IDENTIFIERS

Current Taxon Name (Soil Name): Johnnyjack

OSD

Series Extent

User Site ID: 05CA601439

User Pedon ID: 05CA601439

Vegetation Plot ID: 05CA601439

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - NSSL

Lab Pedon # - 05N0651

NCSS Pedon Lab Data NASIS Record ID - 18185

Print Date: 1/29/2025

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: 40.2783333

Std. Longitude: -124.2458333

Datum: WGS84

Township: 2s

Range: 2W

Section: 24

Location Description: About 8 miles northwest of the town of Honeydew. Mattole Rd between Honeydew and Petrolia

Map Unit: 188—Johnnyjack, 0 to 2 percent slopes

State: California

County: CA023—Humboldt

MLRA: 5—Siskiyou-Trinity Area

Non-MLRA Soil Survey Area: CA601—Humboldt County, South Part, California

7.5 Minute USGS Quad: 40124-C2—Buckeye Mountain, California

PEDON

Describers Name: JWH, JTB, JRS

Current Taxonomic Class: Fine-silty, mixed, superactive, thermic Cumulic Ultic Haploxerolls

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 439

Correlated Information:

Soil Name - Johnnyjack

PSC - 25 to 100 cm.

Classificaton Date - 11/7/2011

Soil Taxonomic Edition - twelfth edition

Moisture Class - xeric

Moisture Subclass - typic

Sampled As Information:

Soil Name - Mattole

Classificaton Date - 5/4/2005

Dynamic Soil Properties:

Erosion Class - 0

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: alluvium derived from metasedimentary rock

Landscape: river valley

Landform: 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: none flooding

Ponding: none ponding

Geology: Quaternary Alluvium member.

Surface Fragments: 0.00 percent nonflat subrounded strongly coherent cemented 2- to 75-millimeter sandstone, unspecified,

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 5/4/2005 (actual site observation date)

Air Photo ID: 6247-128

Surface Water Kind: none observed

Plant Association Name: pasture

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

Site Obs. Cover Kind 2 - pastureland, tame

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
2GA 2GP AVENA	— — Avena	Grass, annual Grass, perennial oat	— — —	— — —	— — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon cambic horizon	0—68 68—152	—- —-

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
5/4/2005	50	—	22

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
1	—	—	37	—	45	2030	—	260	13	—	—	15	—	—	—	—	—	—	—

Ap—0 to 22 centimeters (0.0 to 8.7 inches); brown (10YR 5/3) rubbed, very dark grayish brown (10YR 3/2) rubbed, moist; silt loam; 25 percent clay; strong very fine subangular blocky, and strong fine subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; 7.0 very fine roots throughout and 0.5 fine roots throughout; 0.5 very fine tubular and 0.5 fine tubular pores; 25 percent fine prominent noncoherent cemented dark yellowish brown (10YR 4/6), moist, iron-manganese masses on surfaces along root channels; 3 percent by volume nonflat subrounded strongly cemented cemented 2-20-75 millimeter sedimentary, unspecified fragments; noneffervescent; very strongly acid, pH 4.9, pH meter; clear smooth boundary.; moist when described; observed in pit, small

A1—22 to 40 centimeters (8.7 to 15.7 inches); brown (10YR 5/3) broken face, very dark grayish brown (10YR 3/2) broken face, moist; silty clay loam; 31 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; 3.0 very fine roots throughout and 0.5 fine roots throughout; 5.0 very fine tubular and 0.5 medium tubular and 0.5 fine tubular and 2.0 coarse tubular pores; 1 percent by volume nonflat subrounded strongly cemented cemented 2-20-75 millimeter sedimentary, unspecified fragments; noneffervescent; strongly acid, pH 5.3, pH meter; gradual smooth boundary.; moist when described; observed in pit, small

A2—40 to 68 centimeters (15.7 to 26.8 inches); grayish brown (10YR 5/2) broken face, very dark gray (10YR 3/1) broken face, moist; silty clay loam; 34 percent clay; weak medium subangular blocky, and weak fine subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; 1.0 very fine roots throughout; 5.0 very fine tubular and 0.5 medium tubular and 0.5 fine tubular and 1.0 coarse tubular pores; 2 percent by volume nonflat subrounded strongly cemented cemented 2-20-75 millimeter sedimentary, unspecified fragments; noneffervescent; strongly acid, pH 5.5, pH meter; gradual smooth boundary.; moist when described; observed in pit, small

Bw1—68 to 96 centimeters (26.8 to 37.8 inches); light olive brown (2.5Y 5/3) broken face, dark grayish brown (10YR 4/2) broken face, moist; silty clay loam; 31 percent clay; weak medium subangular blocky, and weak fine subangular blocky structure; moderately hard, friable, slightly sticky, moderately plastic; 1.0 very fine roots throughout; 5.0 very fine tubular and 0.5 medium tubular and 0.5 fine tubular pores; 7 percent by volume nonflat subrounded strongly cemented cemented 2-20-75 millimeter sedimentary, unspecified fragments; noneffervescent; moderately acid, pH 5.6, pH meter; gradual smooth boundary.; moist when described; observed in pit, small

Bw2—96 to 122 centimeters (37.8 to 48.0 inches); light yellowish brown (2.5Y 6/3) broken face, brown (10YR 4/3) broken face, moist; clay loam; 28 percent clay; weak medium subangular blocky, and weak fine subangular blocky structure; moderately hard, friable, slightly sticky, moderately plastic; 1.0 very fine roots throughout; 5.0 very fine tubular and 0.5 medium tubular and 0.5 fine tubular pores; 11 percent by volume nonflat subrounded strongly cemented cemented 2-20-75 millimeter sedimentary, unspecified fragments; noneffervescent; moderately acid, pH 5.8, pH meter; clear smooth boundary.; moist when described; observed in pit, small

BC—122 to 152 centimeters (48.0 to 59.8 inches); light yellowish brown (2.5Y 6/3) broken face, olive brown (2.5Y 4/3) broken face, moist; very gravelly loam; 25 percent clay; weak fine subangular blocky, and weak medium subangular blocky structure; moderately hard, friable, slightly sticky, moderately plastic; 0.5 very fine roots throughout; 3.0 very fine tubular and 1.0 fine tubular pores; 36 percent by volume nonflat subrounded strongly cemented cemented 2-20-75 millimeter sedimentary, unspecified fragments; noneffervescent; moderately acid, pH 5.7, pH meter; gradual smooth boundary.; moist when described; observed in pit, small

C—152 to 200 centimeters (59.8 to 78.7 inches); light yellowish brown (2.5Y 6/3) broken face, olive brown (2.5Y 4/3) broken face, moist; gravelly loam; 23 percent clay; massive; moderately hard, friable, slightly sticky, moderately plastic; 31 percent by volume nonflat subrounded strongly cemented cemented 2-20-75 millimeter sedimentary, unspecified fragments; noneffervescent; moderately acid, pH 5.8, pH meter.; moist when described; observed in pit, small