IDENTIFIERS

  • Current Taxon Name (Soil Name): Valpac
  • OSD
  • Series Extent
  • User Site ID: 80CA067012
  • User Pedon ID: 80CA067012
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 81P0314
  • NCSS Pedon Lab Data NASIS Record ID - 49158
  • Print Date: 4/21/2025

    • 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: 38.1658333
  • Std. Longitude: -121.6594444
  • Datum: WGS84
  • Location Description: About 2 miles east of Rio Vista, 1.3 miles north of intersection of Hwy. 160 and Hwy. 120 on Hwy. 160, about 0.55 miles east on a dirt road and 20 feet south of the dirt road.
  • Map Unit: 232—Valpac sandy loam, mucky substratum, partially drained, 0 to 2 percent slopes
  • State: California
  • County: CA067—Sacramento
  • MLRA: 16—California Delta
  • Non-MLRA Soil Survey Area: CA067—Sacramento County, California
  • 7.5 Minute USGS Quad: 38121-B6—Rio Vista, California

    • PEDON

  • Describers Name: Arlene J. Tugel
  • Current Taxonomic Class: Fine-loamy, superactive, thermic Thapto-Histic Endoaquolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: classifies to current taxon name, brief description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Valpac
  • PSC - 25 to 100 cm.
  • Classificaton Date - 10/13/2016
  • Classifier - Ed Tallyn
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Vorden
  • Taxonomic Class - Fine, mixed, thermic Thapto-Histic Haplaquolls
  • Taxon Kind - variant
  • PSC - 25 to 100 cm.
  • Classificaton Date - 10/29/1980
  • Classifier - Arlene J. Tugel
  • Moisture Class - aquic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Pedon Vegetation and Crop Cover Information:
  • Current Crop - corn
  • Hydric: yes


    • SITE

  • Landscape: delta plain
  • Landform: backswamp
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: poorly
  • Surface Fragments:
  • Benchmark Soil?: no
  • RaCA Information:
  • Plot or Site Recorder - Arlene Tugel, Bill Reed, Jack Wright

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/29/1980 (actual site observation date)
  • Data Collector: Arlene J. Tugel, Bill Reed, Jack Wright
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • Pedoderm Loose Cover Indicator - no
  • Drained? - yes
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    sapric soil materials

    0—69

    84—135

    —69—

    —-
    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

    0.5

    —

    —

    -1.5

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 23 centimeters (0.0 to 9.1 inches); very dark brown (10YR 2/2), grayish brown (10YR 5/2), dry; loam; massive; slightly hard, friable, slightly sticky, slightly plastic; few medium roots and common fine roots; few very fine interstitial pores; fragments; neutral, pH 6.8; abrupt wavy boundary.; dry when described;
    A1—23 to 41 centimeters (9.1 to 16.1 inches); very dark brown (10YR 2/2), dark grayish brown (10YR 4/2), dry; loam; massive; slightly hard, friable, slightly sticky, slightly plastic; few very fine roots and few medium roots and few fine roots; common very fine interstitial pores; fragments; slightly alkaline, pH 7.8; clear wavy boundary.; moist when described;
    A2—41 to 66 centimeters (16.1 to 26.0 inches); very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; loam; massive; slightly hard, firm, slightly sticky, slightly plastic; few very fine roots and few medium roots; few very fine tubular and few very fine interstitial pores; fine prominent yellowish brown (10YR 5/8), moist, masses of oxidized iron and fine distinct 10YR 2/ (10YR 2/), moist, manganese masses; fragments; slightly alkaline, pH 7.8; abrupt wavy boundary. Lab sample # 81P01613; moist when described;. redox described as few fine prominent yellow brown (10RY 5/8) and many fine distinct black (N2/0) mottles; Stratified with discontinuous pockets of sand, 1/2 to 5 inches thick.
    2Ab—66 to 84 centimeters (26.0 to 33.1 inches); black (N 2/),, very dark gray (10YR 3/1) and black (N 2/),, dry; mucky silty clay; massive; slightly hard, firm, slightly sticky, slightly plastic; few very fine roots and few medium roots and few fine roots; few very fine interstitial and few fine tubular pores; fragments; slightly alkaline, pH 7.5; gradual wavy boundary. Lab sample # 81P01614; moist when described;. Stratified with discontinuous bands of strong brown (7.5YR 4/6) burnt material, moist, 1/2 to 2 inches thick.
    3Oa—84 to 135 centimeters (33.1 to 53.1 inches); black (N 2/), rubbed and dark yellowish brown (10YR 3/4) broken face, black (N 2/), broken face, dry; muck; massive; hard, friable, nonsticky, nonplastic; few very fine roots; fragments; strongly acid, pH 5.1; clear wavy boundary. Lab sample # 81P01615; moist when described;. Tule and reed fibers stratified with discontinuous bands of strong brown (7.5RY 4/6) burnt material, moist, 1/2 to 2 inches thick.; about 90 percent fibers, 2 percent rubbed
    3Ab—135 to 152 centimeters (53.1 to 59.8 inches); dark yellowish brown (10YR 3/4), black (N 2/),, dry; mucky clay; massive; hard, friable, nonsticky, nonplastic; few very fine roots; few very fine interstitial pores; fragments; neutral, pH 7.0.; moist when described;