LOCATION NONAMEWASH              NV

Established Series
DJM/LJL/TM
12/2015

NONAMEWASH SERIES

The Nonamewash series consists of very deep, well drained soils that formed in mixed alluvium. Nonamewash soils are on stream terraces. Slope ranges from 0 to 4 percent. The mean annual precipitation is about 5 inches and the mean annual temperature is about 73 degrees F.

TAXONOMIC CLASS: Sandy, mixed, hyperthermic Typic Torrifluvents

TYPICAL PEDON: Nonamewash loamy fine sand, rangeland and wildlife habitat. (Colors are for dry soil unless otherwise noted.)

A1--0 to 3 inches; pale brown (10YR 6/3) loamy fine sand, brown (10YR 4/3) moist; moderate medium platy structure; soft, very friable, nonsticky and nonplastic; many very fine roots; common very fine interstitial and few very fine through medium tubular pores; slightly effervescent; moderately alkaline (pH 8.0); abrupt wavy boundary.

A2--3 to 8 inches; brown (10YR 5/3) loamy fine sand, dark brown (10YR 3/3) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine and few fine roots; few very fine interstitial and very fine and fine tubular pores; slightly effervescent; moderately alkaline (pH 8.4); clear wavy boundary. (Combined thickness of the A horizons is 3 to 10 inches.)

By1--8 to 50 inches; pale brown (10YR 6/3) stratified loamy fine sand to fine sand with some thin strata of very fine sandy loam, brown (10YR 4/3) moist; many fine and medium distinct brownish yellow (10YR 6/6) and prominent reddish yellow (7.5YR 6/6) relic iron stains; massive; soft, very friable, nonsticky and nonplastic; common very fine and few fine and medium roots; few very fine and fine tubular pores; few fine irregular soft filaments and soft masses of gypsum; slightly through violently effervescent; strongly alkaline (pH 8.6); clear smooth boundary.

By2--50 to 60 inches; pale brown (10YR 6/3) fine sand, brown (10YR 4/3) moist; common fine distinct reddish yellow (7.5YR 6/6) relic iron stains; massive; soft, very friable, nonsticky and nonplastic; few very fine and fine roots; few very fine and fine tubular pores; few fine soft masses of gypsum; slightly effervescent; strongly alkaline (pH 8.6). (Combined thickness of the By horizons is 40 to 60 inches.)

TYPE LOCATION: Clark County, Nevada; approximately 1.5 miles southeast of the junction of the Needles Highway and the dirt road that follows the Colorado River along the Big Bend and 1/2 mile due south of Big Bend, Arizona; about 1,650 feet north and 400 feet west of the southeast corner of section 9, T. 33 S., R. 66 E.; 35 degrees, 5 minutes, 5 seconds north latitude and 114 degrees, 37 minutes, 33 seconds west longitude. UTM, zone 11, 716442e, 3885016n. NAD83.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually dry, moist in some part for short periods during winter and early spring and for 10 to 20 days cumulative between July to October following convection storms. Has a Typic Aridic moisture regime.


Soil temperature - 72 to 78 degrees F.

Organic matter content: Less than 0.5 percent, decreasing irregularly with depth due to stratification.

Control section - Percent clay: Averagers 5 to 10 percent.
Texture: Stratified sand through silt loam.

A horizon(s) - Value: 5 or 6 dry, 3 or 4 moist.
Chroma: 3 or 4.

By1 horizon - Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 or 4.
Structure: Weak subangular blocky or massive.
Consistence: Slightly hard or soft.
Reaction: Moderately alkaline or strongly alkaline.
Other features: Few fine filaments and soft masses of gypsum.

By2 horizon - Texture: Fine sand or very fine sand.
Effervescence: Very slightly effervescent or slightly effervescent.
Reaction: Moderately alkaline or strongly alkaline
Other features: Few fine filaments and soft masses of gypsum.

COMPETING SERIES: These are the Brios (AZ), Coachella (CA) and Vint (AZ) series. Brios soils have from less than 10 percent to greater than 35 percent pebbles in some pedons and lack gypsum and relict mottles within the control section. Coachella and Vint soils lack gypsum within the control section.

GEOGRAPHIC SETTING: Nonamewash soils are on stream terraces. These soils formed in mixed alluvium. Slope ranges from 0 to 4 percent. Elevations are 500 to 800 feet. The climate is hot and arid with warm, intermittently moist winters and hot, dry summers. The mean annual precipitation is 4 to 6 inches; mean annual air temperature is 71 to 76 degrees F., and the frost-free season is 300 to 360 days.

GEOGRAPHICALLY ASSOCIATED SOILS: This is the Rositas series. The Rositas series are unstratified eolian sand, occuring as sand dunes and sand sheets.

DRAINAGE AND PERMEABILITY: Well drained; very low runoff; moderately rapid permeability.

USE AND VEGETATION: These soils are used for rangeland and wildlife habitat. The present vegetation is mainly cattle saltbush, mesquite and Mediterraneangrass.

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, 1996. The name is coined from a local drainage.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - 0 to 7 inches (A1 and part of the A2 horizons).

Particle-size control section - 10 to 40 inches (Part of the By1 horizon).

Responsibility for this series was transferred from Davis to Phoenix 12/2015. The last revision to the series was 7/2006. ET

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National Cooperative Soil Survey
U.S.A.