IDENTIFIERS

  • Current Taxon Name (Soil Name): RED HILL
  • OSD
  • Series Extent
  • User Site ID: S1972CA055004
  • User Pedon ID: S1972CA055004
  • Vegetation Plot ID: S1972CA055004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 72C0146
  • NCSS Pedon Lab Data NASIS Record ID - 44080
  • Print Date: 11/24/2024

    • 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: 38.5702782
  • Std. Longitude: -122.4313889
  • Datum: WGS84
  • Township: 8N
  • Range: 5W
  • Section: 5
  • PLSS Details: SE 1/4, SE 1/4
  • Location Description: A pit located south of air strip on Pacific Union College. 144 feet SE from water tank near KANG radio tower and 30 feet south of paved road.
  • State: California
  • County: CA055—Napa
  • MLRA: 15—Central California Coast Range
  • Non-MLRA Soil Survey Area: CA055—Napa County, California

    • PEDON

  • Describers Name: G. Lambert, T. D. Cook
  • Current Taxonomic Class: Fine-loamy, mixed, mesic Ultic Argixerolls
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 4
  • Correlated Information:
  • Soil Name - RED HILL
  • PSC - 20 to 70 cm.
  • Classificaton Date - 5/11/2005
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Red Hill
  • Classificaton Date - 11/15/1972
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: basic volcanic breccia
  • Landform: gentle upland slope
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/15/1972 (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

    ARCTO3

    BAPI

    PERSE

    PSMEG

    QUBE5

    Arctostaphylos

    Baccharis pilularis

    Persea

    Pseudotsuga menziesii var. glauca

    Quercus berberidifolia

    manzanita

    coyotebrush

    bay

    Rocky Mountain Douglas-fir

    scrub oak

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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

    4

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    536

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    45

    1016

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    15

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    A11—0 to 5 centimeters (0.0 to 2.0 inches); reddish brown (5YR 4/4), dark reddish brown (5YR 3/3), moist; loam; moderate medium single grain, and moderate fine single grain; soft, friable, slightly sticky, slightly plastic; 21.0 very fine roots and 3.0 medium roots and 21.0 fine roots; 0.5 fine interstitial pores; fragments; moderately acid, pH 6.0; clear smooth boundary. Lab sample # 72C00890; observed in pit, small
    A12—5 to 20 centimeters (2.0 to 7.9 inches); reddish brown (5YR 4/4), dark reddish brown (5YR 3/3), moist; loam; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; 21.0 medium roots and 21.0 fine roots and 0.5 coarse roots; 3.0 medium tubular and 0.5 fine tubular pores; fragments; slightly acid, pH 6.2; abrupt wavy boundary. Lab sample # 72C00891; observed in pit, small
    Bt21—20 to 36 centimeters (7.9 to 14.2 inches); reddish brown (5YR 5/4), dark reddish brown (5YR 3/3), moist; clay loam; weak coarse angular blocky structure; very hard, friable, moderately sticky, moderately plastic; 0.5 medium roots and 0.5 fine roots and 3.0 coarse roots; 21.0 very fine interstitial and 21.0 very fine tubular and 21.0 fine interstitial and 21.0 fine tubular pores; 10 percent clay films on all faces of peds and 10 percent clay films on surfaces along pores; fragments; moderately acid, pH 6.0; clear wavy boundary. Lab sample # 72C00892; observed in pit, small
    Bt22—36 to 51 centimeters (14.2 to 20.1 inches); yellowish red (5YR 5/6), yellowish red (5YR 4/6), moist; clay; weak coarse angular blocky structure; very hard, firm, very sticky, moderately plastic; 3.0 coarse roots; 21.0 very fine tubular and 21.0 very fine interstitial and 21.0 fine tubular and 21.0 fine interstitial pores; 10 percent clay films on all faces of peds and 10 percent clay films on surfaces along pores; fragments; moderately acid, pH 6.0; gradual wavy boundary. Lab sample # 72C00893; observed in pit, small
    Bt23—51 to 69 centimeters (20.1 to 27.2 inches); yellowish red (5YR 5/6), yellowish red (5YR 4/6), moist; clay; massive; very hard, firm, very sticky, moderately plastic; 0.5 medium roots and 0.5 fine roots; 3.0 very fine interstitial and 3.0 very fine tubular and 3.0 fine interstitial and 3.0 fine tubular pores; fragments; moderately acid, pH 6.0; diffuse wavy boundary. Lab sample # 72C00894; observed in pit, small
    Bt31—69 to 89 centimeters (27.2 to 35.0 inches); yellowish red (5YR 5/8), 5YR 4/8 (5YR 4/8), moist; clay loam; massive; very hard, firm, very sticky, moderately plastic; 0.5 medium roots and 0.5 fine roots; 3.0 very fine tubular and 3.0 very fine interstitial and 3.0 fine tubular and 3.0 fine interstitial pores; 30 percent clay films on all faces of peds and 30 percent clay films on surfaces along pores; fragments; moderately acid, pH 6.0; diffuse wavy boundary. Lab sample # 72C00895; observed in pit, small
    Bt32—89 to 112 centimeters (35.0 to 44.1 inches); yellowish red (5YR 5/8), 5YR 4/8 (5YR 4/8), moist; clay; massive; hard, firm, very sticky, moderately plastic; 0.5 medium roots and 0.5 fine roots; 3.0 very fine interstitial and 3.0 very fine tubular and 3.0 fine interstitial and 3.0 fine tubular pores; 30 percent clay films on all faces of peds and 30 percent clay films on surfaces along pores; fragments; moderately acid, pH 6.0; abrupt irregular boundary. Lab sample # 72C00896; observed in pit, small
    R—112 to 150 centimeters (44.1 to 59.1 inches); bedrock; fragments. Lab sample # 72C00897; observed in pit, small