IDENTIFIERS

  • Current Taxon Name (Soil Name): Ethridge
  • OSD
  • Series Extent
  • User Site ID: S2016MT033002
  • User Pedon ID: S2016MT033002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 17N0438
  • User Project ID: 2016 - 05MIL - 001
  • Project Name: DSP - MT033 Ethridge
  • Print Date: 12/10/2025

    • 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: 47.4344810
  • Std. Longitude: 107.2748350
  • Datum: WGS84
  • Map Unit: 47B—Ethridge silty clay loam, warm, 0 to 2 percent slopes47B—Ethridge silty clay loam, 0 to 4 percent slopes
  • State: Montana
  • County: MT033—Garfield
  • MLRA: 58A—Northern Rolling High Plains, Northern Part
  • MLRA Soil Survey Area: NW-MIL—Miles City, Montana
  • Non-MLRA Soil Survey Area: MT033—Garfield County, Montana
  • 7.5 Minute USGS Quad: 47107-D3—Brusett, Montana

    • PEDON

  • Describers Name: Brian Kloster
  • Current Taxonomic Class: Fine, smectitic, frigid Torrertic Argiustolls
  • Current Taxon Kind: series
  • Pedon Purpose: research site
  • Pedon Record Orgin: NASIS
  • Sampled As Information:
  • Soil Name - Ethridge
  • Taxonomic Class - Fine, smectitic, frigid Torrertic Argiustolls
  • Taxon Kind - series
  • Classificaton Date - 10/11/2016
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • RaCA Information:
  • Distance From Plot Center - 1
  • Hydric: no


    • SITE

  • Parent Material: clayey alluvium derived from shale and/or residuum weathered from sandstone
  • Landscape: sedimentary plains
  • Landform: alluvial fan
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: yes
  • RaCA Information:
  • DSP Plot ID - C1-G3
  • Plot Configuration - 1

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/29/2016 (actual site observation date)
  • Data Collector: Brian Kloster
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • 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

    2

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    879

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    Ap1—0 to 8 centimeters (0.0 to 3.1 inches); grayish brown (2.5Y 5/2), very dark grayish brown (2.5Y 3/2), moist; silty clay loam; weak fine granular structure; common (4.0) very fine roots throughout; 0.0 pores; fragments; strong effervescence; moderately alkaline, pH 8.2; clear wavy boundary. Lab sample # 17N02266. horizon moist, no pores observed, likely swollen shut due to high shrink swell clay.
    Ap2—8 to 18 centimeters (3.1 to 7.1 inches); grayish brown (2.5Y 5/2), very dark grayish brown (2.5Y 3/2), moist; silty clay; strong coarse prismatic structure; common (2.0) very fine roots throughout; 0.0 pores; fragments; strong effervescence; moderately alkaline, pH 8.0; clear wavy boundary. Lab sample # 17N02267. horizon moist, no pores observed, likely swollen shut due to high shrink swell clay.
    Bt—18 to 52 centimeters (7.1 to 20.5 inches); grayish brown (2.5Y 5/2), dark grayish brown (2.5Y 4/2), moist; silty clay; strong very coarse prismatic structure; moderately few very fine roots throughout; common very fine dendritic tubular pores; clay films; fragments; slight effervescence; strongly alkaline, pH 8.6; gradual wavy boundary. Lab sample # 17N02268. horizon moist, no pores observed, likely swollen shut due to high shrink swell clay.
    Btk—52 to 68 centimeters (20.5 to 26.8 inches); light olive brown (2.5Y 5/3), olive brown (2.5Y 4/3), moist; silty clay; moderately few very fine roots throughout; few very fine dendritic tubular pores; fragments; strong effervescence; strongly alkaline, pH 8.8; abrupt wavy boundary. Lab sample # 17N02269. horizon moist, no pores observed, likely swollen shut due to high shrink swell clay.
    Bk—68 to 87 centimeters (26.8 to 34.3 inches); light olive brown (2.5Y 5/3), olive brown (2.5Y 4/3), moist; silty clay loam; moderately few very fine roots throughout; few very fine dendritic tubular pores; 18 percent carbonate masses; fragments; strong effervescence; moderately alkaline, pH 8.4. Lab sample # 17N02270. horizon moist, no pores observed, likely swollen shut due to high shrink swell clay.
    BC—87 to 122 centimeters (34.3 to 48.0 inches); light olive brown (2.5Y 5/3), olive brown (2.5Y 4/3), moist; clay loam; moderately few very fine roots throughout; few very fine dendritic tubular pores; fragments; strong effervescence; moderately alkaline, pH 8.4. Lab sample # 17N02271