IDENTIFIERS

  • Current Taxon Name (Soil Name): Obrien
  • OSD
  • Series Extent
  • User Site ID: S1992MT041002
  • User Pedon ID: 92MT041002
  • Vegetation Plot ID: S1992MT041002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 92P0726
  • NCSS Pedon Lab Data NASIS Record ID - 64965
  • Print Date: 11/26/2024

    • 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: 48.3608322
  • Std. Longitude: -109.6816635
  • Datum: WGS84
  • Township: 30N
  • Range: 16E
  • Section: 17
  • PLSS Details: 1800 feet S and 2300 feet E of NW corner
  • State: Montana
  • County: MT041—Hill
  • MLRA: 46—Northern and Central Rocky Mountain Foothills
  • Non-MLRA Soil Survey Area: MT041—Hill County, Montana

    • PEDON

  • Current Taxonomic Class: Fine-loamy, mixed, superactive, frigid Pachic Haploborolls
  • Current Taxon Kind: series
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - Obrien
  • PSC - 25 to 100 cm.
  • Classificaton Date - 1/27/2010
  • Moisture Class - ustic
  • Sampled As Information:
  • Soil Name - Obrien
  • Taxonomic Class - Fine-loamy, mixed Pachic Haploboroll
  • Taxon Kind - series
  • Classificaton Date - 5/26/1992
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: hills
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Shape Down: convex
  • Drainage Class: well
  • Surface Fragments: 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/26/1992 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: wind and water erosion
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    ACHIL

    AMELA

    ARNIC

    DELPH

    FRAGA

    GERAN

    LUPIN

    PRVI

    SPIRA

    THALI2

    VICIA

    Achillea

    Amelanchier

    Arnica

    Delphinium

    Fragaria

    Geranium

    Lupinus

    Prunus virginiana

    Spiraea

    Thalictrum

    Vicia

    yarrow

    serviceberry

    arnica

    larkspur

    strawberry

    geranium

    lupine

    chokecherry

    spirea

    meadow-rue

    vetch

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

    mollic epipedon

    0—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

    30

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    1085

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    45

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    A1—0 to 20 centimeters (0.0 to 7.9 inches); very dark brown (10YR 2/2), dark brown (10YR 3/3), dry; clay loam; moderate very fine granular structure; slightly hard, friable, moderately sticky, moderately plastic; 3.0 very fine roots and 0.5 fine and medium roots; 21.0 very fine pores; 2 percent by volume 2-39-75 millimeter unspecified fragments; neutral, pH 7.2, hellige-truog; clear smooth boundary. Lab sample # 92P04414
    A2—20 to 74 centimeters (7.9 to 29.1 inches); very dark grayish brown (10YR 3/2), dark grayish brown (10YR 4/2), dry; clay loam; weak coarse prismatic parts to moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 21.0 very fine roots and 0.5 fine and medium roots; 21.0 very fine pores; 2 percent by volume 2-39-75 millimeter unspecified fragments; neutral, pH 7.2, hellige-truog; clear wavy boundary. Lab sample # 92P04415
    Bk1—74 to 109 centimeters (29.1 to 42.9 inches); dark grayish brown (10YR 4/2), brown (10YR 5/3), dry; clay loam; moderate fine and medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 21.0 very fine roots; 21.0 very fine pores; 2 percent fine cylindrical carbonate masses; 5 percent by volume 2-39-75 millimeter unspecified fragments; strong effervescence; moderately alkaline, pH 8.4, hellige-truog; gradual wavy boundary. Lab sample # 92P04416
    Bk2—109 to 152 centimeters (42.9 to 59.8 inches); brown (10YR 4/3), brown (10YR 5/3), dry; clay loam; moderate fine and medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; 3.0 very fine roots; 3.0 very fine pores; 3 percent fine cylindrical carbonate masses; 5 percent by volume 2-39-75 millimeter unspecified fragments; strong effervescence; moderately alkaline, pH 8.4, hellige-truog. Lab sample # 92P04417