IDENTIFIERS

  • Current Taxon Name (Soil Name): Guayacan
  • OSD
  • Series Extent
  • User Site ID: D97PR079001
  • User Pedon ID: D97PR079001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 97P0481
  • NCSS Pedon Lab Data NASIS Record ID - 10164
  • Print Date: 1/30/2025

    • 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: 17.9661111
  • Std. Longitude: -67.0916667
  • Datum: WGS84
  • Location Description: Guayacan clay, 0 to 5 percent slopes; approximately 2.9 miles southwest of La Parguera community; about 2.2 miles southeast of Rancho Cabassa; about 100 feet east of dirt road in pastureland; Lajas Municipality. (USGS Parguera topographic quadrangle (1966); lat. 17 degrees 57 minutes 58 seconds N. and long. 67 degrees 5 minutes 30 seconds W.)
  • Map Unit: PoA—Pozo Blanco loam, 0 to 2 percent slopesPzB—Pozo Blanco gravelly clay loam, 0 to 5 percent slopesGyB—Guayacan clay, 0 to 5 percent slopes
  • Non-MLRA Soil Survey Area: PR687—Lajas Valley Area, Puerto RicoPR787—San German Area, Southwestern Puerto Rico

    • PEDON

  • Describers Name: Jorge L. Lugo; Carmen L. Santiago; Greg Brannon
  • Current Taxonomic Class: Fine-loamy, mixed, superactive, isohyperthermic Typic Haplocalcids
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Guayacan
  • PSC - 25 to 100 cm.
  • Classificaton Date - 2/27/2009
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Pozo Blanco
  • Classificaton Date - 6/17/1997
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: material that weathered from limestone
  • Landscape: upland
  • Landform: low hill, alluvial fan
  • Geomorphic Component Hills: base slope
  • Hill Slope Profile: toeslope
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Drainage Pattern: parallel
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Holocene And Pleistocene member of the Alluvium formation in the Qal group.
  • Surface Fragments: 24.00 percent 2- to 75-millimeter limestone, unspecified,
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/17/1997 (actual site observation date)
  • Air Photo ID: 10D
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - sunny
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    C

    2C

    3C

    115

    150

    193

    150

    193

    230

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    0

    0

    0

    0

    0

    0

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    C

    2C

    3C

    115

    150

    193

    150

    193

    230

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    C

    2C

    3C

    115

    150

    193

    150

    193

    230

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    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

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    4

    9

    11

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

    ochric epipedon

    cambic horizon

    calcic horizon

    0—20

    20—31

    31—115

    10—20—38

    10—20—35

    69—84—89
    Site Soil Temperature
    Site Obs. Date Depth Sensor Kind Temperature
    cm C

    6/17/1997

    50

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    28
    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

    2

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    12

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    174

    668

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    365

    26.5

    28.1

    24.6

    28

    29.4

    26

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    2066

    Combate Station

    NRCS-NWCC SCAN
    Ap—0 to 20 centimeters (0.0 to 7.9 inches); dark brown (10YR 3/3) broken face, dark brown (7.5YR 3/3) broken face, moist; gravelly clay; 28 percent sand; 27 percent silt; 46 percent clay; strong medium granular structure; slightly hard, firm, slightly sticky, slightly plastic; moderately slow permeability; 10.0 very fine roots throughout and 10.0 medium roots throughout and 10.0 fine roots throughout; 10.0 very fine interstitial pores; 24 percent by volume 2-?-75 millimeter mixed fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter; clear wavy boundary.; dry when described; observed in pit, large or quarry
    Bw—20 to 31 centimeters (7.9 to 12.2 inches); dark brown (10YR 3/3) broken face, very dark grayish brown (10YR 3/2) broken face, moist; gravelly clay; 26 percent sand; 27 percent silt; 47 percent clay; strong medium angular blocky structure; slightly hard, firm, slightly sticky, moderately plastic; moderately slow permeability; 10.0 very fine roots throughout and 1.0 medium roots throughout and 10.0 fine roots throughout; 10.0 very fine vesicular and 10.0 very fine tubular and 1.0 fine tubular and 1.0 fine vesicular pores; 24 percent by volume 2-?-75 millimeter mixed fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.2, pH meter; clear wavy boundary.; dry when described; observed in pit, large or quarry
    Bk1—31 to 65 centimeters (12.2 to 25.6 inches); brown (10YR 4/3) broken face, dark yellowish brown (10YR 4/4) broken face, moist; gravelly clay; 31 percent sand; 28 percent silt; 41 percent clay; moderate medium subangular blocky structure; hard, firm, slightly sticky, moderately plastic; moderately slow permeability; 10.0 very fine roots throughout and 1.0 fine roots throughout; 10.0 very fine tubular and 10.0 very fine vesicular and 1.0 fine tubular and 1.0 fine vesicular pores; 10 percent carbonate bands; 35 percent by volume 2-?-75 millimeter mixed fragments; slight effervescence, by hcl, 1n; moderately alkaline, pH 8.4, pH meter; abrupt wavy boundary.; dry when described; observed in pit, large or quarry
    Bk2—65 to 115 centimeters (25.6 to 45.3 inches); brown (10YR 5/3) broken face, yellowish brown (10YR 5/4) broken face, moist; very gravelly loam; 44 percent sand; 33 percent silt; 23 percent clay; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderately slow permeability; 10.0 very fine roots throughout and 4.0 fine roots throughout; 10.0 very fine tubular and 10.0 very fine vesicular and 4.0 fine tubular and 4.0 fine vesicular pores; 30 percent prominent carbonate masses; 51 percent by volume 2-?-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; clear wavy boundary.; dry when described; observed in pit, large or quarry
    C—115 to 150 centimeters (45.3 to 59.1 inches); brown (10YR 5/3) broken face, brown (10YR 4/3) broken face, moist; very gravelly loam; 44 percent sand; 31 percent silt; 25 percent clay; massive; hard, friable, slightly sticky, nonplastic; moderately slow permeability; 10.0 very fine roots throughout and 4.0 fine roots throughout; 10.0 very fine tubular and 10.0 very fine vesicular and 1.0 fine tubular and 1.0 fine vesicular pores; 10 percent prominent carbonate masses; 41 percent by volume 2-?-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; clear wavy boundary.; dry when described; observed in pit, large or quarry
    2C—150 to 193 centimeters (59.1 to 76.0 inches); very dark gray (10YR 3/1) broken face, very dark grayish brown (10YR 3/2) broken face, moist; very gravelly silt; 9 percent sand; 80 percent silt; 10 percent clay; massive; hard, friable, slightly sticky, nonplastic; moderately slow permeability; 1.0 very fine roots throughout; 10.0 very fine tubular and 10.0 very fine vesicular pores; 30 percent prominent very pale brown (10YR 7/3), moist, carbonate masses; 46 percent by volume 2-?-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.6, pH meter; gradual wavy boundary.; dry when described; observed in pit, large or quarry
    3C—193 to 230 centimeters (76.0 to 90.6 inches); very dark gray (10YR 3/1) broken face, very dark grayish brown (10YR 3/2) broken face, moist; very gravelly clay loam; 30 percent sand; 32 percent silt; 38 percent clay; massive; hard, friable, slightly sticky, slightly plastic; moderately slow permeability; 1.0 medium roots throughout and 1.0 fine roots throughout; 1.0 very fine tubular and 1.0 very fine vesicular pores; 10 percent prominent very pale brown (10YR 7/3), moist, carbonate masses; 41 percent by volume 2-?-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter.; dry when described; observed in pit, large or quarry