IDENTIFIERS

  • Current Taxon Name (Soil Name): Rillito
  • OSD
  • Series Extent
  • User Site ID: S1971AZ019010
  • User Pedon ID: S1971AZ019010
  • Vegetation Plot ID: S1971AZ019010
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 71C0011
  • NCSS Pedon Lab Data NASIS Record ID - 13231
  • Print Date: 2/16/2025

    • 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: 32.1369438
  • Std. Longitude: -112.7677765
  • Datum: WGS84
  • Township: 15S
  • Range: 5W
  • Section: 10
  • PLSS Details: 3/8 mile south and 3/8 mile west of northeast corner
  • Location Description: Organ Pipe Cactus National Monument.
  • State: Arizona
  • County: AZ019—Pima
  • Non-MLRA Soil Survey Area: AZ648—Cabeza Prieta Area, Arizona, Parts of Pima and Yuma Counties

    • PEDON

  • Describers Name: Y. H. Havens, E. Chamberlin
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 10
  • Sampled As Information:
  • Soil Name - Rillito
  • Taxonomic Class - Coarse-loamy, mixed Typic Calciorthids
  • PSC - 25 to 100 cm.
  • Classificaton Date - 4/8/1971
  • Moisture Class - aridic (torric)
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Slope Shape Down: concave
  • Drainage Class: well
  • Surface Fragments: 50.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/8/1971 (actual site observation date)
  • 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
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    CAGI7

    PARKI2

    PARKI2

    Carnegia gigantea

    Parkinsonia

    Parkinsonia

    saguaro

    paloverde

    paloverde

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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

    3

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    549

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    229

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    20.6

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    A1—0 to 6 centimeters (0.0 to 2.4 inches); light brown (7.5YR 6/4), brown (7.5YR 5/4), moist; gravelly sandy loam; weak medium platy structure; slightly hard, very friable, slightly sticky, slightly plastic; 0.5 very fine roots; 3.0 very fine and fine tubular pores; 40 percent by volume 2-39-75 millimeter unspecified fragments; strong effervescence; moderately alkaline, pH 8.0, thymol-blue; abrupt smooth boundary. Lab sample # 71C00064; dry when described;
    B2—6 to 35 centimeters (2.4 to 13.8 inches); light brown (7.5YR 6/4), brown (7.5YR 4/4), moist; gravelly sandy loam; massive; slightly hard, very friable, slightly sticky, slightly plastic; 21.0 very fine roots and fine and medium roots; 3.0 fine interstitial pores; 15 percent by volume 2-39-75 millimeter unspecified fragments; violent effervescence; moderately alkaline, pH 8.2, thymol-blue; clear wavy boundary. Lab sample # 71C00065; dry when described;
    C1CA—35 to 68 centimeters (13.8 to 26.8 inches); white (10YR 8/1) and light brown (7.5YR 6/4), pink (7.5YR 7/4) and brown (7.5YR 5/4), moist; gravelly loam; massive; hard when dry, friable, slightly sticky, moderately plastic; 0.5 very fine and fine roots; 3.0 very fine tubular pores; 20 percent by volume 2-39-75 millimeter unspecified fragments; violent effervescence; moderately alkaline, pH 8.4, thymol-blue; clear wavy boundary. Lab sample # 71C00066; dry when described;
    C2CA—68 to 122 centimeters (26.8 to 48.0 inches); pinkish white (7.5YR 8/2), light brown (7.5YR 6/4), moist; gravelly sandy loam; massive; very hard, very friable, weakly coherent, slightly sticky, slightly plastic; 0.5 fine and medium roots; 3.0 very fine tubular pores; 50 percent by volume 2-39-75 millimeter unspecified fragments; violent effervescence; moderately alkaline, pH 8.4, thymol-blue. Lab sample # 71C00067; dry when described;