LOCATION NAZATON ID
Established Series
Rev. ALH/RJE/JAL
10/2017
NAZATON SERIES
The Nazaton series consists of very deep, well drained soils that formed in loess and material weathered from granitic rocks. They are on backslopes of mountains and canyons. Permeability is moderately rapid. Slopes are 20 to 90 percent. The average annual precipitation is about 26 inches and the average annual temperature is about 43 degrees F.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Pachic Haplocryolls
TYPICAL PEDON: Nazaton gravelly loam, woodland. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 2 inches; fresh and partially decomposed needles and twigs; moderately acid (pH 6.0).
Oa--2 to 3 inches; well decomposed organic litters, slightly acid (pH 6.2).
A1--3 to 6 inches; dark grayish brown (10YR 4/2) gravelly loam, very dark brown (10YR 2/2) moist; moderate very fine and fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine to coarse roots; many fine interstitial pores; few pebbles and cobblestones; slightly acid (pH 6.4); abrupt smooth boundary. (2 to 5 inches thick)
A2--6 to 23 inches; brown (10YR 4/3) gravelly loam, dark brown (7.5YR 3/3) moist; weak fine and medium subangular blocky and weak fine and medium granular structure; soft, very friable, nonsticky and nonplastic; common very fine and fine, and few medium and coarse roots; many fine interstitial pores; 30 percent gravel, 5 percent cobblestones; slightly acid (pH 6.4); abrupt smooth boundary. (10 to 20 inches thick)
AB--23 to 38 inches; brown (10YR 5/3) very gravelly loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine to coarse roots; common very fine and fine tubular pores; 40 percent gravel, 10 percent cobblestones; neutral (pH 6.6); gradual smooth boundary. (10 to 20 inches thick)
Bw1--38 to 49 inches; light yellowish brown (10YR 6/4) very gravelly loam, dark yellowish brown (10YR 4/4) moist; weak medium and coarse subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine to medium roots; common fine tubular pores; 50 percent gravel, 10 percent cobblestones; neutral (pH 6.8); clear wavy boundary. (5 to 15 inches thick)
Bw2--49 to 53 inches; light brown (7.5YR 6/4) very gravelly sandy loam, brown (7.5YR 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; few fine and medium roots; few fine tubular pores; 50 percent gravel, 10 percent cobblestones; neutral (pH 7.0); clear wavy boundary. (0 to 15 inches thick)
C--53 to 71 inches; light yellowish brown (10YR 6/4) cobbly sandy loam, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, nonsticky and nonplastic; few fine roots; common fine tubular pores; 60 percent gravel, 25 percent cobblestones; neutral (pH 7.0).
TYPE LOCATION: Idaho County, Idaho; 400 feet east of gate in the NE 1/4 SW 1/4 sec. 21, T.7N., R.lE.
RANGE IN CHARACTERISTICS:
Thickness of mollic epipedon - 16 to 40 inches. Particle-size control section - 15 to 25 percent clay, 35 to 60 percent coarse fragments. Average annual soil temperature - 39 to 46 degrees F. Average summer soil temperature - 45 to 47 degrees F. Soil moisture - usually moist, dry in the soil moisture control section for less than 45 consecutive days following the summer solstice. Udic soil moisture regime.
A and AB horizon
Hue - 10YR or 7.5YR.
Value - 4 or 5 dry, 2 or 3 moist.
Chroma - 2 or 3.
Reaction (pH) - moderately or slightly acid.
Bw horizon
Hue - 10YR or 7.5YR.
Value - 5 or 6 dry, 3 or 4 moist.
Chroma - 3 or 4.
Texture - GRV-L, GRV-SL, CBV-L - 15 to 25 percent clay.
Coarse fragments - 35 to 60 percent.
Reaction (pH) - slightly acid or neutral.
COMPETING SERIES: These are the
Baconcamp,
Beehunt, Benhanco,
Behanin,
Belsac (T),
Bullrey,
Busterback,
Caballo,
Croesus,
Dressel,
Gateview,
Hapgood,
Harcany,
Hobacker,
Lionhead (T),
Lolon,
Marcetta,
Nagitsy,
Namela,
Nevtah,
Papaspila,
Parkcity,
Poleline,
Povey,
Snag,
Snopoc,
Splitbutte,
Tonigut, and
Warshod series. Baconcamp and Splitbutte soils are 20 to 40 inches deep to a lithic contact. Beehunt, Busterback, soils have a xeric moisture regime.
Behanco and Dressel soils have an albic horizon. Behanin and Marcetta soils have an E horizon. Belsac, Croesus, Namela, Nevtah, and Nagitsy soils are less than 40 inches deep to bedrock. Belsac, Gateview, Hapgood, Harcany, and Lolon soils lack Bw horizons. Belsac, Caballo, Hobacker, Lionhead, and
Mundos soils have secondary carbonates. Bullrey, Poleline, and Povey soils lack an O horizon. Papaspila soils have more than 35 percent andesite, diorite, rhyolite, tuff, basalt, and breccia fragments in the particle-size control section. Parkcity soils have more than 35 percent limestone, quartzite and sandstone fragments in the particle-size control section. Snag soils have a pH of 5.5 to 6.2 throughout and have a summer soil temperature of 60 to 62 degrees F. Snopoc soils are dominated by coarse sand fraction in the textural control section and have 60 to 80 percent rock fragments in the lower part of the control section. Tonigut soils have identifiable secondary carbonates in the lower part of the particle-size control section and a paralithic contact within 60 inches of the mineral soil surface. Warshod soils have a xeric moisture regime and a paralithic contact within 60 inches of the mineral soil surface.
GEOGRAPHIC SETTING: Nazaton soils are dominately on north-facing slopes of canyons and mountains with slopes of 20 to 90 percent. They formed in loess mixed with colluvium and residuum from granitic rocks. Elevations are 2,400 to 7,600 feet. The average annual precipitation is 24 to 30 inches. The average January temperature is about 16 degrees F.; average July temperature is about 60 degrees F. The average annual temperature is about 38 to 44 degrees F. The frost-free season is 45 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Brower, Olan,
Spokel,
Naz, and
Suttler soils. Brower, Olan, and Spokel soils have an average annual temperature above 47 degrees F. Suttler soils lack mollic epipedons and are coarse-loamy. Naz soils lack more than 35 percent rock fragments in the 10 to 40 inch section.
DRAINAGE AND PERMEABILITY: Well drained; rapid or very rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Used mainly for production of timber, grazeable woodland, and wildlife habitat. Natural vegetation is mainly Douglas-fir, ponderosa pine, snowberry, brome grass, and low Oregon-grape.
DISTRIBUTION AND EXTENT: Central and southwestern Idaho. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Idaho County, Idaho, 1976.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Organic surface - 0 to 3 inches (Oi and Oa horizons)
Mollic epipedon - 3 to 38 inches (A1, A2, and AB horizons)
Cambic horizon - 38 to 53 inches (Bw1 and Bw2 horizons)
Udic moisture regime
National Cooperative Soil Survey
U.S.A.