IDENTIFIERS

  • Current Taxon Name (Soil Name): Watsonville
  • OSD
  • Series Extent
  • User Site ID: S1955CA081011
  • User Pedon ID: S1955CA081011
  • Vegetation Plot ID: S1955CA081011
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3011
  • NCSS Pedon Lab Data NASIS Record ID - 38140
  • Print Date: 2/16/2025

    • 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: 37.4388885
  • Std. Longitude: -122.4424973
  • Datum: WGS84
  • Location Description: In the San Mateo County SCD. 1.1 miles south and 0.8 miles west of Half Moon Bay on bluff overlooking the Pacific Ocean.
  • State: California
  • County: CA081—San Mateo
  • MLRA: 4—California Coastal Redwood Belt
  • Non-MLRA Soil Survey Area: CA637—San Mateo Area, California

    • PEDON

  • Describers Name: Ralph E. Nelson
  • Current Taxonomic Class: Fine, smectitic, mesic Abruptic Argiaquolls
  • Current Taxon Kind: series
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 11
  • Correlated Information:
  • Soil Name - Watsonville
  • PSC - 25 to 100 cm.
  • Classificaton Date - 7/23/2007
  • Moisture Class - aquic
  • Sampled As Information:
  • Soil Name - Watsonville
  • Classificaton Date - 5/19/1955
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: terrace
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/19/1955 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    AVFA

    DACA3

    LUPIN

    Avena fatua

    Danthonia californica

    Lupinus

    wild oat

    California oatgrass

    lupine

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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

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    21

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    559

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    A11—0 to 23 centimeters (0.0 to 9.1 inches); very dark brown (10YR 2/2), gray (10YR 5/1), dry; loam; weak fine and medium subangular blocky structure; very hard, friable, nonsticky, very plastic; 21.0 fine roots; 1 percent fine iron-manganese concretions; 1 percent worm casts; fragments; moderately acid, pH 6.0, unspecified; clear smooth boundary. Lab sample # 40A23626. There are a few fine manganese and iron concretions. Gravel-size siliceous rock fragments scattered throughout this horizon and throughout the entire profile.
    A12—23 to 36 centimeters (9.1 to 14.2 inches); yellowish brown (10YR 5/6) and yellowish brown (10YR 5/8), gray (10YR 5/1) and very dark brown (10YR 2/2), dry; loam; weak fine and medium subangular blocky structure; very hard, friable, nonsticky, very plastic; 21.0 roots; fragments; moderately acid, pH 6.0, unspecified; abrupt smooth boundary. Lab sample # 40A23627. There are many fine shot scattered throughout and a whitish siliceous coating just above the horizon below.
    B21—36 to 61 centimeters (14.2 to 24.0 inches); very dark grayish brown (10YR 3/2) and dark brown (10YR 3/3), dark grayish brown (10YR 4/2) and yellowish brown (10YR 5/4), dry; clay; strong medium and coarse angular blocky structure; extremely hard, very firm, moderately sticky, very plastic; 0.1 roots; very dark grayish brown (10YR 3/2), dry, clay films and very dark grayish brown (2.5Y 3/2), moist,; fine very dark brown (10YR 2/2) iron-manganese concretions; fragments; strongly acid, pH 5.5, unspecified; clear smooth boundary. Lab sample # 40A23628. Very few roots down the cracks between the structural aggregates.; continuous - phpvsfiid 186740; continuous - phpvsfiid 186740
    B22—61 to 84 centimeters (24.0 to 33.1 inches); dark grayish brown (2.5Y 4/2) and very dark grayish brown (2.5Y 3/2) and light olive brown (2.5Y 5/6), grayish brown (2.5Y 5/2) and dark grayish brown (2.5Y 4/2) and olive yellow (2.5Y 6/6), dry; clay; moderate fine and medium angular blocky structure; extremely hard, very firm, moderately sticky, very plastic; 0.1 roots; very dark grayish brown (2.5Y 3/2), dry, clay films on vertical faces of peds; 21 percent fine yellowish brown (10YR 5/6) iron-manganese concretions and 21 percent fine yellowish brown (10YR 5/8) iron concretions; fragments; strongly acid, pH 5.5, unspecified; clear smooth boundary. Lab sample # 40A23629
    B3—84 to 112 centimeters (33.1 to 44.1 inches); grayish brown (2.5Y 5/2) and light olive brown (2.5Y 5/6), light brownish gray (2.5Y 6/2) and olive yellow (2.5Y 6/6), dry; clay; weak fine subangular blocky structure; extremely hard, very firm, moderately sticky, very plastic; 30 percent clay films on vertical faces of peds; 21 percent fine yellowish brown (10YR 5/6) iron-manganese concretions and 21 percent fine yellowish brown (10YR 5/8) iron concretions; fragments; very strongly acid, pH 5.0, unspecified; clear smooth boundary. Lab sample # 40A23630
    C1—112 to 137 centimeters (44.1 to 53.9 inches); yellowish brown (10YR 5/6) and yellowish brown (10YR 5/8) and strong brown (7.5YR 5/8), brownish yellow (10YR 6/6) and brownish yellow (10YR 6/8) and very pale brown (10YR 8/2), dry; sandy clay; brownish yellow (10YR 6/6) distinct and brownish yellow (10YR 6/8) and very pale brown (10YR 8/2) mottles; massive; very hard, firm, moderately sticky, moderately plastic; fragments; very strongly acid, pH 5.0, unspecified; clear smooth boundary. Lab sample # 40A23631
    C2—137 to 152 centimeters (53.9 to 59.8 inches); strong brown (7.5YR 5/8), grayish brown (2.5Y 5/2) and light olive brown (2.5Y 5/4), dry; clay; light brownish gray (2.5Y 6/2) prominent and light yellowish brown (2.5Y 6/4) and brownish yellow (10YR 6/6) and brownish yellow (10YR 6/8) mottles; massive; extremely hard, very firm, very sticky, very plastic; fragments; very strongly acid, pH 5.0, unspecified. Lab sample # 40A23632