IDENTIFIERS

Current Taxon Name (Soil Name): Halfbluff

OSD

Series Extent

User Site ID: 09CA600647

User Pedon ID: 09CA600647

Vegetation Plot ID: 09CA600647

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - NSSL

Lab Pedon # - 10N0669

NCSS Pedon Lab Data NASIS Record ID - 43221

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: 40.9772500

Std. Longitude: -124.0926944

Datum: WGS84

Location Description: Pasture 500 meters east of Dow's Prairie School

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-H1—Arcata North, California

PEDON

Describers Name: Hooper & Seney

Current Taxonomic Class: Coarse-loamy, mixed, superactive, mesic Oxyaquic Humudepts

Current Taxon Kind: series

Pedon Type: representative pedon for component

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 647

Correlated Information:

Soil Name - Halfbluff

PSC - 25 to 100 cm.

Classificaton Date - 4/19/2012

Soil Taxonomic Edition - twelfth edition

Moisture Class - udic

Moisture Subclass - oxyaquic

Sampled As Information:

Soil Name - Halfbluff

Classificaton Date - 9/28/2009

Moisture Class - udic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: marine deposits derived from mixed sources

Landscape: uplifted coastal plain

Landform: riser on marine terrace

Geomorphic Component Terraces: riser

Hill Slope Profile: backslope

Slope Complexity: simple

Slope Shape Across: concave

Slope Shape Down: linear

Runoff: medium

Drainage Class: moderately well

Flooding: none flooding

Ponding: none ponding

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 9/28/2009 (actual site observation date)

Surface Water Kind: none observed

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

Current Air Temp - 18

Pedon Horizon Lab Results - 1
Horizon	Top Depth	Bottom Depth	Sample ID	Data Collector	Total Clay	CaCO3 Clay	Total Silt	Fine Silt	Co. Silt	Total Sand	Total Sand Method	VC Sand	Co. Sand	Med. Sand	Fine Sand	VF Sand	VF Sand Method	Texture Class - Field Lab	Rubbed Fiber	Unrubbed Fiber	pH H2O
	cm	cm			%	%	%	%	%	%		%	%	%	%	%			%	%
Ap Ap A A Bw Bw C1 C1 C2 C2 Cg Cg	0 0 29 29 58 58 95 95 130 130 157 157	29 29 58 58 95 95 130 130 157 157 180 180	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —

Pedon Horizon Lab Results - 2
Horizon	Top Depth	Bottom Depth	Sample ID	pH CaCl2	pH NaF	pH Ox	Delta pH	LL	PL	PI	Atter. Samp. Cond.	COLE	Pot. Acidity	Ca + Mg - Meh 2	K	Ca + Mg - Sat. Paste	KCl Extract. Acidity	Base Sat. - Meh 2	CEC-7	CEC-8.2
	cm	cm						%	%	%		cm/cm	meq/100g	cmol(+)/kg	cmol(+)/kg	mmol(+)/l	cmol(+)/kg	%	cmol(+)/kg	cmol(+)/kg
Ap Ap A A Bw Bw C1 C1 C2 C2 Cg Cg	0 0 29 29 58 58 95 95 130 130 157 157	29 29 58 58 95 95 130 130 157 157 180 180	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —		— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —

Pedon Horizon Lab Results - 3
Horizon	Top Depth	Bottom Depth	Sample ID	ECEC	Phosphate P	NO3-N	EC	EC Method	EC 1:5 by volume	CaCO3 Equiv.	Equiv. Gypsum	Na	SAR	Gypsum Req.	Humic Color	Fulvic Color	Humic + Fulvic Color	Al	PI	Pyro. Hue	PyrO. Value	Pyro. Chroma
	cm	cm		cmol(+)/kg	mg/kg	mg/kg	dS/m		dS/m	%	%	mmol(+)/l	%	L-pcu/g	L-pcu/g	L-pcu/g	%
Ap Ap A A Bw Bw C1 C1 C2 C2 Cg Cg	0 0 29 29 58 58 95 95 130 130 157 157	29 29 58 58 95 95 130 130 157 157 180 180	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	0 — — 0 0 — 0 — — 0 — 0	— 0 0 — — 0 — 0 0 — 0 —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —	— — — — — — — — — — — —

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
AGROS2 ANOD BROMU HOLA HYRA3 RUUR	Agrostis Anthoxanthum odoratum Bromus Holcus lanatus Hypochaeris radicata Rubus ursinus	bentgrass sweet vernalgrass brome common velvetgrass hairy cat's ear California blackberry	— — — — — —	— — — — — —	— — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
umbric epipedon aquic conditions cambic horizon	0—58 58—180 58—95	—58— —122— —37—

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
9/28/2009	50	—	17

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
7	—	—	71	—	310	1270	—	300	10	14	9	—	—	—	—	—	—	—	—

Ap—0 to 29 centimeters (0.0 to 11.4 inches); very dark brown (10YR 2/2) broken face, brown (10YR 4/3) broken face, dry; loam; 16 percent clay; strong medium granular structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate permeability; 6.0 very fine roots and 0.5 fine roots; 2.0 very fine tubular and 2.0 fine tubular pores; fragments; noneffervescent; strongly acid, pH 5.4, pH indicator strip; clear smooth boundary.; slightly moist when described; observed in pit, large or quarry

A—29 to 58 centimeters (11.4 to 22.8 inches); dark brown (10YR 3/3) broken face, brown (10YR 5/3) broken face, dry; loam; 15 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 3.0 very fine roots and 0.5 fine roots; 2.0 very fine tubular and 2.0 fine tubular pores; fragments; noneffervescent; strongly acid, pH 5.2, pH indicator strip; clear wavy boundary.; slightly moist when described; observed in pit, large or quarry

Bw—58 to 95 centimeters (22.8 to 37.4 inches); 90 percent dark yellowish brown (10YR 4/4) broken face and 10 percent very dark grayish brown (10YR 3/2) broken face, 90 percent very pale brown (10YR 7/4) broken face and 10 percent brown (10YR 5/3) broken face, dry; loamy fine sand; 8 percent clay; weak medium subangular blocky structure; slightly hard, friable, nonsticky, slightly plastic; moderately rapid permeability; 2.0 very fine roots and 1.0 fine roots; 3.0 very fine tubular and 2.0 fine tubular pores; 5 percent fine prominent irregular noncoherent cemented yellowish brown (10YR 5/6), moist, masses of oxidized iron with diffuse boundaries infused into matrix adjacent to pores and 5 percent fine prominent irregular noncoherent cemented yellowish brown (10YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix; fragments; noneffervescent; strongly acid, pH 5.4, pH indicator strip; clear wavy boundary.; moist when described; observed in pit, large or quarry

C1—95 to 130 centimeters (37.4 to 51.2 inches); light olive brown (2.5Y 5/4) broken face, pale yellow (2.5Y 7/4) broken face, dry; fine sand; 2 percent clay; massive; slightly hard, friable, nonsticky, nonplastic; rapid permeability; 0.2 fine roots; 2.0 very fine irregular pores; 5 percent fine prominent irregular noncoherent cemented strong brown (7.5YR 5/6), moist, masses of oxidized iron with diffuse boundaries infused into matrix adjacent to pores and 5 percent fine prominent irregular noncoherent cemented strong brown (7.5YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/6), moist, masses of oxidized iron with diffuse boundaries infused into matrix adjacent to pores and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix and 5 percent fine distinct irregular noncoherent cemented olive brown (2.5Y 4/3), moist, iron depletions with diffuse boundaries in matrix surrounding redox concentrations; fragments; noneffervescent; moderately acid, pH 5.6, pH indicator strip; gradual wavy boundary.; moist when described; observed in pit, large or quarry

C2—130 to 157 centimeters (51.2 to 61.8 inches); light olive brown (2.5Y 5/4) broken face, pale yellow (2.5Y 7/4) broken face, dry; fine sand; 2 percent clay; massive; slightly hard, friable, nonsticky, nonplastic; rapid permeability; 1.0 very fine tubular and 1.0 fine tubular pores; 5 percent fine distinct irregular noncoherent cemented dark grayish brown (2.5Y 4/2), moist, iron depletions with diffuse boundaries in matrix surrounding redox concentrations and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries infused into matrix adjacent to pores and 5 percent fine prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries infused into matrix adjacent to pores and 5 percent fine prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in cracks; fragments; noneffervescent; strongly acid, pH 5.4, pH indicator strip; clear wavy boundary.; moist when described; observed in pit, large or quarry

Cg—157 to 180 centimeters (61.8 to 70.9 inches); light olive brown (2.5Y 5/4) broken face, pale yellow (2.5Y 7/4) broken face, dry; sand; 1 percent clay; massive; slightly hard, friable, nonsticky, nonplastic; rapid permeability; 2.0 very fine interstitial pores; 5 percent fine distinct irregular noncoherent cemented dark grayish brown (2.5Y 4/2), moist, iron depletions with diffuse boundaries in matrix surrounding redox concentrations and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries infused into matrix adjacent to pores and 5 percent fine prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries infused into matrix adjacent to pores and 5 percent fine prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix and 5 percent medium prominent irregular noncoherent cemented strong brown (7.5YR 5/8), moist, masses of oxidized iron with diffuse boundaries in cracks; fragments; noneffervescent; moderately acid, pH 5.6, pH indicator strip.; moist when described; observed in pit, large or quarry