IDENTIFIERS

  • Current Taxon Name (Soil Name): Roundtop
  • OSD
  • Series Extent
  • User Site ID: S1991HI003001
  • User Pedon ID: 91HI003001
  • Vegetation Plot ID: S1991HI003001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 91P0360
  • NCSS Pedon Lab Data NASIS Record ID - 63406
  • Print Date: 11/22/2024

    • 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: 21.3101768
  • Std. Longitude: -157.8202667
  • Datum: WGS84
  • State: Hawaii
  • County: HI003—Honolulu
  • MLRA: 164—Humid and Very Humid Steep and Very Steep Mountain Slopes

    • PEDON

  • Describers Name: Nicule Simmons and Chris Smith
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Roundtop
  • Taxonomic Class - Fine, halloysitic Andic Hapludolls
  • PSC - 25 to 100 cm.
  • Classificaton Date - 1/1/1991
  • Moisture Class - perudic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: dome or volcanic cone
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: upper third
  • Runoff: very low
  • Drainage Class: well
  • Surface Fragments: 0.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 1/1/1991 (actual site observation date)
  • Microrelief Elevation: 35
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - hardwoods
  • 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

    PSGU

    ZINGI

    Psidium guajava

    Zingiber

    guava

    ginger

    —

    —

    —

    —

    —

    —
    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    cambic horizon

    0—25

    25—102

    —-

    —-
    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

    100

    —

    —

    427

    —

    315

    300

    —

    —

    21

    23

    19

    —

    —

    16

    —

    —

    —

    780

    —
    A—0 to 36 centimeters (0.0 to 14.2 inches); dark brown (7.5YR 3/2) gravelly silty clay; weak fine and medium subangular blocky, and weak medium granular structure; friable, slightly sticky, moderately plastic; 5.5 very fine and fine roots throughout and 0.5 medium and coarse roots throughout; 2.5 very fine and fine tubular and 0.5 very fine and fine interstitial pores; prominent , moist, manganese or iron-manganese stains on rock fragments; 25 percent by volume 2-39-75 millimeter unspecified fragments; moderately acid, pH 6.0, lamotte-morgan; clear smooth boundary. Lab sample # 91P02061; moist when described;. bulk sample taken for lab; few medium and coarse roots throughout; many very fine and fine roots throughout; patchy - phpvsfiid 226549; patchy - phpvsfiid 226549
    Bw1—36 to 64 centimeters (14.2 to 25.2 inches); dark brown (7.5YR 3/4) silty clay; moderate medium subangular blocky, and strong fine and medium granular structure; very friable, moderately sticky, moderately plastic; 5.5 very fine and fine roots throughout and 0.5 medium and coarse roots throughout; 2.5 very fine interstitial and 2.5 fine and medium tubular pores; 5 percent by volume 2-39-75 millimeter unspecified fragments; slightly acid, pH 6.2, lamotte-morgan; clear smooth boundary.; moist when described;. few medium and coarse roots throughout; many very fine and fine roots throughout
    Bw2—64 to 91 centimeters (25.2 to 35.8 inches); dark brown (7.5YR 3/4) gravelly silty clay; moderate medium subangular blocky, and strong fine and medium granular structure; very friable, moderately sticky, moderately plastic; 2.5 very fine and fine roots throughout and 0.5 medium roots throughout; 0.5 very fine interstitial and 2.5 fine and medium tubular pores; prominent , moist, manganese or iron-manganese stains on rock fragments; 20 percent by volume 2-39-75 millimeter unspecified fragments; neutral, pH 6.8, lamotte-morgan; clear smooth boundary.; moist when described;. estimated permeability is moderately rapid; few medium roots throughout; common very fine and fine roots throughout; patchy - phpvsfiid 226550; patchy - phpvsfiid 226550
    Bw3—91 to 102 centimeters (35.8 to 40.2 inches); dark brown (7.5YR 3/4) silty clay; massive, and weak fine subangular blocky; very friable, moderately sticky, moderately plastic; moderately smeary; 0.5 very fine and fine roots throughout and 0.5 medium roots throughout; 2.5 very fine and fine tubular pores; prominent , moist, manganese or iron-manganese stains on rock fragments; 10 percent by volume 2-39-75 millimeter unspecified fragments; moderately acid, pH 6.0, lamotte-morgan; clear smooth boundary. Lab sample # 91P02060; moist when described;. bulk and clod samples taken for lab; few very fine and fine roots throughout; few medium roots throughout; patchy - phpvsfiid 226551; patchy - phpvsfiid 226551
    2C—102 to 132 centimeters (40.2 to 52.0 inches); dark brown (7.5YR 3/4) cobbly silty clay; strong very fine and fine granular structure; very friable, moderately sticky, moderately plastic; 0.5 very fine and fine roots throughout and 0.5 medium roots throughout; 5.5 fine and medium void between rock fragments pores; prominent , moist, manganese or iron-manganese stains on rock fragments; 85 percent by volume 75-162-250 millimeter unspecified fragments; slightly acid, pH 6.2, lamotte-morgan; abrupt wavy boundary.; moist when described;. few very fine and fine roots throughout; few medium roots throughout; patchy - phpvsfiid 226552; patchy - phpvsfiid 226552
    2Cr—132 to 178 centimeters (52.0 to 70.1 inches); red (2.5YR 4/8) and yellowish red (5YR 4/6); massive; 5.5 very fine and fine vesicular pores; prominent , moist, manganese or iron-manganese stains on rock fragments; fragments; abrupt wavy boundary.; moist when described;. when field moist, small pieces crush with difficulty between fingers; patchy - phpvsfiid 226553; patchy - phpvsfiid 226553