IDENTIFIERS

  • Current Taxon Name (Soil Name): VALLECITOS
  • OSD
  • Series Extent
  • User Site ID: S1959CA001008
  • User Pedon ID: S1959CA001008
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3025
  • NCSS Pedon Lab Data NASIS Record ID - 38154
  • Print Date: 4/28/2025

    • 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: 37.5127792
  • Std. Longitude: -121.5452805
  • Datum: WGS84
  • Township: 5S
  • Range: 4E
  • Section: 9
  • PLSS Details: SW1/4 of the SW1/4 of the NW 1/4, about .05 mile north and .1 mile east of the W1/4 corner
  • Location Description: SE corner of the county.
  • State: California
  • County: CA001—Alameda
  • MLRA: 15—Central California Coast Range
  • Non-MLRA Soil Survey Area: CA609—Alameda Area, California

    • PEDON

  • Describers Name: L. E. Welch
  • Current Taxonomic Class: Fine, smectitic, thermic Lithic Ruptic-Xerochreptic Haploxeralfs
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 8
  • Correlated Information:
  • Soil Name - VALLECITOS
  • PSC - 25 to 41 cm.
  • Classificaton Date - 7/16/2007
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Vallecitos
  • Classificaton Date - 6/1/1959
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: upland
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/1/1959 (actual site observation date)
  • Surface Cover Properties:
  • 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

    25

    —

    —

    756

    —

    135

    635

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    —

    —

    —

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    —

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    A11—0 to 4 centimeters (0.0 to 1.6 inches); brown (10YR 5/3), dark brown (10YR 3/3), moist; loam; weak fine granular structure; soft, friable; 21.0 very fine roots; 21.0 very fine pores; fragments; moderately acid, pH 6.0, unspecified; clear smooth boundary. Lab sample # 40A23728
    A12—4 to 15 centimeters (1.6 to 5.9 inches); brown (10YR 5/3), dark brown (10YR 3/3), moist; clay loam; massive; hard when dry, friable, slightly sticky, moderately plastic; 21.0 very fine roots; 21.0 very fine pores; fragments; slightly acid, pH 6.5, unspecified; abrupt wavy boundary. Lab sample # 40A23729
    B2—15 to 30 centimeters (5.9 to 11.8 inches); reddish brown (5YR 4/3), dark reddish brown (5YR 3/3), moist; clay; massive; very hard, firm, slightly sticky, very plastic; 21.0 very fine roots; 21.0 very fine pores; clay films on faces of peds and in pores and clay bridges; fragments; neutral, pH 7.0, unspecified; clear smooth boundary. Lab sample # 40A23730. continuous - phpvsfiid 184036; continuous - phpvsfiid 184036
    B3—30 to 41 centimeters (11.8 to 16.1 inches); brown (10YR 5/3), brown (10YR 4/3), moist; clay; massive; very hard, firm, slightly sticky, very plastic; 1.0 very fine roots; 3.0 very fine pores; clay films on faces of peds and in pores and clay bridges; fragments; neutral, pH 7.0, unspecified; abrupt irregular boundary. Lab sample # 40A23731. colloid mainly in bridges.; continuous - phpvsfiid 184038; continuous - phpvsfiid 184038
    R—41 to 100 centimeters (16.1 to 39.4 inches); bluish gray (5B 5/1); clay films; fragments. Lab sample # 40A23732. metamorphosed fine-grained sand-stone with calcite seams; clay films along cleavage planes.