IDENTIFIERS

  • Current Taxon Name (Soil Name): Ahtanum
  • OSD
  • Series Extent
  • User Site ID: S1958WA071001
  • User Pedon ID: S1958WA071001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 40A1022
  • NCSS Pedon Lab Data NASIS Record ID - 34081
  • Print Date: 4/29/2025

    • 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: 46.0238876
  • Std. Longitude: -118.3661118
  • Datum: WGS84
  • Township: 6N
  • Range: 36E
  • Section: 6
  • PLSS Details: SW 1/4, SW 1/4
  • Location Description: junction of old Milton Highway and natural gas pipe line; 75 feet south of highway and 25 feet west of pipe line.
  • State: Washington
  • County: WA071—Walla Walla
  • Non-MLRA Soil Survey Area: WA071—Walla Walla County, Washington

    • PEDON

  • Describers Name: A. O. Ness
  • Current Taxonomic Class: Fine-silty, mixed, superactive, calcareous, mesic Typic Duraquolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Ahtanum
  • Taxonomic Class - Fine-silty, mixed, superactive, calcareous, mesic Typic Duraquolls
  • Taxon Kind - taxadjunct
  • PSC - 25 to 89 cm.
  • Classificaton Date - 10/3/1958
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Drainage Class: moderately well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/3/1958 (actual site observation date)
  • 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
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    —

    —

    —-
    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

    —

    —

    —

    244

    —

    330

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 23 centimeters (0.0 to 9.1 inches); very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; silt loam; weak fine granular structure; slightly hard, friable, nonsticky, nonplastic; 21.0 roots; fragments; strong effervescence; moderately alkaline, pH 8.2, unspecified; abrupt wavy boundary. Lab sample # 40A07633
    Bk1—23 to 43 centimeters (9.1 to 16.9 inches); dark grayish brown (10YR 4/2), light brownish gray (10YR 6/2), dry; silt; massive; soft, very friable, nonsticky, nonplastic; 0.5 roots; 3.0 fine pores; fragments; strong effervescence; moderately alkaline, pH 8.1, unspecified; clear wavy boundary. Lab sample # 40A07634
    B2—43 to 69 centimeters (16.9 to 27.2 inches); grayish brown (10YR 5/2), light gray (10YR 7/2), dry; silt; massive; soft, very friable, nonsticky, nonplastic; 0.5 roots; 3.0 fine and medium pores; fragments; noneffervescent; moderately alkaline, pH 8.0, unspecified; clear wavy boundary. Lab sample # 40A07635
    B3—69 to 81 centimeters (27.2 to 31.9 inches); light brownish gray (10YR 6/2), light gray (10YR 7/2), dry; silt loam; massive; soft, very friable, nonsticky, nonplastic; 0.5 roots; 21.0 fine pores; fragments; slight effervescence; strongly alkaline, pH 8.6, unspecified; abrupt wavy boundary. Lab sample # 40A07636
    B4—81 to 89 centimeters (31.9 to 35.0 inches); dark grayish brown (10YR 4/2), light brownish gray (10YR 6/2), dry; silt loam; massive; hard when dry, firm, nonsticky, nonplastic; 0.5 roots; 21.0 fine and medium pores; fragments; strong effervescence; strongly alkaline, pH 8.8, unspecified; abrupt smooth boundary. Lab sample # 40A07637. common very hard nodules similar to pan in horizon below
    Bkqm—89 to 102 centimeters (35.0 to 40.2 inches); very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; silt loam; massive; strongly coherent; 21.0 medium and 0.5 coarse pores; fragments; violent effervescence; strongly alkaline, pH 9.0, unspecified; clear wavy boundary. Lab sample # 40A07638
    Bkq—102 to 114 centimeters (40.2 to 44.9 inches); very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; silt loam; massive; very hard, very firm, moderately sticky, moderately plastic; 3.0 fine and medium pores; fragments; strong effervescence; strongly alkaline, pH 8.8, unspecified; abrupt wavy boundary. Lab sample # 40A07639
    2C2—114 to 145 centimeters (44.9 to 57.1 inches); brown (10YR 4/3), brown (10YR 5/3), dry; silt loam; massive; slightly hard, friable, moderately sticky, moderately plastic; 21.0 fine and medium pores; fragments; noneffervescent; moderately alkaline, pH 8.4, unspecified. Lab sample # 40A07640. few streaks of light brownish gray (10YR 6/2) volcanic ash 5 to 10 mm wide
    2C1—145 to 173 centimeters (57.1 to 68.1 inches); brown (10YR 4/3), brown (10YR 5/3), dry; silt loam; massive; slightly hard, friable, moderately sticky, moderately plastic; 21.0 fine and medium pores; fragments; noneffervescent. Lab sample # 40A07641. similar to above, split for sampling; few streaks of light brownish gray (10YR 6/2) volcanic ash 5 to 10 mm wide