IDENTIFIERS

Current Taxon Name (Soil Name): Rio Piedras

OSD

Series Extent

User Site ID: D09PR003001

User Pedon ID: D09PR003001

User Site Association ID: D09PR003001

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - NSSL

Lab Pedon # - 09N0832

NCSS Pedon Lab Data NASIS Record ID - 24639

Print Date: 3/2/2025

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: 18.3797500

Std. Longitude: -67.1492222

Datum: WGS84

Location Description: Aguada, Puerto Rico. Approximately 1.02 miles northeast from the intersection of PR Hwys. 2 and 417; about 0.77 mile southeast of the Coloso Sugar Cane Mill headquarters on starchy crops plantation. USGS Aguadilla, P.R. topographic quadrangle (1960); lat. 18 degrees 22 minutes 47.1 seconds N; long. 67 degrees 08 minutes 57.2 seconds W.

Map Unit: RpD2—Rio Piedras clay, 12 to 20 percent slopes, eroded

PEDON

Describers Name: Jorge L. Lugo; Samuel Rios; Miguel A. Munoz; Sherlynette Perez-Castro

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 1

Correlated Information:

Soil Name - Rio Piedras

PSC - 25 to 100 cm.

Classificaton Date - 8/12/2011

Soil Taxonomic Edition - eleventh edition

Moisture Class - udic

Moisture Subclass - udic

Sampled As Information:

Soil Name - Rio Piedras

Classificaton Date - 3/2/2009

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Pedon Vegetation and Crop Cover Information:

Current Crop - yams

Hydric: no

SITE

Parent Material: coastal marine sediments

Landscape: coastal plain

Landform: upland slope

Geomorphic Component Hills: side slope

Hill Slope Profile: backslope

Slope Position: upper third

Slope Complexity: simple

Slope Shape Across: linear

Slope Shape Down: convex

Drainage Pattern: dendritic

Runoff: very high

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Geology: Middle Tertiary member of the Stratified Tuffaceous Sand-st formation in the Tts group.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 3/2/2009 (actual site observation date)

Air Photo ID: 14

Hydrology Status: unaltered

Plant Association Name: Cropland

Surface Cover Properties:

Site Obs. Cover Kind 1 - crop cover

Site Obs. Cover Kind 2 - row crop

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Current Weather - partly cloudy

Pedon Restrictions
Kind	Hardness	Restriction Depth L-H	Restriction Thickness L-RV-H
		cm
plinthite	weakly coherent	69 - 163	—

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon cambic horizon plinthite	0—20 20—163 69—163	—- —- —-

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
3/2/2009	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
15	—	—	20	—	30	1992	—	365	25.2	26.4	23.6	—	—	—	—	—	662801	Coloso, Puerto Rico	Weather Service

Ap—0 to 20 centimeters (0.0 to 7.9 inches); reddish brown (5YR 4/4) broken face; 11 percent sand; 24 percent silt; 65 percent clay; weak fine subangular blocky, and weak medium subangular blocky structure; soft, very friable, slightly sticky, moderately plastic; slow permeability; many (5.0) very fine roots throughout and few (0.9) medium roots throughout and many (5.0) fine roots throughout; many (5.0) very fine moderate-continuity irregular and many (5.0) fine moderate-continuity irregular pores; 15 percent prominent spherical black (10YR 2/1), moist, iron-manganese concretions with sharp boundaries in matrix; fragments; noneffervescent, by hcl, 1n; none effervescence, by hydrogen peroxide, unspecified; very strongly acid, pH 4.5, hellige-truog; abrupt wavy boundary. Lab sample # 09N02866; moderately dry when described; observed in pit, large or quarry

Bw1—20 to 36 centimeters (7.9 to 14.2 inches); 60 percent strong brown (7.5YR 5/6) broken face and 40 percent red (2.5YR 4/6) broken face; 13 percent sand; 23 percent silt; 64 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, friable, slightly sticky, moderately plastic; slow permeability; few (0.9) very fine roots throughout and few (0.9) fine roots throughout; few (0.9) fine moderate-continuity irregular pores; 25 percent prominent clay films on all faces of peds; 10 percent prominent spherical strongly coherent cemented black (10YR 2/1), moist, iron-manganese concretions with sharp boundaries in matrix; fragments; noneffervescent, by hcl, 1n; none effervescence, by hydrogen peroxide, unspecified; very strongly acid, pH 4.5, hellige-truog; clear wavy boundary. Lab sample # 09N02867; moderately dry when described; observed in pit, large or quarry. continuous - phpvsfiid 697692; continuous - phpvsfiid 697692

Bw2—36 to 53 centimeters (14.2 to 20.9 inches); 80 percent strong brown (7.5YR 5/6) broken face and 10 percent yellowish red (5YR 5/6) broken face and 10 percent white (10YR 8/1) broken face; 10 percent sand; 26 percent silt; 64 percent clay; weak fine subangular blocky, and weak medium subangular blocky structure; hard, friable, slightly sticky, moderately plastic; slow permeability; few (0.9) fine roots throughout; few (0.9) fine moderate-continuity irregular pores; 30 percent prominent clay films on all faces of peds; 2 percent fine prominent weakly coherent cemented red (10R 4/8), moist, plinthite nodules with sharp boundaries in matrix; 10 percent prominent red (2.5YR 4/6), moist, iron masses with clear boundaries in matrix; fragments; noneffervescent, by hcl, 1n; very strongly acid, pH 4.5, hellige-truog; clear wavy boundary. Lab sample # 09N02868; moderately dry when described; observed in pit, large or quarry. continuous - phpvsfiid 697693; continuous - phpvsfiid 697693

Bw3—53 to 69 centimeters (20.9 to 27.2 inches); 60 percent strong brown (7.5YR 5/6) broken face and 20 percent yellowish red (5YR 5/6) broken face and 20 percent white (10YR 8/1) broken face and yellowish red (5YR 5/6) crushed; 7 percent sand; 30 percent silt; 64 percent clay; weak fine subangular blocky, and weak medium subangular blocky structure; hard, friable, slightly sticky, moderately plastic; slow permeability; few (0.9) fine roots throughout; few (0.9) fine moderate-continuity irregular pores; 30 percent prominent clay films on all faces of peds; 5 percent fine prominent cubic weakly coherent cemented red (10R 4/8), moist, plinthite nodules with sharp boundaries in matrix; fragments; noneffervescent, by hcl, 1n; very strongly acid, pH 5.0, hellige-truog; gradual wavy boundary. Lab sample # 09N02869; moderately dry when described; observed in pit, large or quarry. continuous - phpvsfiid 697694; continuous - phpvsfiid 697694

Bwv1—69 to 104 centimeters (27.2 to 40.9 inches); variegated 40 percent red (2.5YR 4/6) broken face and 30 percent brownish yellow (10YR 6/6) broken face and 15 percent white (10YR 8/1) broken face and 5 percent yellow (10YR 7/8) broken face and yellowish red (5YR 5/6) crushed; 9 percent sand; 33 percent silt; 59 percent clay; structureless massive; hard, firm, slightly sticky, moderately plastic; slow permeability; few (0.9) very fine roots throughout; few (0.9) very fine low-continuity vesicular and many (5.0) very fine moderate-continuity irregular and many (5.0) fine moderate-continuity irregular pores; 30 percent prominent clay films on all faces of peds; 15 percent fine prominent cubic weakly coherent cemented red (10R 4/8), moist, plinthite nodules with sharp boundaries in matrix; fragments; noneffervescent, by hcl, 1n; very strongly acid, pH 5.0, hellige-truog; gradual wavy boundary. Lab sample # 09N02870; moderately dry when described; observed in pit, large or quarry. continuous - phpvsfiid 697695; continuous - phpvsfiid 697695

Bwv2—104 to 135 centimeters (40.9 to 53.1 inches); pale brown (10YR 6/3) broken face; 6 percent sand; 26 percent silt; 68 percent clay; structureless massive; hard, firm, slightly sticky, moderately plastic; slow permeability; few (0.9) very fine roots throughout; few (0.9) very fine low-continuity vesicular and many (5.0) very fine moderate-continuity irregular and many (5.0) fine moderate-continuity irregular pores; 30 percent prominent clay films on all faces of peds; 10 percent fine prominent cubic weakly coherent cemented red (10R 4/8), moist, plinthite nodules with sharp boundaries in matrix; 15 percent prominent red (2.5YR 5/8), moist, iron masses throughout and 2 percent distinct reddish yellow (7.5YR 6/8), moist, iron masses on surfaces along pores; fragments; noneffervescent, by hcl, 1n; very strongly acid, pH 4.5, hellige-truog; diffuse wavy boundary. Lab sample # 09N02871; moderately dry when described; observed in pit, large or quarry. continuous - phpvsfiid 697696; continuous - phpvsfiid 697696

Bwv3—135 to 163 centimeters (53.1 to 64.2 inches); pale yellow (5Y 7/3) broken face; 5 percent sand; 30 percent silt; 66 percent clay; structureless massive; hard, firm, slightly sticky, moderately plastic; slow permeability; few (0.9) very fine roots throughout; few (0.9) very fine moderate-continuity dendritic tubular pores; 45 percent prominent clay films on all faces of peds; 5 percent fine prominent cubic weakly coherent cemented red (10R 4/8), moist, plinthite nodules with sharp boundaries in matrix; 3 percent prominent brownish yellow (10YR 6/8), moist, iron masses with diffuse boundaries in matrix; fragments; noneffervescent, by hcl, 1n; very strongly acid, pH 4.5, hellige-truog; clear wavy boundary. Lab sample # 09N02872; moderately dry when described; observed in pit, large or quarry. continuous - phpvsfiid 697697; continuous - phpvsfiid 697697

C—163 centimeters (64.2 inches); olive (5Y 4/3) broken face; 7 percent sand; 24 percent silt; 69 percent clay; structureless massive; hard, firm, slightly sticky, moderately plastic; slow permeability; few (0.9) very fine roots throughout; few (0.9) very fine moderate-continuity dendritic tubular pores; 10 percent prominent brownish yellow (10YR 6/8), moist, iron masses with diffuse boundaries throughout; fragments; noneffervescent, by hcl, 1n; very strongly acid, pH 4.5, hellige-truog. Lab sample # 09N02873; moderately dry when described; observed in pit, large or quarry