IDENTIFIERS

  • Current Taxon Name (Soil Name): Sehorn
  • OSD
  • Series Extent
  • User Site ID: S1993CA011002
  • User Pedon ID: 93CA011002
  • Vegetation Plot ID: S1993CA011002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 94P0050
  • Print Date: 11/13/2024

    • 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: 39.3455544
  • Std. Longitude: -122.3230591
  • Datum: WGS84
  • State: California
  • County: CA011—Colusa
  • MLRA: 17—Sacramento and San Joaquin Valleys
  • Non-MLRA Soil Survey Area: CA011—Colusa County, California
  • 7.5 Minute USGS Quad: 39122-C3—Sites, California

    • PEDON

  • Describers Name: Dean Burkett, Maxine Levin
  • Current Taxonomic Class: Fine, smectitic, thermic Chromic Haploxererts
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: research site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Sehorn
  • PSC - 25 to 89 cm.
  • Classificaton Date - 10/12/2006
  • Soil Taxonomic Edition - seventh edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Sehorn High
  • Classificaton Date - 9/21/1993
  • Dynamic Soil Properties:
  • Erosion Class - 3
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: silty and clayey residuum weathered from graywacke or mudstone
  • Landscape: hills
  • Landform: hillside
  • Anthropogenic Feature: leveled land
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Bedrock: s moderate weathered mudstone with <10 and a strike of 190 degrees and a dip of 90 to 90 degrees
  • Geology: Great Valley Sequence formation.
  • Surface Fragments: 0.00 percent 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/21/1993 (actual site observation date)
  • Microrelief Elevation: 0
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, grassland
  • 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

    VERBA

    Verbascum

    mullein

    —

    —

    —
    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

    35

    278

    163

    450

    —

    315

    170

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    Colusa SW

    —
    A—0 to 12 centimeters (0.0 to 4.7 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay loam; 38 percent clay; strong coarse prismatic parts to moderate medium subangular blocky parts to moderate very fine platy structure; hard, firm, noncoherent, slightly sticky, slightly plastic; deformable; 3.0 very fine roots throughout; 3.0 very fine low-continuity interstitial pores; 1 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; abrupt smooth boundary. Lab sample # 94P0430; observed in trench. Polygon #1C
    Bw—12 to 22 centimeters (4.7 to 8.7 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 45 percent clay; strong coarse prismatic parts to moderate medium subangular blocky structure; extremely hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; 0.5 very fine roots between peds and in cracks; 3.0 very fine low-continuity interstitial pores; 40 percent prominent , dry, pressure faces on faces of peds; 1 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; gradual wavy boundary. Lab sample # 94P0431; observed in trench. Polygon #2C; patchy - phpvsfiid 207421; patchy - phpvsfiid 207421
    Bss1—22 to 48 centimeters (8.7 to 18.9 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 55 percent clay; strong coarse prismatic parts to moderate medium angular blocky structure; extremely hard, very firm, noncoherent, moderately sticky, very plastic; deformable; 0.5 very fine and fine roots; 3.0 very fine low-continuity interstitial and tubular pores; 10 percent prominent , dry, slickensides (pedogenic) on faces of peds and 50 percent prominent pressure faces on faces of peds; 5 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; clear smooth boundary. Lab sample # 94P0432; observed in trench. Polygon #16; discontinuous - phpvsfiid 207422; patchy - phpvsfiid 207423; discontinuous - phpvsfiid 207422; patchy - phpvsfiid 207423
    Bss2—48 to 67 centimeters (18.9 to 26.4 inches); light yellowish brown (2.5Y 6/3) exterior, light olive brown (2.5Y 5/3) exterior, moist; clay; 50 percent clay; strong coarse prismatic parts to moderate medium angular blocky structure; hard, firm, noncoherent, moderately sticky, very plastic; deformable; 0.5 very fine and fine roots between peds; 3.0 very fine low-continuity interstitial and tubular pores; 10 percent prominent , dry, slickensides (pedogenic) on faces of peds and 50 percent prominent , dry, pressure faces on faces of peds; 10 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; abrupt smooth boundary. Lab sample # 94P0433; observed in trench. Polygon #15; discontinuous - phpvsfiid 207424; patchy - phpvsfiid 207425; discontinuous - phpvsfiid 207424; patchy - phpvsfiid 207425
    BC—67 to 89 centimeters (26.4 to 35.0 inches); light yellowish brown (10YR 6/4) exterior, light olive brown (2.5Y 5/3) exterior, moist; extremely gravelly clay loam; 37 percent clay; moderate fine subangular blocky structure; slightly hard, firm, noncoherent, slightly sticky, slightly plastic; deformable; 0.5 very fine roots around fragments; 3.0 very fine low-continuity interstitial pores; 80 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog; gradual irregular boundary. Lab sample # 94P0434; observed in trench. Polygon #12B
    R—89 to 200 centimeters (35.0 to 78.7 inches); weak very fine subangular blocky structure; 0.5 very fine to medium roots around fragments; 3.0 very fine low-continuity interstitial pores; 95 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog. Lab sample # 94P0435; observed in trench. Polygon #13B