LOCATION HAFLING                 OR

Tentative Series
Rev. JRD/DAL
03/2013

HAFLING SERIES

The Hafling series consists of shallow well drained soils formed in volcanic ash over fractured basalt bedrock on rolling mountain sideslopes and ridges. Slopes are 30 to 60 percent. Mean annual precipitation is about 23 inches and mean annual temperature is about 43 degrees F.

TAXONOMIC CLASS: ashy, glassy, frigid Lithic Vitrixerands

TYPICAL PEDON: Hafling gravelly ashy sandy loam, upland forest. (Colors are for dry soil unless otherwise noted.)

Oi--0 to 1 inche; slightly decomposed pine and fir litter

A1--1 to 4 inches; dark brown (10YR 3/3) gravelly ashy sandy loam, very dark brown (10YR 2/2) moist; strong very thin and thin platy stucture; soft, friable, nonsticky and nonplastic; many very fine and fine roots; many very fine and fine vesicular and irregular pores; 10 percent gravel and 5 percent cobbles; slightly acid (pH 6.2); abrupt smooth boundary. (2 to 4 inches thick)

A2--4 to 13 inches; dark brown (10YR 3/3) cobbly ashy sandy loam, very dark brown (10YR 2/2) moist; moderate fine and medium subangular blocky structure; many very fine and fine irregular and continuous tubular pores; 15 percent gravel and 10 percent cobbles; moderately acid (pH 6.0); abrupt wavy boundary. (8 to 16 inches thick)

2R--13 to 25 inches; fractured basalt

TYPE LOCATION: Crook County, Oregon;
northwest 1/4 of section 3, T. 18 S., R.18 E.;
Latitude: 44 degrees, 02 minutes, 38 seconds N
Longitude: 120 degrees, 33 minutes, 20 seconds W
UTM Coordinates: Zone: 10; Northing: 4879652.5; Easting: 695838.6

RANGE IN CHARACTERISTICS:
Soil temperature regime: frigid
mean annual soil temperature: 37 to 41 degrees F.
mean summer soil temperature: 44 to 49 degrees F.
mean winter soil temperature: 32 to 36 degrees F.
Soil moisture: xeric regime, dry 60 to 90 consecutive days in summer and early fall

Particle-size control section: mineral soil surface to lithic contact, 10 to 20 inches thick
clay content (weighted average): 7 to 18 percent
rock fragment content (weighted average): 5 to 35 percent

Diagnostic horizons and features:
andic material upper boundary at the mineral surface, 10 to 20 inches thick
Al+1/2Fe (aox): 0.4 to 0.8 percent
P retention: 25 to 40 percent
0.2 to 2.0 mm fraction: 60 to 80 percent of fine earth
glass content in the 0.02-2.0 mm fraction: 30 to 50 percent
water content at 1500 kPa (air dried): 8 to 12 percent
mollic epipedon: 10 to 20 inches thick
lithic contact, depth: 10 to 20 inches

Major horizons:
A horizons
color moist: hue 10YR value 2 or 3 chroma 2 or 3
color dry: hue 10YR value 3 to 5 chroma 2 to 4
texture: gravelly ashy loamy sand, gravelly ashy sandy loam, gravelly ashy fine sandy loam, cobbly ashy sandy loam, cobbly ashy loamy sand
clay content: 5 to 20 percent
clay content: 8 to 18 percent
rock fragments: 15 to 35 percent
gravel: 10 to 20 percent
cobbles: 0 to 15 percent
reaction : slightly to moderately acid; pH: 5.6 to 6.5

COMPETING SERIES:
Fremkle - dry for 90 to 110 days in summer and early fall

GEOGRAPHIC SETTING:
Landform: rolling mountain and ridge sideslopes
Slope gradient: 30 to 60 percent
Parent material: volcanic ash over fractured basalt
Elevation: 4,000 to 6,000 feet
Climate: cold, wet winters and hot, dry summers
Mean annual precipitation: 15 to 25 inches
Mean annual temperature: 40 to 45 degrees F.
Frost-free period: 45 to 60 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Normauk (T) - occur on lower backslopes; mineral soil is more than 60 inches to bedrock
Hafmau (T) - occur on upper backslopes and ridges; have an argillic horizon

DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: rapid

USE AND VEGETATION:
Use: timber production, range, wildlife habitat, and water supply
Natural vegetation: Douglas fir, ponderosa pine and elk sedge

DISTRIBUTION AND EXTENT:
Distribution--Central Oregon
Extent: moderate

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES PROPOSED: Crook County, Oregon. 1998

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
andic soil material (ash) 1 to 13 inches A horizons
mollic epipedon 1 to 13 inches A horizons
lithic contact 13 inches

Plant association: CDG 111, Douglas fir/elk sedge (Johnson and Clausnitzer, 1992, Plant Associations of the Blue and Ochoco Mountains)
Plant association group: Douglas fir (dry)

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National Cooperative Soil Survey
U.S.A.