IDENTIFIERS

Current Taxon Name (Soil Name): Dwarf

OSD

Series Extent

User Site ID: D10PR037002

User Pedon ID: D10PR037002

Transect:

User Transect ID - 2010-001T

Transect Stop Number - 7

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - 87PR108

Lab Pedon # - 87P0304

NCSS Pedon Lab Data NASIS Record ID - 59599

Print Date: 12/4/2024

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: 18.2731944

Std. Longitude: -65.7615833

Datum: WGS84

Location Description: Ceiba, Puerto Rico. Approximately 2.38 miles southeast from the intersection of PR Hwys. 191 and 930; about 2.15 miles southeast from the intersection of PR Hwy. 930 and the Forest paved road no. 27; about 282 feet northeast from Forest paved road no. 27 on Pico del Este Peak at El Yunque National Forest. USGS El Yunque topographic quadrangle (1982); lat. 18 degrees 16 minutes 23.5 seconds N; long. 65 degrees 45 minutes 41.7 seconds W.

Map Unit: DwF—Dwarf muck, 10 to 65 percent slopes, windswept

Non-MLRA Soil Survey Area: PR700—El Yunque National Forest, Puerto Rico

PEDON

Describers Name: Jorge L. Lugo; Samuel Rios

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 2

Correlated Information:

Soil Name - Dwarf

PSC - 25 to 100 cm.

Classificaton Date - 8/4/2011

Soil Taxonomic Edition - eleventh edition

Moisture Class - perudic

Moisture Subclass - udic

Sampled As Information:

Soil Name - Dwarf

Classificaton Date - 5/5/2011

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Pedon Vegetation and Crop Cover Information:

Forest Overstory Veg. Type - tree

Forest Understory Veg. Type - tree

Forest Groundcover Veg. Type Dominant - tree

Forest Groundcover Veg. Type Secondary - tree

Agronomic Feature - tree or vine row with cover

Hydric: yes

SITE

Parent Material: Residuum from volcanic bedrock

Landscape: mountain range

Geomorphic Component Mountains: mountaintop

Hill Slope Profile: summit

Slope Complexity: complex

Slope Shape Across: linear

Slope Shape Down: convex

Drainage Pattern: dendritic

Runoff: medium

Drainage Class: poorly

Flooding: none flooding

Ponding: none ponding

Wet Soil Moisture Duration: 365

Geology: Middle Cretaceous member of the Volcaniclastic Rocks formation in the Ku group.

Surface Fragments: 2.00 percent nonflat angular strongly coherent cemented 2- to 76-millimeter volcanic, unspecified,

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 5/5/2011 (actual site observation date)

Surface Water Kind: none observed

Hydrology Status: unaltered

Plant Association Name: Dwarf Rainforest

Surface Cover Properties:

Site Obs. Cover Kind 1 - tree cover

Site Obs. Cover Kind 2 - tropical

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Current Weather - overcast

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon oxic horizon	3—13 33—224	—- —-

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
8	—	—	1000	—	340	4304	—	365	18.4	19.7	16.9	—	—	—	—	—	666992	Pico del Este, Puerto Rico	Weather Service

Oi—0 to 3 centimeters (0.0 to 1.2 inches); slightly hard, friable, nonsticky, slightly plastic; moderate permeability; fragments; positive to alpha-alpha dipyridyl on 2 percent of the area measured in matrix; noneffervescent; strongly acid, pH 5.5, hellige-truog; abrupt smooth boundary.; wet, non-satiated when described; observed in pit, small

A—3 to 13 centimeters (1.2 to 5.1 inches); 80 percent black (10YR 2/1) broken face and 20 percent dark gray (2.5Y 4/1) broken face; weak fine granular, and weak fine subangular blocky, and weak medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; moderately slow permeability; many (5.0) very fine roots throughout and many (5.0) medium roots throughout and many (5.0) fine roots throughout; few (0.9) very fine moderate-continuity tubular and common (4.0) very fine moderate-continuity irregular and common (4.0) fine moderate-continuity irregular pores; 5 percent fine prominent yellowish red (5YR 4/6), moist, masses of oxidized iron with sharp boundaries between peds and 5 percent medium prominent masses of oxidized iron with sharp boundaries between peds; fragments; positive to alpha-alpha dipyridyl on 2 percent of the area measured in matrix; noneffervescent, by hcl, 1n; strongly acid, pH 5.5, hellige-truog; clear wavy boundary.; wet, non-satiated when described; observed in pit, small

AB—13 to 33 centimeters (5.1 to 13.0 inches); dark gray (2.5Y 4/1) broken face; weak fine subangular blocky, and weak medium subangular blocky structure; hard, firm, slightly sticky, moderately plastic; moderately slow permeability; few (0.9) very fine roots throughout and few (0.9) fine roots throughout; few (0.9) very fine moderate-continuity tubular and common (4.0) very fine moderate-continuity irregular and common (4.0) fine moderate-continuity irregular pores; 7 percent medium prominent yellowish red (5YR 4/6), moist, masses of oxidized iron with sharp boundaries in matrix and 8 percent fine prominent yellowish red (5YR 4/6), moist, masses of oxidized iron with sharp boundaries in matrix; fragments; positive to alpha-alpha dipyridyl on 2 percent of the area measured in matrix; noneffervescent, by hcl, 1n; strongly acid, pH 5.5, hellige-truog; abrupt wavy boundary.; wet, non-satiated when described; observed in pit, small

Bo1—33 to 94 centimeters (13.0 to 37.0 inches); 50 percent strong brown (7.5YR 5/6) broken face and 20 percent yellowish brown (10YR 5/6) broken face; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, firm, slightly sticky, moderately plastic; moderately slow permeability; few (0.9) very fine roots throughout and few (0.9) medium roots throughout and few (0.9) fine roots throughout; few (0.9) very fine moderate-continuity tubular and common (4.0) very fine moderate-continuity irregular and common (4.0) fine moderate-continuity irregular pores; 25 percent prominent red (10R 4/6), moist, iron-manganese masses with sharp boundaries in matrix and 5 percent distinct brownish yellow (10YR 6/8), moist, iron-manganese masses with clear boundaries in matrix; 5 percent by volume iron-manganese concretions fragments; positive to alpha-alpha dipyridyl on 2 percent of the area measured in matrix; noneffervescent, by hcl, 1n; - 5 - percent of the total horizon; strongly acid, pH 5.5, hellige-truog.; wet, non-satiated when described; observed in pit, small

Bo2—94 to 125 centimeters (37.0 to 49.2 inches); 80 percent yellowish red (5YR 5/8) broken face; hard, firm, slightly sticky, moderately plastic; moderately slow permeability; 10 percent prominent iron concretions with sharp boundaries in matrix and 10 percent prominent iron concretions with sharp boundaries in matrix; 5 percent by volume iron-manganese concretions fragments; noneffervescent, by hcl, 1n; - 5 - percent of the total horizon; strongly acid, pH 5.5, hellige-truog.; wet, non-satiated when described; observed in auger, bucket

Bo3—125 to 140 centimeters (49.2 to 55.1 inches); 70 percent reddish yellow (7.5YR 6/8) broken face and 15 percent yellowish red (5YR 5/6) broken face; hard, firm, slightly sticky, moderately plastic; moderately slow permeability; 15 percent distinct red (2.5YR 4/8), moist, iron masses with clear boundaries in matrix; 10 percent by volume iron-manganese concretions fragments; noneffervescent, by hcl, 1n; - 10 - percent of the total horizon; strongly acid, pH 5.5, hellige-truog.; wet, non-satiated when described; observed in auger, bucket

Bo4—140 to 201 centimeters (55.1 to 79.1 inches); 65 percent yellowish red (5YR 5/6) broken face and 20 percent red (2.5YR 5/6) broken face; hard, firm, slightly sticky, moderately plastic; moderately slow permeability; 15 percent faint red (2.5YR 5/8), moist, iron masses with diffuse boundaries in matrix; 4 percent by volume iron-manganese concretions fragments; noneffervescent, by hcl, 1n; - 5 - percent of the total horizon; strongly acid, pH 5.5, hellige-truog.; wet, non-satiated when described; observed in auger, bucket

Bo5—201 to 224 centimeters (79.1 to 88.2 inches); 90 percent strong brown (7.5YR 5/6) broken face; hard, firm, slightly sticky, moderately plastic; moderately slow permeability; 10 percent prominent red (2.5YR 5/8), moist, iron masses with sharp boundaries in matrix; 4 percent by volume iron-manganese concretions fragments; noneffervescent, by hcl, 1n; - 5 - percent of the total horizon; strongly acid, pH 5.5, hellige-truog.; wet, non-satiated when described; observed in auger, bucket