IDENTIFIERS

Current Taxon Name (Soil Name): Capetown

OSD

Series Extent

User Site ID: S2007CA600004

User Pedon ID: S2007CA600004

Vegetation Plot ID: S2007CA600004

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - NSSL

Lab Pedon # - 07N0363

NCSS Pedon Lab Data NASIS Record ID - 18876

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: 40.4411305

Std. Longitude: -124.2711151

Datum: WGS84

Location Description: Southmayd Ridge

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: Aszman, Sue

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

Current Taxon Kind: series

Pedon Type: classifies to current taxon name, full description

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 4

Correlated Information:

Soil Name - Capetown

PSC - 95 to 180 cm.

Classificaton Date - 12/17/2009

Soil Taxonomic Edition - tenth edition

Moisture Class - ustic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Ferncat

Classificaton Date - 1/22/2007

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, center third

Slope Complexity: complex

Slope Shape Across: linear

Slope Shape Down: concave

Runoff: very high

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

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

Surface Fragments: 15.00 percent nonflat subrounded indurated 2- to 75-millimeter conglomerate, unspecified, 15.00 percent nonflat subangular strongly coherent cemented 2- to 75-millimeter sandstone, unspecified,

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 1/22/2007 (actual site observation date)

Air Photo ID: 6247-157

Plant Association Name: Douglas fir-grand fir

Surface Cover Properties:

Site Obs. Cover Kind 1 - tree cover

Site Obs. Cover Kind 2 - intermixed conifers and hardwoods

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 LIDE3 POMU PSME VAOV2	Abies grandis Lithocarpus densiflorus Polystichum munitum Pseudotsuga menziesii Vaccinium ovatum	grand fir tanoak western swordfern Douglas-fir California huckleberry	— — — — —	— — — — —	— — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon cambic horizon	0—22 22—90	—22— —68—

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
58	—	—	322	—	120	1473	—	260	11	—	—	10	—	—	—	—	—	—	—

Oi—0 to 3 centimeters (0.0 to 1.2 inches); slightly decomposed plant material; Ksat of 5 um/s; 10 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments and 15 percent by volume nonflat subangular moderately coherent cemented 2-20-75 millimeter mudstone fragments; noneffervescent; abrupt wavy boundary.; observed in cut

A—3 to 25 centimeters (1.2 to 9.8 inches); brown (10YR 5/3), dark brown (10YR 3/3), moist; gravelly loam; 24 percent clay; strong fine granular structure; moderately hard, friable, moderately sticky, slightly plastic; Ksat of 5 um/s; 1.0 very fine roots throughout and 3.0 medium roots throughout and 1.0 fine roots throughout; 0.5 very fine tubular and 0.5 medium tubular and 0.5 fine tubular pores; 2 percent by volume nonflat subangular strongly coherent cemented 75-100-250 millimeter mudstone fragments and 20 percent by volume nonflat subangular moderately coherent cemented 2-20-75 millimeter mudstone fragments and 20 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments; noneffervescent; moderately acid, pH 5.8; clear wavy boundary. Lab sample # 07N01866; moist when described; observed in cut

AB—25 to 75 centimeters (9.8 to 29.5 inches); pale brown (10YR 6/3), dark yellowish brown (10YR 3/4), moist; gravelly loam; 26 percent clay; weak medium subangular blocky structure; hard, firm, moderately sticky, slightly plastic; Ksat of 0.5 um/s; 0.5 very fine roots throughout and 1.0 medium roots throughout and 0.5 fine roots throughout and 1.0 coarse roots throughout; 0.5 very fine tubular and 0.5 medium tubular and 0.5 fine tubular pores; 20 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments and 20 percent by volume nonflat subangular moderately coherent cemented 2-20-75 millimeter mudstone fragments; noneffervescent; moderately acid, pH 5.6; gradual wavy boundary. Lab sample # 07N01867; moist when described; observed in cut

Bt1—75 to 95 centimeters (29.5 to 37.4 inches); pale brown (10YR 6/3), dark yellowish brown (10YR 3/4), moist; gravelly clay loam; 28 percent clay; weak medium subangular blocky structure; hard, firm, moderately sticky, moderately plastic; Ksat of 0.5 um/s; 0.5 very fine roots throughout and 1.0 medium roots throughout and 0.5 fine roots throughout and 1.0 coarse roots throughout; 0.5 very fine tubular and 0.5 medium tubular and 0.5 fine tubular pores; 2 percent faint clay films on rock fragments; 20 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments and 20 percent by volume nonflat subangular moderately coherent cemented 2-20-75 millimeter mudstone fragments; noneffervescent; moderately acid, pH 5.6; clear wavy boundary.; moist when described; observed in cut

Bt2—95 to 125 centimeters (37.4 to 49.2 inches); light yellowish brown (10YR 6/4), dark yellowish brown (10YR 4/4), moist; gravelly clay loam; 32 percent clay; weak fine subangular blocky structure; hard, firm, moderately sticky, moderately plastic; Ksat of 0.5 um/s; 0.5 very fine roots throughout and 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 0.5 very fine tubular and 0.5 medium tubular and 0.5 fine tubular pores; 10 percent faint clay films on rock fragments; 15 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments and 15 percent by volume nonflat subangular moderately coherent cemented 2-20-75 millimeter mudstone fragments; noneffervescent; strongly acid, pH 5.5; gradual wavy boundary.; moist when described; observed in cut

Bt3—125 to 180 centimeters (49.2 to 70.9 inches); 70 percent light olive brown (2.5Y 5/3) and 30 percent light brownish gray (10YR 6/2), 70 percent dark grayish brown (2.5Y 4/2) and 30 percent dark yellowish brown (10YR 4/4), moist; gravelly clay loam; 33 percent clay; structureless massive; hard, firm, moderately sticky, moderately plastic; Ksat of 0.5 um/s; 0.5 very fine roots throughout and 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 0.5 very fine tubular and 0.5 medium tubular and 0.5 fine tubular pores; 5 percent faint clay films on rock fragments; 15 percent by volume nonflat subangular moderately coherent cemented 2-20-75 millimeter mudstone fragments and 15 percent by volume nonflat subangular strongly coherent cemented 2-20-75 millimeter mudstone fragments; noneffervescent; moderately acid, pH 5.6.; moist when described; observed in cut