LOCATION FRYCANYON IDEstablished Series
TAXONOMIC CLASS: Coarse-silty, mixed, superactive, frigid Vitrandic Hapludalfs
TYPICAL PEDON: Frycanyon ashy silt loam, cultivated; on a 3 percent slope at 2,320 feet elevation. When described on May 21, 1996, the soil was moist throughout. (Colors are for dry soil unless otherwise stated.)
Ap1--0 to 6 inches; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; weak fine and medium subangular blocky structure parting to weak very fine granular; slightly hard, friable, slightly sticky and slightly plastic; many very fine, few fine and medium roots; many very fine and few fine tubular pores; slightly acid (pH 6.5); gradual wavy boundary. (5 to 12 inches thick)
Ap2--6 to 11 inches; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; weak medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, few fine roots; many very fine and few fine tubular pores; neutral (pH 6.6); clear wavy boundary. (0 to 6 inches thick)
BA--11 to 17 inches; pale yellow (2.5Y 7/3) silt loam, light olive brown (2.5Y 5/3) moist; weak medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, few fine roots; many very fine, few fine tubular pores; slightly acid (pH 6.5); clear wavy boundary. (5 to 12 inches thick)
Bt1--17 to 27 inches; pale yellow (2.5Y 8/3) silt loam, light olive brown (2.5Y 5/3) moist; weak medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, few fine roots; many very fine and few fine tubular pores; few faint clay films on faces of peds and lining pores; few thin brown (7.5YR 4/4) moist discontinuous lamellae 1/8 to 1/2 inch thick ; slightly acid (pH 6.5); gradual wavy boundary. (7 to 12 inches thick)
Bt2--27 to 34 inches; pale yellow (2.5Y 8/3) silt loam, light olive brown (2.5Y 5/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine and few fine tubular pores; few faint clay films on faces of peds and lining pores; few thin brown (7.5YR 4/4) moist discontinuous lamellae 1/8 to 1/2 inch thick; slightly acid (pH 6.5); gradual wavy boundary. (5 to 12 inches thick)
Bt3--34 to 42 inches; mixed very pale brown (10YR 7/4) and pale yellow (2.5Y 8/3) silt loam, mixed yellowish brown (10YR 5/4) and light olive brown (2.5Y 5/3) moist; weak fine and medium subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few very fine roots; many very fine and few fine tubular pores; common faint and few distinct clay films on faces of peds and lining pores; few prominent silt coats on surfaces of peds; many thin yellowish brown (10YR 5/4) moist discontinuous lamellae 1/4 to 1/2 inch thick; neutral (pH 6.8); gradual wavy boundary. (6 to 15 inches thick)
Bt4--42 to 46 inches; pale yellow (2.5Y 7/4) silt loam, light olive brown (2.5Y 5/4) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; many very fine and few fine tubular pores; few faint clay films on faces of peds and lining pores; many thin yellowish brown (10YR 5/4) moist discontinuous lamellae 1/4 to 1/2 inch thick; slightly effervescent (calcium carbonate); slightly alkaline (pH 7.8); clear wavy boundary. (4 to 10 inches thick)
Bk--46 to 52 inches; pale yellow (2.5Y 7/3) silt loam, light olive brown (2.5Y 5/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and few fine tubular pores; violently effervescent (calcium carbonate); few fine and medium hard lime concretions, common fine lime in seams and soft masses; moderately alkaline (pH 8.0); clear wavy boundary. (4 to 10 inches thick)
BC--52 to 60 inches; pale yellow (2.5Y 7/3) silt loam, light olive brown (2.5Y 5/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and few fine tubular pores; violently effervescent (calcium carbonate); moderately alkaline (pH 8.0); clear wavy boundary. (0 to 8 inches thick)
C--60 to 62 inches; light yellowish brown (2.5Y 6/3) loamy very fine sand, olive brown (2.5Y 4/3) moist; massive; soft, very friable, slightly sticky and nonplastic; many very fine irregular pores; slightly effervescent (calcium carbonate); moderately alkaline (pH 8.0).
TYPE LOCATION: Boundary County, Idaho; about 3 miles northeast of Bonners Ferry; about 150 feet south and 100 feet west of the northeast corner sec. 14, T. 62 N., R. 1 E.
Latitude - 48 degrees, 43 minutes, 52 seconds North;
Longitude - 116 degrees, 16 minutes, 45 seconds West.
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 43 to 46 degrees F.
Average summer soil temperature - 52 to 56 degrees F.
Depth to secondary calcium carbonates - 40 to 56 inches
Volcanic ash influence - 10 to 18 inches thick surface layers
Volcanic glass content - 5 to 20 percent
Acid-oxalate extractable Al + 1/2 Fe - 0.4 to 1.0 percent
Moist bulk density - 1.0 to 1.2 g/cc
Phosphate retention - 25 to 55 percent
Ap horizons
Chroma - 2 or 3 dry or moist
Texture - ASHY-SIL, ASHY-VFSL
Clay content - 4 to 14 percent
Reaction - slightly acid or neutral
A horizon (present in undisturbed pedons)
Value - 4 or 5 dry, 2 or 3 moist
Chroma - 2 or 3 dry or moist
Texture - ASHY-SIL, ASHY-VFSL
Thickness - 1 to 3 inches
Reaction - slightly acid or neutral
BA horizon
Hue - 2.5Y, 10YR
Value - 6 or 7 dry, 4 or 5 moist
Chroma - 3 or 4 dry or moist
Texture - SIL, VFSL, ASHY-SIL, ASHY-VFSL
Clay content - 4 to 14 percent
Reaction - slightly acid or neutral
Bw horizon (present in some pedons)
Value - 5 through 7 dry, 3 through 5 moist
Chroma - 3 or 4 dry or moist
Texture - ASHY-SIL, ASHY-VFSL
Reaction - slightly acid or neutral
Bt horizons
Hue - 2.5Y, 10YR
Value - 6 through 8 dry, 4 through 6 moist
Chroma - 3 or 4 dry or moist
Texture - SIL, VFSL
Clay content - 8 to 20 percent (averages < 18 percent)
Lamellae - 1/16 to 2 inches thick, 7.5YR or 10YR 4/4, 5/4, 4/6 moist, clay content from 16 to 25 percent
Effervescence - none to slightly effervescent (calcium carbonate)
Calcium carbonate equivalent - 0 to 5 percent
Reaction - slightly acid to slightly alkaline
Btk horizon (present in some pedons)
Texture - SIL, VFSL
Calcium carbonate - lime in soft masses, seams and hard concretions
Bk horizon
Value - 7 or 8 dry, 5 or 6 moist
Chroma - 3 or 4 dry or moist
Texture - SIL, VFSL
Clay content - 5 to 15 percent
Effervescence - strongly to violently effervescent (calcium carbonate)
Calcium carbonate equivalent - 10 to 20 percent
BC horizon (absent in some pedons)
Value - 7 or 8 dry, 5 or 6 moist
Texture - SIL, VFSL, LVFS
Clay content - 0 to 15 percent
Effervescence - slightly to violently effervescent (calcium carbonate)
Calcium carbonate equivalent - 0 to 10 percent
C horizon
Value - 6 through 8 dry, 4 through 6 moist
Chroma - 2 or 3 dry or moist
Texture - LVFS, VFSL, SIL
Clay content - 0 to 15 percent
Effervescence - none to slightly effervescent (calcium carbonate)
Calcium carbonate equivalent - 0 to 5 percent
COMPETING SERIES: This is the Rubson series. Rubson soils do not have a Bk horizon.
GEOGRAPHIC SETTING: Frycanyon soils are on terraces. Slopes range from 0 to 15 percent. These soils formed in glaciolacustrine sediments with minor amounts of volcanic ash mixed in the surface layers. Elevation ranges from 2,200 to 2,400 feet. The average annual precipitation is 28 to 32 inches and average annual air temperature is 42 to 45 degrees F. The average frost-free period is 100 to 135 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Artnoc, Caboose, Crash, Elmira, Porthill, Rubson, and Wishbone soils. Artnoc, Caboose, Crash, and Wishbone soils are on terrace escarpments and contain less volcanic ash. Elmira soils are on dunes and are sandy. Porthill soils are on terraces and have Bt horizons with more than 35 percent clay. Rubson soils are on terraces and do not have Bk horizons.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: Woodland, wildlife habitat, recreation, and dry-farm cropland. The principal crops are small grains, alfalfa hay, and pasture. Some areas are used for tree nurseries and homesites. Natural vegetation is mainly western hemlock, western redcedar, western white pine, Douglas-fir, grand fir, and western larch, with an understory of longtube twinflower, queencup beadlily, starry false Solomons seal, darkwoods violet, bunchberry dogwood, baldhip rose, elk sedge, Oregon fairybells, pine reedgrass, and white spirea.
DISTRIBUTION AND EXTENT: Northern Idaho, and possibly northwestern Montana, and northeastern Washington. The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Boundary County, Idaho, 2002.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 0 to 11 inches (Ap1 and
Ap2 horizons)
Argillic horizon - the zone from 17 to 46 inches (Bt1, Bt2, Bt3, and Bt4 horizons)
Volcanic ash influence - the zone from 0 to 11 inches (Ap1 and Ap2 horizons)
Particle-size control section - the zone from 17 to 37 inches (Bt1, Bt2, and part of the Bt3 horizon)