LOCATION EDNAGREY NV
Established Series
LJL/ET/TM
04/2015
EDNAGREY SERIES
The Ednagrey series consists of very shallow, well drained soils that formed in residuum and colluvium from limestone. Ednagrey soils are on backslopes mountains. Slope ranges from 30 to 75 percent. The mean annual precipitation is about 13 inches and the mean annual air temperature is about 48 degrees F.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, calcareous, mesic Lithic Ustic Torriorthents
TYPICAL PEDON: Ednagrey extremely gravelly fine sandy loam, rangeland and wildlife habitat. (Colors are for dry soil unless otherwise noted.) The soil surface is covered by approximately 70 percent pebbles, 4 percent cobbles and 0.5 percent stones.
A--0 to 2 inches; pale brown (10YR6/3) extremely gravelly fine sandy loam, brown (10YR 4/3) moist; moderate very thick platy structure; moderately hard, very friable, slightly sticky and slightly plastic; few very fine roots; many very fine and common fine tubular pores; 60 percent pebbles and 4 percent cobbles; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (1 to 2 inches thick)
Bk--2 to 8 inches; pale brown (10YR6/3) very gravelly fine sandy loam, brown (10YR 4/3) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and common fine tubular pores; 80 percent, continuous, distinct, white (10YR8/1) calcium carbonate coats on bottom of rock fragments; 40 percent pebbles and 1 percent cobbles; violently effervescent; moderately alkaline (pH 8.4); very abrupt wavy boundary. (3 to 8 inches thick)
R--8 inches; very hard limestone.
TYPE LOCATION: Clark County, Nevada; about 14.5 miles north and 5 miles east of Pahrump, Nevada; approximately 4.1 miles east and 2.3 mile south of Mount Stirling; tentatively sectionalized area 1,060 feet south and 1980 feet west of the northeast corner of section 3, T. 18 S., R. 54 E.; USGS Mt. Stirling, NV 7.5 minute topographic quadrangle; 36 degrees, 25 minutes, 13.9 seconds north latitude and 115 degrees, 53 minutes, 40.6 seconds west longitude; UTM 11s, 0599098e, 4031161n; NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture usually dry, moist in late winter and early spring and intermittently moist in the upper part following summer thunderstorms. Aridic bordering ustic soil moisture regime.
Soil temperature: 47 to 52 degrees F.
Depth to lithic contact: 4 to 10 inches.
Control section - Rock fragments: 35 to 70 percent, mainly gravel.
Clay content: 7 to 15 percent.
A horizon - Value: 3 or 4 moist.
Chroma: 3 or 4.
Structure: Subangular blocky structure or platy.
Consistence: Soft through moderately hard, nonsticky or slightly sticky, nonplastic or slightly plastic.
Organic matter: 0.25 to 0.75 percent.
Bk horizon - Chroma: 3 or 4.
Structure: Weak or fine.
Consistence: Nonsticky or slightly sticky, nonplastic or slightly plastic.
Organic matter: 0 to 0.5 percent.
COMPETING SERIES: These are the
Andanada (NM),
Daklos (UT),
Hillburn (UT),
Meriwhitica (AZ),
Nonip (UT),
Redsun (WY),
Reef (UT),
Skos (UT),
Sunup (WY),
Teesto (AZ) and
Windcomb series. Andanada soils have 18 to 27 percent clay in the particle-size control section and a mean annual soil temperature of 52 to 54 degrees F. Daklos soils do not have visible secondary calcium carbonate. Hillburn soils have 18 to 27 percent clay in the particle-size control section. Meriwhitica soils have a mean annual soil temperature of 54 to 58 degrees F. Nonipsoils have 18 to 27 percent clay in the particle-size control section. Redsun soils have hues of 7.5YR or 2.5YR. Reef soils have hues of 7.5YR or 5YR. Skos soils have hues of 5YR or 2.5YR and 20 to 35 percent clay in the particle-size control section. Sunup soils have hues of 7.5YR or 5YR and 18 to 35 percent clay in the particle-size control section. Teesto soils have a mean annual soil temperature of 52 to 56 degrees F. and averages 18 to 25 percent clay in the particle-size control section. Windcomb soils have hues of 5YR or 2.5YR. In addition, Hillburn, Nonip, Reef, Skos, and Windcomb soils do not have visible secondary calcium carbonates.
GEOGRAPHIC SETTING: Ednagrey soils are on backslopes of mountains. Slope ranges range from 30 to 75 percent. These soils formed in residuum and colluvium from limestone. Elevations are 6,900 to 8,200 feet. The climate is sub-humid continental, cool, with moist winters and occasional summer thundershowers. The mean annual precipitation is 12 to 14 inches; mean annual air temperature is 45 to 50 degrees F., and the frost-free season is 90 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are
Devilsthumb and
Seralin soils. Devilsthumb soils are moderately deep to bedrock and have a frigid soil temperature regime. The Seralin soils have a mollic epipedon.
DRAINAGE AND PERMEABILITY: Well drained; very high runoff; moderately rapid permeability.
USE AND VEGETATION: These soils are used for rangeland and wildlife habitat. The present vegetation is mainly littleleaf mountainmahogany, singleleaf pinyon, Utah juniper, curlleaf mountainmahogany and green ephedra.
DISTRIBUTION AND EXTENT: Mojave Desert of southern Nevada; MLRA 30. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA
SERIES ESTABLISHED: Clark County Area, Nevada, 2006. Proposed in Clark County, Nevada; Clark County Soil Survey, 2003. The name is from Edna Grey Spring located in the Spring Mountains.
REMARKS: Diagnostic horizons and features recognized in the profile are:
Ochric epipedon - 0 to 7 inches (A and part of the Bk horizon).
Calcic horizon 2 to 8 inches (Bk horizon).
Lithic contact - 8 inches (R horizon).
Particle-size control section - 0 to 8 inches (A and Bk horizons).
Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 7/2006. ET
National Cooperative Soil Survey
U.S.A.