IDENTIFIERS

  • Current Taxon Name (Soil Name): Parguera
  • OSD
  • Series Extent
  • User Site ID: D97PR079004
  • User Pedon ID: D97PR079004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 97P0484
  • NCSS Pedon Lab Data NASIS Record ID - 10167
  • Print Date: 11/14/2025

    • 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: 17.9783333
  • Std. Longitude: -67.0711111
  • Datum: WGS84
  • Location Description: Parguera clay, 0 to 2 percent slopes; approximately 1.9 miles west of the junction of P.R. Hwy. 304 and P.R. Hwy. 324; about 1.5 miles west of La Parguera community; about 20 feet east of dirt road in hay field; Lajas Municipality. (USGS Parguera topographic quadrangle (1966); lat. 17 degrees 58 minutes 42 seconds N. and long. 67 degrees 04 minutes 16 seconds W.)
  • Map Unit: FvA—Fraternidad clay, gravelly clay substratum, 0 to 2 percent slope sPgA—Parguera clay, 0 to 2 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 R. Brannon
  • Current Taxonomic Class: Clayey-skeletal, carbonatic, isohyperthermic Typic Calciargids
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 4
  • Correlated Information:
  • Soil Name - Parguera
  • 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 - Parguera
  • Classificaton Date - 6/19/1997
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: clayey and loamy alluvial sediments that weathered from limestone bedrock
  • Landscape: semiarid upland upland
  • Landform: terrace, alluvial fan
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Drainage Pattern: dendritic
  • Runoff: high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Holocene And Pleistocene (quaternary) member of the Alluvium formation in the Qal group.
  • Surface Fragments: 2.00 percent 2- to 75-millimeter mixed,
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/19/1997 (actual site observation date)
  • Air Photo ID: 10D
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - hayland
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - partly cloudy
    • 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 % % % % % % % % % % % % %

    Ap

    Bt

    2Btk

    2BCk

    3C1

    3C1

    3C2

    3C2

    0

    19

    55

    98

    146

    146

    180

    180

    19

    55

    98

    146

    180

    180

    200

    200

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    0

    0

    0

    0

    0

    0

    0

    0

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    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

    Ap

    Bt

    2Btk

    2BCk

    3C1

    3C1

    3C2

    3C2

    0

    19

    55

    98

    146

    146

    180

    180

    19

    55

    98

    146

    180

    180

    200

    200

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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 %

    Ap

    Bt

    2Btk

    2BCk

    3C1

    3C1

    3C2

    3C2

    0

    19

    55

    98

    146

    146

    180

    180

    19

    55

    98

    146

    180

    180

    200

    200

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    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

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    13

    14

    27

    50

    34

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    22

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

    ochric epipedon

    argillic horizon

    calcic horizon

    0—19

    19—146

    25—146

    13—19—25

    23—127—137

    13—89—89
    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

    1

    —

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    10

    —

    140

    745

    —

    365

    26.9

    28.3

    25.4

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    665693

    Magueyes Island Station

    Weather (NOAA)
    Ap—0 to 19 centimeters (0.0 to 7.5 inches); dark yellowish brown (10YR 3/4) broken face, dark brown (10YR 3/3) broken face, moist; clay; 11 percent sand; 30 percent silt; 59 percent clay; strong medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; slow permeability; 6.0 very fine roots throughout and 3.0 medium roots throughout and 6.0 fine roots throughout; 6.0 very fine interstitial and 3.0 fine interstitial pores; 2 percent by volume 2-50-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; slightly alkaline, pH 7.4, pH meter; clear wavy boundary. Lab sample # 97P02902; dry when described; observed in pit, large or quarry
    Bt—19 to 55 centimeters (7.5 to 21.7 inches); dark yellowish brown (10YR 3/4) broken face, dark yellowish brown (10YR 3/4) broken face, moist; clay; 23 percent sand; 28 percent silt; 49 percent clay; strong medium angular blocky structure; slightly hard, firm, moderately sticky, moderately plastic; slow permeability; 3.0 medium roots throughout and 3.0 fine roots throughout; 6.0 very fine interstitial and 3.0 fine tubular pores; 2 percent by volume 2-50-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter; abrupt wavy boundary. Lab sample # 97P02903; dry when described; observed in pit, large or quarry
    2Btk—55 to 98 centimeters (21.7 to 38.6 inches); dark yellowish brown (10YR 4/4) broken face, dark yellowish brown (10YR 4/6) broken face, moist; extremely gravelly clay loam; 44 percent sand; 22 percent silt; 34 percent clay; weak medium subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; slow permeability; 6.0 very fine roots throughout and 6.0 medium roots throughout and 6.0 fine roots throughout; 6.0 very fine interstitial and 6.0 fine interstitial pores; 10 percent very fine distinct threadlike carbonate masses with clear boundaries around rock fragments; 83 percent by volume 2-50-75 millimeter mixed fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; clear wavy boundary. Lab sample # 97P02904; dry when described; observed in pit, large or quarry
    2BCk—98 to 146 centimeters (38.6 to 57.5 inches); light yellowish brown (10YR 6/4) broken face, dark yellowish brown (10YR 4/6) broken face, moist; extremely gravelly coarse sandy loam; 61 percent sand; 21 percent silt; 18 percent clay; weak medium subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; slow permeability; 6.0 very fine roots throughout and 3.0 medium roots throughout and 6.0 fine roots throughout; 6.0 very fine interstitial and 3.0 medium interstitial and 6.0 fine interstitial pores; 1 percent medium distinct pink (7.5YR 8/4), moist, and pinkish white (7.5YR 8/2), dry, masses of oxidized iron with clear boundaries in matrix; 1 percent very fine distinct threadlike carbonate masses with clear boundaries around rock fragments; 77 percent by volume 2-50-75 millimeter mixed fragments; violent effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; abrupt smooth boundary. Lab sample # 97P02905; dry when described; observed in pit, large or quarry
    3C1—146 to 180 centimeters (57.5 to 70.9 inches); yellowish red (5YR 4/6) broken face, strong brown (7.5YR 4/6) broken face, moist; clay; 18 percent sand; 36 percent silt; 46 percent clay; massive; slightly hard, firm, moderately sticky, moderately plastic; slow permeability; 0.5 fine roots throughout; 3.0 very fine interstitial and 3.0 fine interstitial pores; 10 percent medium distinct pink (7.5YR 8/4), moist, and pinkish white (7.5YR 8/2), dry, masses of oxidized iron with clear boundaries in matrix; 25 percent fine prominent threadlike carbonate masses with sharp boundaries in matrix; 2 percent by volume 2-50-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; clear wavy boundary. Lab sample # 97P02906; dry when described; observed in pit, large or quarry
    3C2—180 to 200 centimeters (70.9 to 78.7 inches); yellowish red (5YR 4/6) broken face, strong brown (7.5YR 4/6) broken face, moist; clay; 12 percent sand; 30 percent silt; 58 percent clay; massive; slightly hard, firm, moderately sticky, moderately plastic; slow permeability; 0.5 very fine roots throughout; 3.0 very fine interstitial pores; 10 percent medium distinct pink (7.5YR 8/4), moist, and pinkish white (7.5YR 8/2), dry, masses of oxidized iron with clear boundaries in matrix; 1 percent fine prominent threadlike carbonate masses with sharp boundaries in matrix; 2 percent by volume 2-50-75 millimeter mixed fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter. Lab sample # 97P02907; dry when described; observed in pit, large or quarry