LOCATION HARDESTY WA

Established Series
Rev. NCD/SHB/EMM
02/2012

HARDESTY SERIES

The Hardesty series consists of very deep, moderatley well drained soils that formed in alluvium having more than 60 percent volcanic ash mixed with loess in the upper part. Hardesty soils are on low terraces, in broad basins, in depressions, and on alluvial fans. Slopes are 0 to 8 percent. The mean annual precipitation is about 20 inches, and the mean annual temperature is about 46 degrees F.

TAXONOMIC CLASS: Ashy, glassy, mesic Vitrandic Haploxerolls

TYPICAL PEDON: Hardesty ashy silt loam - woodland. (Colors for dry soil unless otherwise noted. All textures are apparent field textures)

A1--0 to 4 inches; grayish brown (10YR 5/2) ashy silt loam, very dark grayish brown (10YR 3/2) moist; moderate thin platy structure parting to moderate medium granular; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine and fine irregular pores; slightly acid (pH 6.4); abrupt smooth boundary. (4 to 8 inches thick)

A2--4 to 11 inches; brown (10YR 5/3) ashy silt loam, dark brown (10YR 3/3) moist; weak medium platy structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine and fine irregular pores; slightly acid (pH 6.4); clear smooth boundary. (5 to 10 inches thick)

Bw1--11 to 23 inches; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; moderate thick platy structure parting to weak medium subangular blocky; soft, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and few fine irregular pores; few medium distinct brown (7.5YR 4/4) masses of iron-manganese accumulation; neutral (pH 6.6); clear wavy boundary. (12 to 18 inches thick)

Bw2--23 to 32 inches; very pale brown (10YR 7/3) ashy silt loam, brown (10YR 5/3) moist; moderate thick platy structure parting to weak medium subangular blocky; soft, very friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and fine irregular pores; common medium distinct brown (7.5YR 4/4) masses of iron-manganese accumulation; neutral (pH 6.8); abrupt wavy boundary. (7 to 15 inches thick)

C1--32 to 39 inches; very pale brown (10YR 7/4) ashy very fine sandy loam, yellowish brown (10YR 5/4) moist; massive; soft, friable, nonsticky and nonplastic; common very fine and fine roots; few fine irregular pores; few medium distinct brown (7.5YR 4/4) masses of iron-manganese accumulation; neutral (pH 6.8); abrupt wavy boundary. (0 to 1 inches thick)

C2--39 to 60 inches; very pale brown (10YR 8/3) ashy loamy very fine sand, pale brown (10YR 6/3) moist; massive; soft, friable, nonsticky and nonplastic; few very fine and fine roots; few fine irregular pores; coarsely laminated with thin wavy bands that are brown (7.5YR 4/4) moist; neutral (pH 6.8)

TYPE LOCATION: Spokane County, Washington; About 3 miles south of the community of Greenacres, WA; about 2600 feet west and 1800 feet south of the northeast corner of section 35, T. 25 N., R. 44 E. ; Freeman, WA., USGS Topographic quadrangle; Latitude - 47 degrees 37 minutes 22 seconds north and Longitude - 117 degrees 12 minutes 24 seconds west (NAD83 Zone 11)

RANGE IN CHARACTERISTICS:
Thickness of mollic epipedon - 10 to 15 inches
Moisture control section - dry in all parts between 8 and 24 inches for 60 to 75 consecutive days following the summer solstice
Depth to apparent water table - February through April, 30 to 40 inches, with brief periods as high as 23 inches in February; May through January greater than 40 inches
Depth to redoximorphic concentrations - 20 to 40 inches having more than 2 percent
Depth to redoximorphic depletions - greater than 40 inches
Average annual soil temperature - 47 to 50 degrees F
Base saturation (by sum and NH4OAC) greater than 50 percent in the particle size control section
Bulk density - 0.80 to 1.20 g./cc (estimated)
Volcanic glass content - more than 60 percent in the particle-size control section
Reaction - moderately acid to neutral

A horizon
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3, moist or dry
Gravel content - 0 to 5 percent

Bw horizon
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 2 to 4, dry or moist
Texture - ashy silt loam or ashy very fine sandy loam
Gravel content - 0 to 10 percent
Redox features - none to few fine faint to common medium distinct concentrations

BC horizon present in some pedons

C horizon
Value - 6 to 8 dry, 4 to 6 moist
Chroma - 2 to 4, moist or dry
Texture - stratified ashy silt loam, ashy very fine sandy loam, ashy loamy very fine sand, ashy silt and ashy fine sandy loam,
Gravel content - 0 to 10 percent
Redox features - few fine faint to common medium distinct concentrations and none to few depletions below a depth of 40 inches

COMPETING SERIES: These are the Achelake, Dinkels, Hardister, Mansonia, Nemire, Shiva, and Watco series. Achelake soils have sand-sized pumice throughout. Dinkels and Mansonia soils are 40 to 60 inches to a lithic contact. Hardister, Nemire, Shiva and Watco soils do not have aquic conditions or redoximorphic features within 60 inches.

GEOGRAPHIC SETTING: Hardesty soils are on low terraces along intermittent drainageways, in depressions, in broad basins and on alluvial fans at elevations of 1,500 to 3,000 feet. Slopes are 0 to 8 percent. These soils formed in alluvium having more than 60 percent volcanic ash mixed with loess in the upper part. Summers are warm and dry and winters are cool and moist. The mean annual precipitation is 15 to 25 inches. The average January temperature is about 26 degrees F. and the average July temperature is about 68 degrees F. The mean annual temperature is about 46 degrees F. The frost-free season is 90 to 130 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dart, Donavan, Lenz, Opportunity (T), and Spokane soils. Dart soils are sandy and are on terraces. Donavan soils are coarse-loamy and are on toeslopes, footslopes, and backslopes of foothills and mountains. Lenz soils are loamy-skeletal, moderately deep to hard granite and are on foothills. Opportunity soils are loamy-skeletal, very deep and are on outwash terraces. Spokane soils are coarse loamy, moderately deep to weathered granite and are on foothills and mountains.

DRAINAGE AND PERMEABILITY: moderately well drained; moderately high saturated conductivity. These soils are rarely flooded for brief periods from January to February.

USE AND VEGETATION: Hardesty soils are used mainly for cropland. Small grains, alfalfa and grasses are common crops. The potential natural vegetation is ponderosa pine, lodgepole pine, scattered Douglas-fir, pinegrass, bluebunch wheatgrass, Oregon-grape, ninebark, rose, kinnickinnick, strawberry and yarrow.

DISTRIBUTION AND EXTENT: Northeastern Washington. MLRA 44A; Small in extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Spokane, Washington, 1964.

REMARKS: Diagnostic horizons and features recognized in this pedon include:
Mollic epipedon the zone from 0 to 11 inches (A1 and A2 horizons)
Cambic horizon - the zone from 11 to 32 inches (Bw1 and Bw2 horizons)
Particle-size control section - the zone from 10 to 40 inches (part of the A2, Bw1, Bw2, C1 and part of the C2.
Oxyaquic feature - the zone beginning at 23 inches having saturated layers more than 30 cumulative days

The A horizons represent the limit of loess influence.

The 3/2010 revision reflects an update to classification from Ashy, glassy, mesic Aquic Vitrixerands to Ashy, glassy, mesic Vitrandic Haploxerolls based on lab data.

This pedon meets criteria for the Oxyaquic subgroup. Currently, in the 11th edition of Taxonomy, there is no aquandic subgroup within the Haploxerolls Great Group.

ADDITIONAL DATA: Laboratory data available for Soil Survey Sample Numbers: S05WA-063-004, S05WA-063-004 Spokane County, Washington. NSSL Pedon Numbers: 06N0191 and 06N0192 respectively.

National Cooperative Soil Survey
U.S.A.