IDENTIFIERS

Current Taxon Name (Soil Name): Bigtree

OSD

Series Extent

User Site ID: 04CA605REDW041

User Pedon ID: 04CA605REDW041

Vegetation Plot ID: 04CA605REDW041

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - NSSL

Lab Pedon # - 04N1046

NCSS Pedon Lab Data NASIS Record ID - 17230

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: 41.3880278

Std. Longitude: -124.0159722

Datum: WGS84

Township: 12N

Range: 1E

Section: 36

PLSS Details: northwest quarter, northwest quarter

Location Description: Prairie Creek Redwood State Park, Humboldt County, California; located approximately 0.2 kilometers on South Fork trail; 10 meters south of trail.

Map Unit: 174—Bigtree-Mystery complex, 2 to 9 percent slopes

State: California

County: CA023—Humboldt

MLRA: 4—California Coastal Redwood Belt

Non-MLRA Soil Survey Area: CA605—Humboldt and Del Norte Area, California

7.5 Minute USGS Quad: 41124-D1—Fern Canyon, California

PEDON

Describers Name: Alaina Frazier

Current Taxonomic Class: Fine-loamy, isotic, isomesic Andic Humudepts

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 441

Correlated Information:

Soil Name - Bigtree

PSC - 25 to 100 cm.

Classificaton Date - 5/31/2012

Soil Taxonomic Edition - eleventh edition

Moisture Class - udic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Bigtree

Classificaton Date - 6/8/2004

Dynamic Soil Properties:

Erosion Class - 0

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: alluvium derived from mixed sources

Landform: low terrace

Geomorphic Component Terraces: tread

Hill Slope Profile: backslope

Slope Complexity: simple

Slope Shape Across: linear

Slope Shape Down: linear

Runoff: medium

Drainage Class: well

Flooding: very rare flooding for very brief periods begining in feb

Ponding: none ponding

Bedrock: mixed

Geology: Alluvium formation.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 6/8/2004 (actual site observation date)

Air Photo ID: 6246-207

Surface Water Kind: none observed

Plant Association Name: Redwood, moist

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

Current Air Temp - 10

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
OXOR POMU SESE3 TROV2 TSHE VAOV2	Oxalis oregana Polystichum munitum Sequoia sempervirens Trillium ovatum Tsuga heterophylla Vaccinium ovatum	redwood-sorrel western swordfern redwood Pacific trillium western hemlock California huckleberry	— — — — — —	— — — — — —	— — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
umbric epipedon cambic horizon	0—26 26—120	—26— —94—

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
6/8/2004	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
2	—	—	85	—	285	1700	—	310	12	14	9	—	—	—	—	—	—	—	—

A1—0 to 15 centimeters (0.0 to 5.9 inches); very dark brown (10YR 2/2) broken face, dark grayish brown (10YR 4/2) broken face, dry; loam; 15 percent clay; moderate fine subangular blocky, and moderate very fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; moderate permeability; 5.0 very fine roots and 3.0 very coarse roots and 2.0 medium roots and 5.0 fine roots and 2.0 coarse roots; 10.0 very fine interstitial and 3.0 medium tubular and 10.0 fine interstitial and 3.0 fine tubular pores; 3 percent by volume nonflat rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; slightly acid, pH 6.2, pH indicator strip; abrupt smooth boundary. Lab sample # 04N05610; moist when described; observed in pit, small

A2—15 to 26 centimeters (5.9 to 10.2 inches); dark brown (10YR 3/3) broken face, brown (10YR 5/3) broken face, dry; loam; 18 percent clay; moderate very fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 3.0 very fine roots and 3.0 very coarse roots and 5.0 medium roots and 4.0 fine roots and 5.0 coarse roots; 5.0 very fine interstitial and 3.0 medium tubular and 5.0 fine interstitial and 3.0 fine tubular pores; 3 percent by volume nonflat rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 6.0, pH indicator strip; abrupt wavy boundary. Lab sample # 04N05611; moist when described; observed in pit, small

Bw1—26 to 56 centimeters (10.2 to 22.0 inches); dark yellowish brown (10YR 4/6) broken face, yellowish brown (10YR 5/6) broken face, dry; loam; 21 percent clay; weak fine subangular blocky, and weak very fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 2.0 very coarse roots and 5.0 medium roots and 5.0 fine roots and 3.0 coarse roots; 3.0 very fine interstitial and 2.0 fine tubular and 3.0 fine interstitial pores; 2 percent by volume nonflat rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; strongly acid, pH 5.4, pH indicator strip; abrupt smooth boundary. Lab sample # 04N05612; moist when described; observed in pit, small

Bw2—56 to 105 centimeters (22.0 to 41.3 inches); dark yellowish brown (10YR 3/4) broken face, light yellowish brown (2.5Y 6/4) broken face, dry; loam; 20 percent clay; weak fine subangular blocky structure; moderately hard, firm, slightly sticky, slightly plastic; moderate permeability; 2.0 very coarse roots and 4.0 medium roots and 4.0 fine roots; 2.0 very fine interstitial and 2.0 fine interstitial and 1.0 fine tubular pores; 1 percent by volume nonflat rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 5.6, pH indicator strip; abrupt smooth boundary. Lab sample # 04N05613; moist when described; observed in pit, small

Bw3—105 to 120 centimeters (41.3 to 47.2 inches); olive brown (2.5Y 4/4) broken face, light yellowish brown (2.5Y 6/4) broken face, dry; loam; 22 percent clay; weak fine subangular blocky structure; moderately hard, firm, slightly sticky, slightly plastic; moderate permeability; 3.0 medium roots and 3.0 fine roots and 1.0 coarse roots; 2.0 very fine interstitial and 2.0 fine interstitial pores; 1 percent by volume nonflat rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; strongly acid, pH 5.2, pH indicator strip; abrupt smooth boundary. Lab sample # 04N05614; moist when described; observed in pit, small

2C1—120 to 145 centimeters (47.2 to 57.1 inches); very dark grayish brown (2.5Y 3/2) broken face, grayish brown (2.5Y 5/2) broken face, dry; sandy loam; 13 percent clay; structureless single grain; loose, loose, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots; 2.0 very fine interstitial and 2.0 fine interstitial pores; 7 percent by volume nonflat rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; strongly acid, pH 5.2, pH indicator strip; clear smooth boundary. Lab sample # 04N05615; moist when described; observed in pit, small

3C2—145 to 160 centimeters (57.1 to 63.0 inches); olive brown (2.5Y 4/3) broken face, light yellowish brown (2.5Y 6/3) broken face, dry; silt loam; 18 percent clay; structureless massive; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots; 1.0 very fine interstitial and 1.0 fine interstitial pores; 1 percent by volume nonflat rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; very strongly acid, pH 5.0, pH indicator strip. Lab sample # 04N05616; moist when described; observed in pit, small