IDENTIFIERS

  • Current Taxon Name (Soil Name): Ritoazul
  • OSD
  • Series Extent
  • User Site ID: 93CO628013
  • User Pedon ID: 93CO628013
  • Vegetation Plot ID: 93CO628013
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Pedon # - 94P0018
  • NCSS Pedon Lab Data NASIS Record ID - 66208
  • Print Date: 2/16/2025

    • 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: 37.0353333
  • Std. Longitude: -103.9891667
  • Datum: WGS84
  • Township: 34 S.
  • Range: 59 W.
  • Section: 35
  • PLSS Details: 1050 feet east and 1900 feet north of the southwest corner
  • Location Description: 1050 feet east and 1900 feet north of the southwest corner of section 35, T.34S., R.59W.
  • Map Unit: RaC—Ritoazul silty clay, 0 to 4 percent slopes
  • State: Colorado
  • County: CO071—Las Animas
  • MLRA: 70—Pecos-Canadian Plains and Valleys
  • Non-MLRA Soil Survey Area: CO628—Las Animas County Area, Colorado, Parts of Huerfano and Las Animas Counties
  • 7.5 Minute USGS Quad: 37103-A8—Branson, Colorado

    • PEDON

  • Describers Name: LAN
  • Current Taxonomic Class: Fine, smectitic, mesic Aridic Haplusterts
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 611
  • Correlated Information:
  • Soil Name - Ritoazul
  • PSC - 25 to 84 cm.
  • Classificaton Date - 6/12/2012
  • Soil Taxonomic Edition - eighth edition
  • Moisture Class - ustic
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Ritoazul
  • Classificaton Date - 5/21/1993
  • Dynamic Soil Properties:
  • Erosion Class - 2
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: alluvium over residuum weathered from calcareous shale
  • Landscape: foothills
  • Landform: alluvial fan
  • Hill Slope Profile: footslope
  • Slope Position: upper third
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: weakly coherent moderate weathered shale, calcareous
  • Geology: Carlile Shale member of the Niobrara formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/21/1993 (actual site observation date)
  • Air Photo ID: 1-97
  • Plant Association Name: Clayey Plains
  • 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
    • 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

    A

    Bss1

    Bss1

    Bss2

    Bss2

    BCk

    BCk

    B/Cr

    B/Cr

    0

    0

    8

    8

    46

    46

    74

    74

    84

    84

    —

    8

    —

    46

    —

    74

    —

    84

    —

    91

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    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

    A

    Bss1

    Bss1

    Bss2

    Bss2

    BCk

    BCk

    B/Cr

    B/Cr

    0

    0

    8

    8

    46

    46

    74

    74

    84

    84

    —

    8

    —

    46

    —

    74

    —

    84

    —

    91

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    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

    A

    Bss1

    Bss1

    Bss2

    Bss2

    BCk

    BCk

    B/Cr

    B/Cr

    0

    0

    8

    8

    46

    46

    74

    74

    84

    84

    —

    8

    —

    46

    —

    74

    —

    84

    —

    91

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    25

    25

    22

    22

    18

    18

    7

    7

    7

    7

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    BOGR2

    GUSA2

    PASM

    UNKNOWN

    YUCCA

    Bouteloua gracilis

    Gutierrezia sarothrae

    Pascopyrum smithii

    unknown scientific name

    Yucca

    blue grama

    broom snakeweed

    western wheatgrass

    unknown national vernacular name

    yucca

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, paralithic

    moderately coherent

    91 - 122

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

    ochric epipedon

    cambic horizon

    paralithic contact

    0—8

    8—74

    91—152

    —-

    —-

    —-
    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

    4

    76

    15.2

    1807

    —

    44

    381

    —

    —

    11.1

    21.1

    1.1

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 8 centimeters (0.0 to 3.1 inches); dark grayish brown (2.5Y 4/2) interior, grayish brown (2.5Y 5/2) exterior, moist; silty clay loam; 38 percent clay; weak fine granular, and weak fine subangular blocky structure; soft, very friable, moderately sticky, moderately plastic; slow permeability; 0.5 very fine roots throughout; 1 percent by volume subangular 2-39-75 millimeter unspecified fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.4, hellige-truog; clear smooth boundary. Lab sample # 011-001; moist when described;
    Bss1—8 to 46 centimeters (3.1 to 18.1 inches); grayish brown (10YR 5/2) exterior, dark grayish brown (10YR 4/2) interior, moist; silty clay; 43 percent clay; moderate fine and medium subangular blocky structure; extremely hard, very firm, very sticky, very plastic; slow permeability; 0.5 fine roots throughout; 5 percent distinct slickensides (pedogenic) throughout; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 011-002; moist when described;. patchy - phpvsfiid 110709; patchy - phpvsfiid 110709
    Bss2—46 to 74 centimeters (18.1 to 29.1 inches); 80 percent light olive brown (2.5Y 5/3) exterior and 20 percent dark grayish brown (2.5Y 4/2) exterior, grayish brown (2.5Y 5/2) crushed, moist; silty clay; 53 percent clay; weak medium subangular blocky structure; extremely hard, very firm, very sticky, very plastic; slow permeability; 0.5 fine roots in cracks; 5 percent distinct slickensides (pedogenic) throughout; 2 percent by volume angular 2-39-75 millimeter shale, calcareous fragments and 5 percent by volume subangular 2-39-75 millimeter unspecified fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.4, hellige-truog; gradual wavy boundary. Lab sample # 011-003; moist when described;. patchy - phpvsfiid 110710; patchy - phpvsfiid 110710
    BCk—74 to 84 centimeters (29.1 to 33.1 inches); 50 percent light olive brown (2.5Y 5/3) exterior and 50 percent dark grayish brown (2.5Y 4/2) exterior, dark grayish brown (2.5Y 4/2) crushed, moist; silty clay; 41 percent clay; massive; extremely hard, very firm, very sticky, very plastic; slow permeability; 0.5 very fine roots throughout; 5 percent fine spherical lime masses throughout; 15 percent by volume angular 2-39-75 millimeter shale, calcareous fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 011-004; moist when described;
    B/Cr—84 to 91 centimeters (33.1 to 35.8 inches); 30 percent light olive brown (2.5Y 5/3) exterior and 30 percent dark grayish brown (2.5Y 4/2) exterior, dark grayish brown (2.5Y 4/2) crushed, moist; silty clay loam, weathered bedrock; 29 percent clay; massive; extremely hard, very firm, very sticky, very plastic; slow permeability; 0.1 very fine roots in cracks; 5 percent fine spherical lime masses throughout; fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.2, hellige-truog; clear wavy boundary. Lab sample # 011-005; moist when described;
    Cr1—84 to 102 centimeters (33.1 to 40.2 inches); 40 percent dark gray (10YR 4/1) exterior weathered bedrock; fragments; clear wavy boundary. Lab sample # 011-006