IDENTIFIERS

  • Current Taxon Name (Soil Name): Sweetgrass
  • OSD
  • Series Extent
  • User Site ID: S1989MT097001
  • User Pedon ID: 89MT097001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 89P0611
  • NCSS Pedon Lab Data NASIS Record ID - 61711
  • Print Date: 2/17/2025

    • 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: 45.8108330
  • Std. Longitude: -109.9716644
  • Datum: WGS84
  • Township: 1N
  • Range: 14E
  • Section: 27
  • PLSS Details: 2400 feet E and 1450 feet S of the NW corner
  • State: Montana
  • County: MT097—Sweet Grass
  • MLRA: 46—Northern and Central Rocky Mountain Foothills

    • PEDON

  • Describers Name: Bob Logar and Dan Shurtliff
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Sweetgrass
  • Taxonomic Class - Clayey over sandy or sandy-skeletal, montmorillonitic Typic Argiborolls
  • Classificaton Date - 5/1/1989
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: terrace—outwash or marine
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/1/1989 (actual site observation date)
  • 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 Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    argillic horizon

    calcic horizon

    0—18

    18—33

    33—109

    —-

    —-

    —-
    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

    —

    —

    1359

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 18 centimeters (0.0 to 7.1 inches); very dark grayish brown (10YR 3/2), dark grayish brown (10YR 4/2), dry; gravelly loam; weak fine granular structure; very friable, slightly sticky, slightly plastic; 5.5 very fine and fine roots and 2.5 fine and medium roots; 2 percent by volume 75-162-250 millimeter unspecified fragments; slight effervescence; slightly alkaline, pH 7.4, hellige-truog; abrupt smooth boundary. Lab sample # 89P03395. common fine and medium roots; many very fine and fine roots
    Bt—18 to 33 centimeters (7.1 to 13.0 inches); brown (10YR 4/3), brown (10YR 5/3), dry; clay; moderate medium subangular blocky, and weak fine subangular blocky structure; friable, moderately sticky, moderately plastic; 5.5 very fine roots and 0.5 fine and medium roots; fragments; slight effervescence; slightly alkaline, pH 7.6, hellige-truog; abrupt smooth boundary. Lab sample # 89P03396. few fine and medium roots; many very fine roots
    Bk1—33 to 48 centimeters (13.0 to 18.9 inches); pale brown (10YR 6/3), light gray (10YR 7/2), dry; loam; weak coarse prismatic structure; very friable, slightly sticky, slightly plastic; 0.5 fine roots; fragments; violent effervescence; moderately alkaline, pH 8.4, hellige-truog; clear smooth boundary. Lab sample # 89P03397. few fine roots
    Bk2—48 to 71 centimeters (18.9 to 28.0 inches); light gray (10YR 7/2), very pale brown (10YR 8/2), dry; sandy loam; weak coarse prismatic structure; very friable, nonsticky, nonplastic; 2.5 fine and medium roots; 5 percent by volume 75-162-250 millimeter unspecified fragments; violent effervescence; moderately alkaline, pH 8.4, hellige-truog; clear smooth boundary. Lab sample # 89P03398. common fine and medium roots
    2Bk3—71 to 109 centimeters (28.0 to 42.9 inches); yellowish brown (10YR 5/4), light gray (10YR 7/2), dry; very gravelly coarse sand; single grain; loose, loose, nonsticky, nonplastic; 10 percent by volume 75-162-250 millimeter unspecified fragments; violent effervescence; moderately alkaline, pH 8.4, hellige-truog; gradual smooth boundary. Lab sample # 89P03399
    2C—109 to 152 centimeters (42.9 to 59.8 inches); yellowish brown (10YR 5/4), pale brown (10YR 6/3), dry; extremely gravelly coarse sand; single grain; loose, loose, nonsticky, nonplastic; 10 percent by volume 250-425-600 millimeter unspecified fragments and 20 percent by volume 75-162-250 millimeter unspecified fragments; strong effervescence; moderately alkaline, pH 8.4, hellige-truog. Lab sample # 89P03400