IDENTIFIERS

  • Current Taxon Name (Soil Name): Eguaje
  • OSD
  • Series Extent
  • User Site ID: 88CO628052
  • User Pedon ID: 88CO628052
  • Vegetation Plot ID: 88CO628052
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Pedon # - 89P0152
  • NCSS Pedon Lab Data NASIS Record ID - 61256
  • User Project ID: 2023 - SW-SAN - 70A.3
  • Project Name: MLRA 70A.3 - Update to Volcanic Plateaus LRU
  • 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: 37.1713889
  • Std. Longitude: -103.3177778
  • Datum: WGS84
  • Township: 33 S.
  • Range: 53 W.
  • Section: 14
  • PLSS Details: 1775 feet south and 200 feet west of the northeast corner
  • Map Unit: Ec—Eguaje-Demayo complex, 1 to 12 percent slopes, stony
  • State: Colorado
  • County: CO071—Las Animas
  • MLRA: 70A—High Plateaus of the Southwestern Great Plains
  • Non-MLRA Soil Survey Area: CO628—Las Animas County Area, Colorado, Parts of Huerfano and Las Animas Counties
  • 7.5 Minute USGS Quad: 37103-B3—Kim South, Colorado

    • PEDON

  • Describers Name: LAN
  • Current Taxonomic Class: Clayey-skeletal, smectitic, superactive, mesic Calcidic Argiustolls
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 495
  • Sampled As Information:
  • Soil Name - Eguaje
  • Taxonomic Class - Clayey-skeletal, smectitic, superactive, mesic Calcidic Argiustolls
  • PSC - 5 to 52 cm.
  • Classificaton Date - 6/29/1988
  • Soil Taxonomic Edition - eighth edition
  • Moisture Class - ustic
  • Moisture SUBClass - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium derived from basalt
  • Landscape: lava plateau
  • Landform: mesa
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Runoff: high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: basalt
  • Surface Fragments: 10.00 percent nonflat subangular indurated 2- to 75-millimeter basalt, 5.00 percent nonflat subangular indurated 75- to 250-millimeter basalt,
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/29/1988 (actual site observation date)
  • Air Photo ID: 1-75
  • Plant Association Name: Cobbly Foothills
  • 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
    • 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

    Bt1

    Bt2

    Btk

    Bk

    0

    5

    20

    38

    52

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    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

    Bt1

    Bt2

    Btk

    Bk

    0

    5

    20

    38

    52

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    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

    Bt1

    Bt2

    Btk

    Bk

    0

    5

    20

    38

    52

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    2

    11

    25

    35

    40

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

    ARLOG

    BOCU

    BOGR2

    BOHI2

    ELEL5

    OPIMI

    Aristida longispica var. geniculata

    Bouteloua curtipendula

    Bouteloua gracilis

    Bouteloua hirsuta

    Elymus elymoides

    Opuntia imbricata var. imbricata

    slimspike threeawn

    sideoats grama

    blue grama

    hairy grama

    squirreltail

    tree cholla

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

    bedrock, lithic

    indurated

    119 -

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

    mollic epipedon

    argillic horizon

    calcic horizon

    0—20

    5—52

    38—74

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    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

    8

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    1799

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    406

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    11.1

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    11.7

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    R—; unweathered bedrock; fragments.
    A—0 to 5 centimeters (0.0 to 2.0 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; gravelly silty clay loam; 29 percent clay; weak fine granular structure; soft, friable, slightly sticky, slightly plastic; 10.0 very fine roots throughout; 2 percent by volume nonflat subrounded indurated 250-425-600 millimeter basalt fragments and 3 percent by volume nonflat subrounded indurated 75-162-250 millimeter basalt fragments and 25 percent by volume nonflat subrounded indurated 2-39-75 millimeter basalt fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.8, hellige-truog; abrupt smooth boundary.; moist when described; observed in pit, small
    Bt1—5 to 20 centimeters (2.0 to 7.9 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; gravelly silty clay loam; 32 percent clay; moderate medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 8.0 very fine roots throughout; 30 percent distinct clay films on faces of peds; 1 percent by volume nonflat subrounded indurated 250-425-600 millimeter basalt fragments and 4 percent by volume nonflat subrounded indurated 75-162-250 millimeter basalt fragments and 20 percent by volume nonflat subrounded indurated 2-39-75 millimeter basalt fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.0, hellige-truog; clear smooth boundary.; moist when described;. patchy - phpvsfiid 274880; patchy - phpvsfiid 274880
    Bt2—20 to 38 centimeters (7.9 to 15.0 inches); brown (10YR 5/3), brown (10YR 4/3), moist; extremely gravelly silty clay; 40 percent clay; moderate medium subangular blocky structure; very hard, firm, moderately sticky, moderately plastic; 2.0 very fine roots throughout; 55 percent distinct clay films on faces of peds; 1 percent by volume nonflat subrounded indurated 250-425-600 millimeter basalt fragments and 4 percent by volume nonflat subrounded indurated 75-162-250 millimeter basalt fragments and 56 percent by volume nonflat subrounded indurated 2-39-75 millimeter basalt fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.2, hellige-truog; gradual smooth boundary.; moist when described;. continuous - phpvsfiid 274881; continuous - phpvsfiid 274881
    Btk—38 to 52 centimeters (15.0 to 20.5 inches); pale brown (10YR 6/3), brown (10YR 5/3), moist; extremely gravelly silty clay; 40 percent clay; moderate medium subangular blocky structure; very hard, firm, moderately sticky, moderately plastic; 5.0 very fine roots throughout; 25 percent faint clay films on faces of peds; 15 percent medium irregular carbonate masses throughout; 1 percent by volume nonflat subrounded indurated 250-425-600 millimeter basalt fragments and 4 percent by volume nonflat subrounded indurated 75-162-250 millimeter basalt fragments and 65 percent by volume nonflat subrounded indurated 2-39-75 millimeter basalt fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.2, hellige-truog; clear smooth boundary.; dry when described;. patchy - phpvsfiid 274882; patchy - phpvsfiid 274882
    Bk—52 to 119 centimeters (20.5 to 46.9 inches); pale brown (10YR 6/3), brown (10YR 5/3), moist; extremely gravelly silty clay loam; 38 percent clay; massive; hard, friable, moderately sticky, moderately plastic; 0.5 very fine roots throughout; 20 percent medium irregular carbonate masses throughout; 1 percent by volume nonflat subrounded indurated 250-425-600 millimeter basalt fragments and 4 percent by volume nonflat subrounded indurated 75-162-250 millimeter basalt fragments and 70 percent by volume nonflat subrounded indurated 2-39-75 millimeter basalt fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.4, hellige-truog; abrupt irregular boundary.; dry when described;