LOCATION HARCANY NV+OREstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Pachic Haplocryolls
TYPICAL PEDON: Harcany stony silt loam, rangeland. (Colors are for dry soil unless otherwise noted.)
A1--0 to 4 inches; dark grayish brown (10YR 4/2) stony silt loam, very dark brown (10YR 2/2) moist; strong very fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and few fine and medium roots; many very fine interstitial pores; 25 percent pebbles, 5 percent cobbles and 1 percent stones; neutral (pH 6.6); clear wavy boundary. (3 to 6 inches)
A2--4 to 10 inches; dark grayish brown (10YR 4/2) gravelly silt loam, very dark brown (10YR 2/2) moist; moderate very fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and few fine and medium roots; many very fine interstitial pores; 25 percent pebbles, 5 percent cobbles and stones; neutral (pH 6.6); clear wavy boundary. (4 to 8 inches thick)
A3--10 to 18 inches; dark grayish brown (10YR 4/2) very gravelly silt loam, very dark brown (10YR 2/2) moist; massive; slightly hard, very friable, nonsticky and nonplastic; common very fine and few fine and medium roots; many very fine interstitial pores; 40 percent pebbles, 15 percent cobbles and stones; neutral (pH 6.6); clear wavy boundary. (6 to 10 inches thick)
2A4--18 to 48 inches; brown (10YR 5/3) extremely gravelly sandy loam, dark brown (10YR 3/3) moist; massive; hard, friable, slightly sticky and slightly plastic; common very fine and few fine and medium roots; common very fine interstitial and few very fine tubular pores; 60 percent pebbles, 5 percent cobbles and stones; neutral (pH 6.8); clear wavy boundary. (20 to 36 inches thick)
2A5--48 to 72 inches; brown (10YR 5/3) extremely gravelly sandy loam, dark brown (10YR 3/3) moist; massive; hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine interstitial and few very fine tubular pores; 50 percent pebbles, 20 percent cobbles and stones; neutral (pH 6.8).
TYPE LOCATION: Humboldt County, Nevada; approximately 6 miles southeast of Winnemucca, about 500 feet west and 900 feet north of the southeast corner of section 13, T. 35 N., R. 38 E; 40 degrees, 54 minutes, 12 seconds north latitude and 117 degrees, 38 minutes, 36 seconds west longitude.
RANGE IN CHARACTERISTICS:
Soil moisture - Usually moist, moist in winter through early summer, dry from August through September.
Soil temperature - 36 to 43 degrees F.
Average summer soil temperature - 54 to 59 degrees F.
Mollic epipedon thickness - 30 to 70 inches.
Control section - Clay content: 10 to 20 percent but the average is less than 18 percent.
Rock fragments: 50 to 80 percent, mainly pebbles.
A horizon - Value: 3 through 5 dry, 2 or 3 moist.
Chroma: 2 or 3.
2A horizon - Value: 5 or 6 dry.
Texture: Extremely gravelly sandy loam, very gravelly silt loam, extremely stony or extremely cobbly loam with strata of gravelly loam or gravelly silt loam.
Rock fragments: 60 to 80 percent.
COMPETING SERIES: These are the Behanin(UT), Belsac(NV), Blanca(NM), Busterback(T ID), Caballo(NM), Campone(CA), Croesus(NV), Darland(WA), Dateman(UT), Gateview(CO), Hapgood(NV), Hobacker(WY), Lionhead(ID), Lolon(MT), Marcetta(MT), Nagitsy(ID), Namela(CO), Nazaton(ID), Nevtah(NV), Papaspila(T CO), Poleline(UT), Povey(ID), Prong(OR), Snag(CA), Snopoc(NV), Spearhead(WY) and Splitbutte(ID) series. Behanin soils have cambic horizons, are medium or slightly acid and have 18 to 25 percent clay in the particle-size control section. Blanca soils are slightly or medium acid. Busterback soils have mollic epipedons 20 to 30 inches thick and summer so8l temperature of 44 to 49 degrees F. Caballo soils have cambic horizons and have 18 to 35 percent clay in the particle-size control section, Campone soils are slightly or medium acid and more than 18 percent clay in the particle-size control section. Belsac, Croesus, Dateman, Nagitsy, Namela, Nevtah, Prong and Splitbutte soils have bedrock at depths of 20 to 40 inches. Gateway soils have very gravelly sandy loam textures in the upper part of the particle-size control section and have uniformly calcareous materials at depths of 16 to 40 inches. Hapgood soils contain 18 to 25 percent clay in the particle-size control section. Hobacker soils have visible carbonates and very gravelly loamy sand textures in the series control section. Lolon soils have mollic epipedons 16 to 24 inches thick and unconformable sand and pebbles in the series control section. Lionhead soils have cambic horizons and secondary carbonates below. Lorta soils have cambic horizons and bedrock at a depth of 40 to 60 inches. Marcetta soils have mollic epipedons 16 to 30 inches thick, albic horizons and eluvial clays in the series control section. Nazaton soils have cambic horizons. Papaspila soils contain 18 to 35 percent clay. Poleline and Povey soils have cambic horizons and bedrock at depths of 40 to 60 inches. Snag soils are medium or slightly acid and have mollic epipedons 20 to 29 inches thick and bedrock at depths of 40 to 60 inches. Snopoc soils have a mollic epipedon that is 16 to 25 inches thick. Spearhead soils are calcareous in the series control section.
GEOGRAPHIC SETTING: Harcany soils are on side slopes of mountains. These soils formed in colluvium weathered from mixed rocks sources with additions of loess and volcanic ash. Slopes are 2 to 75 percent. Elevations are 6,000 to 9,000 feet. The climate is cool, semiarid with cold, moist winters and cool, dry summers. The mean annual precipitation is 12 to 20 inches; mean annual temperature is 35 to 45 degrees F., and the frost-free season is 45 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Golsum and Spinlin soils. Both of these soils have clayey-skeletal family control sections. Golsum soils also have a frigid temperature regime.
DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; moderate permeability.
USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly mountain big sagebrush, snowberry, mountain brome, and Idaho fescue.
DISTRIBUTION AND EXTENT: North-central Nevada and southeastern Oregon. These soils are of moderate extent. MLRA 23, 24.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Humboldt County, Nevada, (BLM Sonoma Planning Unit). 1974.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to over 48 inches.
Particle-size control section - The zone from 10 to 40 inches.