002-copy
  • Vegetation Plot ID: S2004-TX377-002-copy
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - TAMU
  • Lab Pedon # - S04TX377002
  • Print Date: 11/21/2024
  • 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: 29.6719971
  • Std. Longitude: -104.4803543
  • Datum: WGS84
  • Location Description: Presidio County, Texas; from the intersection of US Highway 67 and FM 170 north of Presidio, 9.6 miles northwest on FM 170 to ranch road, 1.3 miles northeast on ranch road, then 600 feet north in rangeland.
  • Map Unit: MPB—Melado-Pantera complex, 1 to 5 percent slopes
  • Country: US—United States
  • State: Texas
  • County: TX377—Presidio
  • MLRA: 42—Southern Desertic Basins, Plains, and Mountains
  • MLRA Soil Survey Area: SW-MAF—Marfa, Texas
  • Non-MLRA Soil Survey Area: TX377—Presidio County, Texas
  • 7.5 Minute USGS Quad: 29104-F4—Arroyo Melado, Texas
  • PEDON

  • Describers Name: Lynn Loomis, Tom Hallmark, Jim Clausen, and Derek Milner
  • Current Taxonomic Class: Fine, smectitic, hyperthermic Typic Haplosalids
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Melado
  • PSC - 25 to 100 cm.
  • Classificaton Date - 6/20/2017
  • Classifier - Lynn Loomis and David Jalali
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Melado-OSD
  • Classificaton Date - 1/5/2004
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1


  • SITE

  • Parent Material: alluvium derived from mixed
  • Landscape: semi-bolson
  • Landform: alluvial flat
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Surface Fragments:
  • Benchmark Soil?: no
  • VEGETATION

    SITE OBSERVATION

  • Observation Date: 1/5/2004 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - barren land
  • Site Obs. Cover Kind 2 - other barren
  • Pedoderm Loose Cover Indicator - no
  • 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 % % % % % % % % % % % % %

    A

    Bw

    Bz1

    Bz2

    Bz3

    BCz

    Cyz

    Cyz

    0

    9

    25

    56

    89

    112

    155

    155

    9

    25

    56

    89

    112

    155

    220

    220

    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

    A

    Bw

    Bz1

    Bz2

    Bz3

    BCz

    Cyz

    Cyz

    0

    9

    25

    56

    89

    112

    155

    155

    9

    25

    56

    89

    112

    155

    220

    220

    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 %

    A

    Bw

    Bz1

    Bz2

    Bz3

    BCz

    Cyz

    Cyz

    0

    9

    25

    56

    89

    112

    155

    155

    9

    25

    56

    89

    112

    155

    220

    220

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    90

    52

    37

    36

    37

    40

    57

    47

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

    ATAC

    ATOB

    Atriplex acanthocarpa

    Atriplex obovata

    tubercled saltbush

    mound saltbush

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

    ochric epipedon

    salic horizon

    cambic horizon

    0—9

    0—25

    25—155

    —-

    —-

    —-

    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

    817.7

    204

    265

    914

    262

    21.5

    30.3

    12.1

    TX7262

    Presidio

    PRISM

    A—0 to 9 centimeters (0.0 to 3.5 inches); yellowish brown (10YR 5/4), brown (10YR 5/3), moist; clay; 16 percent sand; 39 percent silt; 45 percent clay; weak medium platy, and weak medium subangular blocky structure; slightly hard, friable, very sticky, very plastic; high excavation difficulty; fragments; 41 percent of Field estimated clay content; 10 percent of Field estimated sand content; 49 percent of Field estimated silt content; sic of Field estimated texture class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.2, pH meter; gradual smooth boundary. Lab sample # TAMU6846; dry when described; observed in trench
    Bw—9 to 25 centimeters (3.5 to 9.8 inches); brown (10YR 5/3), brown (10YR 4/3), moist; clay; 15 percent sand; 38 percent silt; 47 percent clay; weak coarse prismatic parts to weak medium subangular blocky parts to weak fine subangular blocky, and weak medium platy structure; moderately hard, firm, very sticky, very plastic; high excavation difficulty; fragments; 41 percent of Field estimated clay content; 10 percent of Field estimated sand content; 49 percent of Field estimated silt content; sic of Field estimated texture class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter; gradual smooth boundary. Lab sample # TAMU6847; dry when described; observed in trench
    Bz1—25 to 56 centimeters (9.8 to 22.0 inches); brown (10YR 5/3), brown (10YR 4/3), moist; clay; 17 percent sand; 36 percent silt; 47 percent clay; weak coarse prismatic parts to weak coarse subangular blocky parts to weak fine subangular blocky structure; moderately hard, firm, very sticky, very plastic; high excavation difficulty; 5 percent fine threadlike noncoherent cemented white (10YR 8/1), dry, salt masses throughout; fragments; 41 percent of Field estimated clay content; 10 percent of Field estimated sand content; 49 percent of Field estimated silt content; strong effervescence, by hcl, 1n; moderately alkaline, pH 7.9, pH meter; gradual smooth boundary. Lab sample # TAMU6848; dry when described; observed in trench
    Bz2—56 to 89 centimeters (22.0 to 35.0 inches); brown (10YR 5/3), brown (10YR 4/3), moist; clay; 12 percent sand; 38 percent silt; 50 percent clay; weak coarse prismatic parts to weak coarse subangular blocky parts to weak medium subangular blocky structure; moderately hard, firm, very sticky, very plastic; high excavation difficulty; 2 percent fine threadlike noncoherent cemented white (10YR 8/1), dry, salt masses throughout; fragments; 41 percent of Field estimated clay content; 10 percent of Field estimated sand content; 49 percent of Field estimated silt content; sic of Field estimated texture class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter; gradual smooth boundary. Lab sample # TAMU6849; dry when described; observed in trench
    Bz3—89 to 112 centimeters (35.0 to 44.1 inches); brown (10YR 5/3), brown (10YR 4/3), moist; clay loam; 28 percent sand; 33 percent silt; 40 percent clay; weak coarse prismatic parts to weak medium subangular blocky structure; moderately hard, firm, very sticky, very plastic; high excavation difficulty; 3 percent fine threadlike noncoherent cemented white (10YR 8/1), dry, salt crystals throughout; fragments; 41 percent of Field estimated clay content; 10 percent of Field estimated sand content; 49 percent of Field estimated silt content; sic of Field estimated texture class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter; gradual smooth boundary. Lab sample # TAMU6850; dry when described; observed in trench
    BCz—112 to 155 centimeters (44.1 to 61.0 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; stratified stratified sandy clay loam; 50 percent sand; 27 percent silt; 28 percent clay; weak medium subangular blocky structure; moderately hard, firm, moderately sticky, moderately plastic; high excavation difficulty; 2 percent fine threadlike noncoherent cemented white (10YR 8/1), dry, salt masses throughout; fragments; 35 percent of Field estimated clay content; 25 percent of Field estimated sand content; 40 percent of Field estimated silt content; sr- cl of Field estimated texture class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.2, pH meter; clear wavy boundary. Lab sample # TAMU6851; dry when described; observed in trench
    Cyz—155 to 220 centimeters (61.0 to 86.6 inches); brown (10YR 5/3), brown (10YR 4/3), moist; stratified stratified clay; 32 percent sand; 28 percent silt; 40 percent clay; moderate medium subangular blocky structure; moderately hard, firm, very sticky, very plastic; high excavation difficulty; 5 percent fine irregular noncoherent cemented white (10YR 8/1), dry, gypsum masses throughout and 1 percent fine irregular noncoherent cemented white (10YR 8/1), dry, gypsum crystals, unspecified; fragments; 41 percent of Field estimated clay content; 40 percent of Field estimated sand content; 19 percent of Field estimated silt content; sr- c of Field estimated texture class; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter. Lab sample # TAMU6852; dry when described; observed in pit, small. Stratified 50%. Multicolored sand and gravels. Thicker in upper part. Gypsum crystals form in between sand and clay layers
    Cyz—155 to 220 centimeters (61.0 to 86.6 inches); brown (10YR 5/3), brown (10YR 4/3), moist; stratified stratified very gravelly coarse sandy loam; 79 percent sand; 8 percent silt; 13 percent clay; structureless single grain; loose, loose, nonsticky, nonplastic; high excavation difficulty; 50 percent by volume subrounded 2-?-75 millimeter mixed fragments; 3 percent of Field estimated clay content; 95 percent of Field estimated sand content; 2 percent of Field estimated silt content; sr- grv-cos of Field estimated texture class; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter. Lab sample # TAMU6853; dry when described; observed in pit, small. Stratified 50%. Multicolored sand and gravels. Thicker in upper part. Gypsum crystals form in between sand and clay layers