IDENTIFIERS

  • Current Taxon Name (Soil Name): Pandura
  • OSD
  • Series Extent
  • User Site ID: D09PR129001
  • User Pedon ID: D09PR129001
  • User Site Association ID: D09PR129001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 09N0827
  • NCSS Pedon Lab Data NASIS Record ID - 24634
  • Print Date: 4/23/2025

    • 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: 18.1214444
  • Std. Longitude: -65.9599444
  • Datum: WGS84
  • Location Description: San Lorenzo, Puerto Rico. Approximately 4.9 miles southeast of San Lorenzo downtown from the intersection of PR Highway 181 and 183; about 1.8 miles northeast from the intersection of PR Highway 181 and 745 on pastureland. USGS Yabucoa, P.R. Topographic Quadrangle (1960). Lat. 18 degrees 07 minutes 17.2 seconds N. ; Long. 65 degrees 57 minutes 35.8 seconds W.
  • Map Unit: PaF—Pandura sandy loam, 40 to 60 percent slopes
  • Non-MLRA Soil Survey Area: PR686—San Juan Area, Puerto Rico

    • PEDON

  • Describers Name: Jorge L. Lugo; Samuel Rios; Ellis Benham
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Pandura
  • PSC - 25 to 100 cm.
  • Classificaton Date - 8/10/2011
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Pandura
  • Classificaton Date - 3/31/2009
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Residuum and colluvium from granodirite
  • Landform: mountain slope
  • Geomorphic Component Mountains: mountainflank
  • Hill Slope Profile: backslope
  • Slope Position: lower third
  • Slope Complexity: complex
  • Slope Shape Across: concave
  • Slope Shape Down: linear
  • Drainage Pattern: dendritic
  • Runoff: high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: weakly coherent strong weathered granodiorite at 117cm
  • Geology: Middle Cretaceous member of the Granodiorite Of San Lorenzo formation in the Kl group.
  • Surface Fragments:
  • Benchmark Soil?: yes

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 3/31/2009 (actual site observation date)
  • Air Photo ID: Photo 52
  • Plant Association Name: Pastureland
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - pastureland, tame
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - overcast
    • Site Soil Temperature
    Site Obs. Date Depth Sensor Kind Temperature
    cm C

    3/31/2009

    50

    —

    21
    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

    50

    —

    —

    280

    —

    135

    2387

    —

    365

    23.7

    26.6

    23.3

    —

    —

    —

    —

    —

    668815

    San Lorenzo 3S, Puerto Rico

    Weather Service
    Ap—0 to 20 centimeters (0.0 to 7.9 inches); very dark grayish brown (10YR 3/2) broken face; 58 percent sand; 22 percent silt; 19 percent clay; moderate fine granular, and moderate medium granular structure; slightly hard, friable, nonsticky, slightly plastic; moderately rapid permeability; many (6.0) very fine roots throughout and many (6.0) medium roots throughout and many (6.0) fine roots throughout; many (6.0) medium moderate-continuity irregular and many (6.0) fine moderate-continuity irregular pores; 5 percent by volume 2-?-5 millimeter granodiorite fragments; negative to alpha-alpha dipyridyl; noneffervescent, by hcl, 1n; strongly acid, pH 5.5, hellige-truog; abrupt wavy boundary. Lab sample # 09N02844; moist when described; observed in cut
    Bw1—20 to 48 centimeters (7.9 to 18.9 inches); yellowish brown (10YR 5/4) broken face; 50 percent sand; 28 percent silt; 23 percent clay; weak fine subangular blocky, and weak medium subangular blocky structure; slightly hard, friable, nonsticky, slightly plastic; moderately rapid permeability; common (4.0) medium roots throughout and common (4.0) fine roots throughout; many (6.0) very fine low-continuity irregular and many (6.0) fine low-continuity irregular pores; faint clay films on all faces of peds and faint clay films between sand grains; 9 percent by volume granodiorite fragments; negative to alpha-alpha dipyridyl; noneffervescent, by hcl, 1n; very strongly acid, pH 5.0, hellige-truog; clear irregular boundary. Lab sample # 09N02845; moist when described; observed in cut. continuous - phpvsfiid 697686; continuous - phpvsfiid 697687; continuous - phpvsfiid 697686; continuous - phpvsfiid 697687
    Bw2—48 to 88 centimeters (18.9 to 34.6 inches); 70 percent light yellowish brown (10YR 6/4) broken face and 25 percent brownish yellow (10YR 6/6) broken face and 5 percent pale yellow (2.5Y 8/3) broken face; 53 percent sand; 27 percent silt; 20 percent clay; weak fine subangular blocky, and weak medium subangular blocky structure; slightly hard, friable, nonsticky, slightly plastic; moderately rapid permeability; few (0.9) medium roots throughout and few (0.9) fine roots throughout; 5 percent faint clay bridges between sand grains and 5 percent faint clay bridges on all faces of peds; 1 percent by volume 2-?-75 millimeter granodiorite fragments; negative to alpha-alpha dipyridyl; noneffervescent, by hcl, 1n; very strongly acid, pH 5.0, hellige-truog; clear wavy boundary. Lab sample # 09N02846; moist when described; observed in cut. continuous - phpvsfiid 697688; continuous - phpvsfiid 697689; continuous - phpvsfiid 697688; continuous - phpvsfiid 697689
    C—88 to 117 centimeters (34.6 to 46.1 inches); variegated 25 percent very dark gray (10YR 3/1) broken face and 25 percent light yellowish brown (10YR 6/4) broken face and 25 percent brownish yellow (10YR 6/6) broken face and 25 percent pale yellow (2.5Y 8/3) broken face; 59 percent sand; 25 percent silt; 16 percent clay; structureless massive, and weak medium subangular blocky, and weak coarse subangular blocky; slightly hard, friable, nonsticky, nonplastic; moderately rapid permeability; few (0.9) very fine roots throughout and few (0.9) fine roots throughout; common (4.0) very fine moderate-continuity irregular and common (4.0) fine moderate-continuity irregular pores; faint clay films on all faces of peds and faint clay films between sand grains; 4 percent by volume 2-?-75 millimeter granodiorite fragments; negative to alpha-alpha dipyridyl; noneffervescent, by hcl, 1n; moderately acid, pH 6.0, hellige-truog; abrupt irregular boundary. Lab sample # 09N02847; moist when described; observed in cut. continuous - phpvsfiid 697690; continuous - phpvsfiid 697691; continuous - phpvsfiid 697690; continuous - phpvsfiid 697691
    Cr—117 to 150 centimeters (46.1 to 59.1 inches); 75 percent pale brown (10YR 6/3) broken face and 10 percent very dark gray (10YR 3/1) broken face and 10 percent yellowish brown (10YR 5/6) broken face and 5 percent pale yellow (2.5Y 8/3) broken face; 45 percent sand; 44 percent silt; 11 percent clay; few (0.9) very fine roots around fragments and few (0.9) fine roots around fragments; fragments; negative to alpha-alpha dipyridyl; noneffervescent, by hcl, 1n; neutral, pH 7.0, hellige-truog. Lab sample # 09N02848; moist when described; observed in cut