IDENTIFIERS

  • Current Taxon Name (Soil Name): Willows
  • OSD
  • Series Extent
  • User Site ID: 93CA011009
  • User Pedon ID: 93CA011006
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 94P0057
  • Print Date: 2/2/2025

    • 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: 39.2097222
  • Std. Longitude: -122.0647222
  • Datum: WGS84
  • Location Description: 3 miles west of Colusa, CA. 2200' north and 2250 feet west of the southeast corner, Section 27, T.16N., R.2W.
  • Map Unit: 104—Willows silty clay, 0 to 1 percent slopes, frequently flooded
  • 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-B1—Colusa, California

    • PEDON

  • Describers Name: William Reed, Arlene Tugel, and John Rule
  • Current Taxonomic Class: Fine, smectitic, thermic Aquic Haploxererts
  • Current Taxon Kind: series
  • Pedon Type: within range of map unit
  • Pedon Purpose: research site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Willows
  • PSC - 25 to 100 cm.
  • Classificaton Date - 11/9/2005
  • Soil Taxonomic Edition - seventh edition
  • Moisture Class - udic
  • Moisture Subclass - aquic
  • Sampled As Information:
  • Soil Name - Wekoda Low
  • Classificaton Date - 9/24/1993
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: basin
  • Landform: flood plain
  • Anthropogenic Feature: leveled land
  • Flooding: frequent flooding
  • Surface Fragments: 0.00 percent 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/24/1993 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - close-grown crop
  • 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

    1

    —

    —

    47

    —

    180

    170

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    Colusa

    —
    Ap1—0 to 13 centimeters (0.0 to 5.1 inches); dark grayish brown (10YR 4/2), very dark brown (10YR 2/2), moist; silty clay; 42 percent clay; 2 percent dark yellowish brown (10YR 4/6) fine distinct spherical and 2 percent dark yellowish brown (10YR 4/6) fine distinct spherical and 10 percent dark brown (10YR 3/3) fine faint irregular and 10 percent dark yellowish brown (10YR 4/4) fine distinct irregular mottles; strong coarse subangular blocky, and strong medium granular structure; hard, friable, moderately sticky, moderately plastic; deformable; low toughness; 0.5 very fine roots throughout; 5.0 very fine interstitial pores; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; fragments; noneffervescent, by hcl, 1n; abrupt smooth boundary. Lab sample # 94P0491; observed in trench. Polygon #1.
    Ap2—13 to 32 centimeters (5.1 to 12.6 inches); dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2), moist; silty clay; 46 percent clay; 2 percent dark gray (10YR 4/1) fine faint irregular and 2 percent gray (10YR 5/1) fine faint irregular and 10 percent dark yellowish brown (10YR 3/4) fine distinct irregular and 10 percent dark yellowish brown (10YR 4/6) fine prominent irregular mottles; strong coarse and very coarse prismatic parts to moderate coarse angular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 0.5 very fine roots throughout; 0.5 very fine low-continuity tubular pores; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; fragments; noneffervescent, by hcl, 1n; clear wavy boundary. Lab sample # 94P0492; observed in trench. Polygon #2.
    Bw—32 to 53 centimeters (12.6 to 20.9 inches); grayish brown (10YR 5/2), very dark grayish brown (10YR 3/2), moist; silty clay; 50 percent clay; 2 percent very dark gray (10YR 3/1) fine faint irregular and 2 percent gray (10YR 6/1) fine faint irregular and 10 percent dark yellowish brown (10YR 3/4) fine distinct irregular and 10 percent dark yellowish brown (10YR 4/6) fine prominent irregular mottles; strong coarse and very coarse prismatic parts to moderate coarse angular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 3.0 very fine roots between peds; 0.5 very fine low-continuity tubular pores; 2 percent distinct pressure faces on faces of peds; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; fragments; noneffervescent, by hcl, 1n; clear wavy boundary. Lab sample # 94P0493; observed in trench. Polygon #9.; discontinuous - phpvsfiid 207462; discontinuous - phpvsfiid 207462
    Bss—53 to 77 centimeters (20.9 to 30.3 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; silty clay; 50 percent clay; strong coarse and very coarse prismatic parts to moderate coarse subangular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 3.0 very fine roots between peds; 0.5 very fine low-continuity tubular and 0.5 medium moderate-continuity tubular pores; 50 percent distinct slickensides (pedogenic) on faces of peds and 50 percent distinct pressure faces on faces of peds; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; 8 percent fine irregular noncoherent cemented white (10YR 8/1) gypsum masses throughout and 2 percent fine threadlike noncoherent cemented white (10YR 8/1) gypsum threads throughout; fragments; noneffervescent, by hcl, 1n; clear wavy boundary. Lab sample # 94P0494; observed in trench. Polygon #10.; continuous - phpvsfiid 207463; discontinuous - phpvsfiid 207464; continuous - phpvsfiid 207463; discontinuous - phpvsfiid 207464
    Bssy1—77 to 99 centimeters (30.3 to 39.0 inches); brown (10YR 5/3), olive brown (2.5Y 4/3), moist; silty clay; 50 percent clay; 2 percent dark grayish brown (2.5Y 4/2) fine distinct irregular and 2 percent grayish brown (10YR 5/2) fine irregular mottles; strong coarse and very coarse prismatic parts to moderate coarse subangular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 0.5 very fine roots between peds; 0.5 very fine low-continuity tubular and 5.0 medium high-continuity tubular pores; 5 percent distinct very dark grayish brown (10YR 3/2), moist, organic stains in root channels and/or pores and 5 percent distinct dark grayish brown (10YR 4/2), dry, organic stains in root channels and/or pores and 50 percent distinct slickensides (pedogenic) on faces of peds and 50 percent distinct pressure faces on faces of peds; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; 15 percent fine threadlike noncoherent cemented white (10YR 8/1) gypsum threads throughout and 5 percent fine irregular noncoherent cemented white (10YR 8/1) gypsum masses throughout; fragments; noneffervescent, by hcl, 1n; gradual wavy boundary. Lab sample # 94P0495; observed in trench. Polygon #11.; continuous - phpvsfiid 207465; discontinuous - phpvsfiid 207466; continuous - phpvsfiid 207467; continuous - phpvsfiid 207468; continuous - phpvsfiid 207465; discontinuous - phpvsfiid 207466; continuous - phpvsfiid 207467; continuous - phpvsfiid 207468
    Bssy2—99 to 121 centimeters (39.0 to 47.6 inches); yellowish brown (10YR 5/4), olive brown (2.5Y 4/3), moist; silty clay; 50 percent clay; 5 percent grayish brown (2.5Y 5/2) fine distinct irregular and 5 percent light brownish gray (2.5Y 6/2) fine distinct irregular mottles; moderate coarse angular blocky parts to moderate medium angular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 0.5 very fine roots between peds; 5.0 very fine low-continuity tubular and 5.0 fine high-continuity tubular pores; 5 percent distinct very dark grayish brown (10YR 3/2), moist, organic stains in root channels and/or pores and 5 percent distinct dark grayish brown (10YR 4/2), dry, organic stains in root channels and/or pores and 50 percent distinct slickensides (pedogenic) on faces of peds and 50 percent prominent pressure faces on faces of peds; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; 15 percent fine threadlike noncoherent cemented white (10YR 8/1) gypsum threads throughout and 5 percent fine irregular noncoherent cemented white (10YR 8/1) gypsum masses throughout; fragments; noneffervescent, by hcl, 1n; clear wavy boundary. Lab sample # 94P0496; observed in trench. Polygon #12.; discontinuous - phpvsfiid 207470; continuous - phpvsfiid 207469; continuous - phpvsfiid 207471; continuous - phpvsfiid 207472; discontinuous - phpvsfiid 207470; continuous - phpvsfiid 207469; continuous - phpvsfiid 207471; continuous - phpvsfiid 207472
    Bssy1—121 to 170 centimeters (47.6 to 66.9 inches); 60 percent light olive brown (2.5Y 5/3) and 40 percent brown (10YR 5/3), olive brown (2.5Y 4/3), moist; silty clay; 52 percent clay; 10 percent grayish brown (2.5Y 5/2) fine distinct threadlike and 10 percent light brownish gray (2.5Y 6/2) fine distinct threadlike mottles; moderate coarse angular blocky parts to moderate medium angular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 5.0 fine high-continuity tubular pores; 50 percent prominent slickensides (pedogenic) on faces of peds and 50 percent prominent pressure faces on faces of peds; fine threadlike noncoherent cemented white (10YR 8/1) carbonate threads and fine irregular noncoherent cemented white (10YR 8/1) lime masses and 5 percent fine irregular gypsum masses throughout and 2 percent fine threadlike gypsum threads throughout; fragments; slight effervescence, by hcl, 1n; gradual wavy boundary. Lab sample # 94P0497; observed in trench. Polygon #7. This polygon also has the ml feature in the other layers.; discontinuous - phpvsfiid 207474; continuous - phpvsfiid 207473; discontinuous - phpvsfiid 207474; continuous - phpvsfiid 207473
    Bssy2—170 to 186 centimeters (66.9 to 73.2 inches); 70 percent yellowish brown (10YR 5/4) and 30 percent light yellowish brown (2.5Y 6/4), 70 percent olive brown (2.5Y 4/3) and 30 percent yellowish brown (10YR 5/4), moist; silty clay; 52 percent clay; 15 percent light brownish gray (10YR 6/2) fine and medium distinct irregular and 15 percent grayish brown (2.5Y 5/2) fine and medium distinct irregular mottles; moderate medium angular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 5.0 fine high-continuity tubular pores; 20 percent distinct slickensides (pedogenic) on faces of peds; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; 1 percent fine irregular noncoherent cemented white (10YR 8/1) gypsum masses throughout and 1 percent fine threadlike noncoherent cemented white (10YR 8/1) gypsum threads throughout and medium irregular noncoherent cemented white (10YR 8/1) lime masses; fragments; strong effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 94P0498; observed in trench. Polygon #13.; continuous - phpvsfiid 207475; continuous - phpvsfiid 207475
    B'ssy1—186 to 206 centimeters (73.2 to 81.1 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; silty clay; 42 percent clay; 5 percent brown (7.5YR 4/4) medium distinct irregular and 5 percent brown (7.5YR 5/4) medium distinct irregular and 15 percent grayish brown (2.5Y 5/2) fine distinct irregular and 15 percent light brownish gray (2.5Y 6/2) fine distinct irregular mottles; moderate medium angular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 0.5 very fine low-continuity tubular and 0.5 fine high-continuity tubular pores; 5 percent distinct slickensides (pedogenic) on faces of peds and 5 percent prominent pressure faces on faces of peds; 2 percent fine spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; 20 percent fine irregular noncoherent cemented white (10YR 8/1) gypsum masses throughout and 10 percent fine threadlike noncoherent cemented white (10YR 8/1) gypsum threads throughout; fragments; strong effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 94P0499; observed in trench. Polygon #14.; continuous - phpvsfiid 207476; patchy - phpvsfiid 207477; continuous - phpvsfiid 207476; patchy - phpvsfiid 207477
    B'ssy2—206 to 220 centimeters (81.1 to 86.6 inches); light yellowish brown (10YR 6/4), light olive brown (2.5Y 5/3), moist; silty clay; 52 percent clay; 5 percent brown (7.5YR 4/4) medium distinct irregular and 5 percent brown (7.5YR 5/4) medium distinct irregular and 15 percent grayish brown (2.5Y 5/2) fine distinct irregular and 15 percent light brownish gray (2.5Y 6/2) fine distinct irregular mottles; moderate medium angular blocky structure; very hard, firm, moderately sticky, moderately plastic; deformable; medium toughness; 0.5 very fine low-continuity tubular and 0.5 fine high-continuity tubular pores; 5 percent distinct slickensides (pedogenic) on faces of peds and 5 percent distinct pressure faces on faces of peds; 2 percent spherical weakly coherent cemented black (N 2/0) nonmagnetic shot throughout; 5 percent fine irregular noncoherent cemented white (10YR 8/1) gypsum masses throughout and 1 percent fine threadlike noncoherent cemented white (10YR 8/1) gypsum threads throughout; fragments; strong effervescence, by hcl, 1n. Lab sample # 94P0500; observed in trench. Polygon #8.; continuous - phpvsfiid 207478; continuous - phpvsfiid 207479; continuous - phpvsfiid 207478; continuous - phpvsfiid 207479