IDENTIFIERS

Current Taxon Name (Soil Name): Capetown

OSD

Series Extent

User Site ID: 09CA600190

User Pedon ID: 09CA600190

Vegetation Plot ID: 09CA600190

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - NSSL

Lab Pedon # - 09N0342

NCSS Pedon Lab Data NASIS Record ID - 24530

Print Date: 11/21/2024

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: 40.4528139

Std. Longitude: -124.2832583

Datum: WGS84

Location Description: S side of Bear River, N side of Southmayd Ridge from Bear River Ridge Road

Map Unit: 507—Northbear-Caperidge-Capetown complex, 5 to 30 percent slopes

State: California

County: CA023—Humboldt

MLRA: 4—California Coastal Redwood Belt

Non-MLRA Soil Survey Area: CA600—Humboldt County, Central Part, California

7.5 Minute USGS Quad: 40124-D3—Capetown, California

PEDON

Describers Name: JWH, SAA

Current Taxonomic Class: Fine-loamy, mixed, superactive, isomesic Aquic Argiustolls

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 190

Correlated Information:

Soil Name - Capetown (flagged as OSD)

PSC - 55 to 105 cm.

Classificaton Date - 3/25/2013

Classifier - Jonathan Hooper

Soil Taxonomic Edition - eleventh edition

Moisture Class - ustic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Capetown

Classificaton Date - 9/16/2009

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: colluvium derived from mudstone

Landscape: mountains

Landform: mountain slope

Geomorphic Component Mountains: mountainflank, lower third

Hill Slope Profile: backslope

Slope Position: lower third

Slope Complexity: complex

Slope Shape Across: convex

Slope Shape Down: linear

Runoff: high

Drainage Class: moderately well

Geology: Broken Sandstone And Argillite member of the Co3 formation in the Franciscan Complex group.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 9/16/2009 (actual site observation date)

Air Photo ID: 6247-157

Plant Association Name: grand fir-Douglas fir

Surface Cover Properties:

Site Obs. Cover Kind 1 - tree cover

Site Obs. Cover Kind 2 - conifers

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Site Erosion Accelerated: water erosion sheet

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
ABGR BAPI PSME RUUR TODI	Abies grandis Baccharis pilularis Pseudotsuga menziesii Rubus ursinus Toxicodendron diversilobum	grand fir coyotebrush Douglas-fir California blackberry Pacific poison oak	— — — — —	— — — — —	— — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon argillic horizon aquic conditions	3—64 33—200 80—200	—61— —167— —120—

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
9/16/2009	50	—	9

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
28	—	—	134	—	50	1270	—	—	—	—	—	—	—	—	—	—	—	—	—

Oi—0 to 3 centimeters (0.0 to 1.2 inches);, very dark brown (10YR 2/2) rubbed, moist; slightly decomposed plant material; low excavation difficulty; fragments; moderately acid, pH 6.0; abrupt wavy boundary.; moist when described; observed in pit, small

A1—3 to 14 centimeters (1.2 to 5.5 inches); dark grayish brown (10YR 4/2) broken face, black (10YR 2/1) broken face, moist; loam; 24 percent clay; moderate fine granular structure; moderately hard, friable, slightly sticky, moderately plastic; moderate permeability; moderate excavation difficulty; 7.0 very fine roots throughout and 2.0 fine roots throughout; 1.0 very fine irregular and 0.5 very fine tubular and 1.0 medium irregular and 1.0 fine irregular pores; fragments; slightly acid, pH 6.2, chlorophenol red; clear wavy boundary.; moist when described; observed in pit, small

A2—14 to 33 centimeters (5.5 to 13.0 inches); dark grayish brown (10YR 4/2) broken face, black (10YR 2/1) broken face, moist; loam; 24 percent clay; moderate fine granular structure; moderately hard, friable, slightly sticky, moderately plastic; moderately slow permeability; moderate excavation difficulty; 5.0 very fine roots throughout and 6.0 medium roots throughout and 5.0 fine roots throughout and 1.0 coarse roots throughout; 1.0 very fine irregular and 0.5 very fine tubular and 1.0 medium irregular and 1.0 fine irregular pores; fragments; slightly acid, pH 6.2, chlorophenol red; clear wavy boundary.; moist when described; observed in pit, small

ABt—33 to 55 centimeters (13.0 to 21.7 inches); grayish brown (10YR 5/2) broken face, very dark brown (10YR 2/2) broken face, moist; clay loam; 28 percent clay; moderate fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; moderately slow permeability; moderate excavation difficulty; 3.0 very fine roots throughout and 4.0 medium roots throughout and 3.0 fine roots throughout and 1.0 coarse roots throughout; 1.0 very fine tubular pores; 10 percent faint clay films on all faces of peds; fragments; moderately acid, pH 5.6, chlorophenol red; clear wavy boundary.; moist when described; observed in pit, small

Bt1—55 to 80 centimeters (21.7 to 31.5 inches); light yellowish brown (2.5Y 6/3) broken face, olive brown (2.5Y 4/3) broken face, moist; clay loam; 33 percent clay; moderate medium subangular blocky, and moderate fine subangular blocky structure; very hard, firm, moderately sticky, very plastic; moderately slow permeability; moderate excavation difficulty; 3.0 very fine roots throughout and 3.0 medium roots throughout and 1.0 fine roots throughout and 1.0 coarse roots throughout; 2.0 very fine tubular pores; 35 percent faint dark grayish brown (2.5Y 4/2), moist, clay films on all faces of peds; 3 percent by volume nonflat subangular moderately cemented cemented 2-33-75 millimeter mudstone fragments; moderately acid, pH 5.6, chlorophenol red; clear wavy boundary.; moist when described; observed in pit, small

Bt2—80 to 95 centimeters (31.5 to 37.4 inches); light yellowish brown (2.5Y 6/3) broken face, olive brown (2.5Y 4/4) broken face, moist; clay loam; 32 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, firm, moderately sticky, very plastic; moderately slow permeability; moderate excavation difficulty; 2.0 very fine roots throughout and 2.0 medium roots throughout and 2.0 fine roots throughout and 1.0 coarse roots throughout; 2.0 very fine tubular pores; 35 percent faint dark grayish brown (2.5Y 4/2), moist, clay films on all faces of peds; 10 percent fine distinct dark gray (2.5Y 4/1), moist, iron depletions in matrix and 15 percent fine distinct dark yellowish brown (10YR 4/6), moist, iron-manganese masses in matrix; 3 percent by volume nonflat subangular moderately cemented cemented 2-33-75 millimeter mudstone fragments; moderately acid, pH 5.6, chlorophenol red; gradual wavy boundary.; moist when described; observed in pit, small

Bt3—95 to 140 centimeters (37.4 to 55.1 inches); light yellowish brown (2.5Y 6/4) broken face, olive brown (2.5Y 4/4) broken face, moist; clay loam; 30 percent clay; moderate fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; moderately slow permeability; moderate excavation difficulty; 0.5 very fine roots throughout and 1.0 medium roots throughout; 2.0 very fine tubular pores; 35 percent faint olive brown (2.5Y 4/3), moist, clay films on all faces of peds; 5 percent fine distinct dark gray (2.5Y 4/1), moist, iron depletions in matrix and 10 percent fine distinct dark yellowish brown (10YR 4/6), moist, iron-manganese masses in matrix; 8 percent by volume nonflat subangular moderately cemented cemented 2-33-75 millimeter mudstone fragments; moderately acid, pH 5.6, chlorophenol red; clear wavy boundary.; moist when described; observed in pit, small

BCt—140 to 200 centimeters (55.1 to 78.7 inches); light yellowish brown (2.5Y 6/4) broken face, olive brown (2.5Y 4/4) broken face, moist; paragravelly clay loam; 30 percent clay; weak fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; moderately slow permeability; moderate excavation difficulty; 0.5 very fine roots throughout and 1.0 medium roots throughout; 1.0 very fine tubular pores; 10 percent olive brown (2.5Y 4/3), moist, clay films on all faces of peds; 5 percent fine distinct dark yellowish brown (10YR 4/6), moist, iron-manganese masses in matrix; 15 percent by volume nonflat subangular moderately cemented cemented 2-10-75 millimeter mudstone fragments; moderately acid, pH 5.6, chlorophenol red.; moist when described; observed in pit, small