IDENTIFIERS

  • Current Taxon Name (Soil Name): Waltham
  • OSD
  • Series Extent
  • User Site ID: S1990MT015791
  • User Pedon ID: 90MT015791
  • Vegetation Plot ID: S1990MT015791
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 91P0202
  • NCSS Pedon Lab Data NASIS Record ID - 63249
  • Print Date: 11/11/2024

    • 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: 47.6388893
  • Std. Longitude: -110.5938873
  • Datum: WGS84
  • Township: 22N
  • Range: 9E
  • Section: 28
  • PLSS Details: 500 feet S and 1000 feet E of NW corner
  • Location Description: Chouteau County, MT. About 400 feet NE of old, locked gate on NE side of county road.
  • State: Montana
  • County: MT015—Chouteau

    • PEDON

  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 791
  • Sampled As Information:
  • Soil Name - Waltham
  • Taxonomic Class - Fine, montmorillonitic Typic Natriboralfs
  • PSC - 10 to 30 cm.
  • Classificaton Date - 10/1/1990
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Slope Shape Down: undulating
  • Runoff: low
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/1/1990 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    AGSM

    ARFR

    KOCR

    Agropyron smithii

    Arenaria franklinii

    Koeleria cristata

    —

    Franklin's sandwort

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    ochric epipedon

    natric horizon

    0—18

    5—28

    —-

    —-
    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

    —

    —

    1067

    —

    135

    41

    —

    —

    7

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    E—0 to 5 centimeters (0.0 to 2.0 inches); dark grayish brown (2.5Y 4/2), dark grayish brown (2.5Y 4/2), dry; loam; moderate medium platy structure; hard, very friable, moderately sticky, slightly plastic; 2.5 very fine and fine roots; 0.5 very fine tubular pores; fragments; slight effervescence; neutral, pH 7.0, hellige-truog; abrupt smooth boundary. Lab sample # 91P01249. common very fine and fine roots
    Bt1—5 to 15 centimeters (2.0 to 5.9 inches); very dark grayish brown (2.5Y 3/2), dark grayish brown (2.5Y 4/2), dry; clay; strong medium and coarse prismatic, and strong medium subangular blocky structure; extremely hard, very firm, very sticky, very plastic; 2.5 very fine and fine roots; 0.5 very fine tubular pores; 55 percent distinct clay films on faces of peds; fragments; slight effervescence; slightly alkaline, pH 7.4, hellige-truog; clear smooth boundary. Lab sample # 91P01250. many clay films surface features on faces of peds; common very fine and fine roots
    Bt2—15 to 28 centimeters (5.9 to 11.0 inches); dark grayish brown (2.5Y 4/2), dark grayish brown (2.5Y 4/2), dry; clay; strong medium prismatic, and strong fine and medium subangular blocky structure; extremely hard, very firm, very sticky, very plastic; 2.5 very fine and fine roots; 2.5 very fine tubular pores; 55 percent distinct clay films on faces of peds; fragments; slight effervescence; slightly alkaline, pH 7.6, hellige-truog; clear wavy boundary. Lab sample # 91P01251. many clay films surface features on faces of peds; common very fine and fine roots
    Btk—28 to 46 centimeters (11.0 to 18.1 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; clay loam; moderate medium prismatic, and moderate fine and medium subangular blocky structure; very hard, friable, very sticky, very plastic; 2.5 very fine and fine roots; 2.5 very fine tubular pores; 37 percent faint clay films; 1 percent fine lime masses; fragments; strong effervescence; strongly alkaline, pH 8.6, hellige-truog; clear wavy boundary. Lab sample # 91P01252. few fine soft masses of lime concentrations; common clay films surface features; common very fine and fine roots
    Bky1—46 to 76 centimeters (18.1 to 29.9 inches); dark grayish brown (10YR 4/2), brown (10YR 5/3), dry; clay loam; weak coarse prismatic, and moderate fine and medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 0.5 very fine and fine roots; 2.5 very fine tubular pores; 11 percent fine gypsum masses and 11 percent fine lime masses; fragments; strong effervescence; moderately alkaline, pH 8.4, hellige-truog; gradual wavy boundary. Lab sample # 91P01253. common fine masses of gypsum concentrations; common fine soft masses of lime concentrations; few very fine and fine roots
    Bky2—76 to 112 centimeters (29.9 to 44.1 inches); dark grayish brown (2.5Y 4/2), light yellowish brown (2.5Y 6/4), dry; clay loam; weak fine and medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 2.5 very fine tubular pores; 1 percent fine lime masses and 1 percent fine gypsum masses; fragments; strong effervescence; moderately alkaline, pH 8.4, hellige-truog; gradual wavy boundary. Lab sample # 91P01254. few fine soft masses of lime concentrations; few fine masses of gypsum concentrations
    Byz1—112 to 152 centimeters (44.1 to 59.8 inches); dark grayish brown (2.5Y 4/2), light yellowish brown (2.5Y 6/4), dry; clay loam; weak fine and medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 2.5 very fine tubular pores; fragments; strong effervescence; moderately alkaline, pH 8.2, hellige-truog; gradual wavy boundary. Lab sample # 91P01255. few fine masses of gypsum and soluble salts
    Byz2—152 to 203 centimeters (59.8 to 79.9 inches); dark grayish brown (2.5Y 4/2), light yellowish brown (2.5Y 6/4), dry; clay loam; weak fine and medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 2.5 very fine tubular pores; fragments; moderately alkaline, pH 8.2, hellige-truog. Lab sample # 91P01256