LOCATION YBAR                    NM+TX

Established Series
Rev GWC
07/2012

YBAR SERIES

The Ybar series consists of very deep, well drained soils that formed in clayey alluvium. Ybarsoils are on toeslopes of fan piedmonts and fan remnants. Slopes range from 0 to 30 percent. The mean annual precipitation is about 9 inches and the mean annual air temperature is about 64 degrees F.

TAXONOMIC CLASS: Fine, mixed, superactive, thermic Typic Haplogypsids

TYPICAL PEDON: Ybar silty clay loam rangeland. (Colors are for dry soil unless otherwise noted)

A--0 to 4 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/3) moist; 30 percent clay; moderate thick platy over moderate medium subangular blocky structure; friable, slightly hard, moderately sticky and very plastic; common very fine and fine roots throughout; common very fine pores; carbonate finely disseminated, 14 percent calcium carbonate equivalent; violently effervescent; gypsum finely disseminated, 9 percent gypsum; strongly saline, EC of 37 dS/m; neutral (pH 7.1); gradual wavy boundary. (1 to 4 inches thick)

Bk--4 to 14 inches; brown (7.5YR 5/4) silty clay loam, brown (7.5YR 4/3) moist; 30 percent clay; moderate medium subangular blocky structure; firm, hard, moderately sticky and very plastic; common fine, coarse and very coarse roots throughout; common very fine pores; 4 percent fine carbonate masses throughout, 14 percent calcium carbonate equivalent, violently effervescent; gypsum finely disseminated, 8 percent gypsum; strongly saline; EC of 23 dS/m; neutral (pH 7.2); diffuse wavy boundary. (10 to 38 inches thick)

Bky1--14 to 30 inches; brown (7.5YR 5/4) silty clay, brown (7.5YR 4/4) moist; 50 percent clay; moderate medium and coarse subangular blocky structure; firm, hard, moderately sticky and very plastic; common fine roots throughout; common very fine and fine pores; 4 percent fine irregular carbonate masses throughout, 14 percent calcium carbonate equivalent, strongly effervescent; 5 percent fine irregular gypsum nests throughout, 14 percent gypsum; moderately saline, EC of 15 dS/m; slightly alkaline (pH 7.4); diffuse wavy boundary.

Bky2--30 to 47 inches; brown (7.5YR 5/4) silty clay, brown (7.5YR 4/4) moist; 45 percent clay; moderate medium and coarse subangular blocky structure; firm, hard, moderately sticky and very plastic; common very fine and fine pores; 4 percent fine irregular carbonate masses throughout, 14 percent calcium carbonate equivalent, strongly effervescent; 5 percent fine and 10 percent medium gypsum nests throughout, 14 percent gypsum; moderately saline, EC of 13 dS/m; slightly alkaline (pH 7.4); diffuse wavy boundary.

Bky3--47 to 67 inches; brown (7.5YR 5/4) silty clay, brown (7.5YR 4/3) moist; 42 percent clay; moderate medium subangular blocky structure; firm, hard, moderately sticky and very plastic; common very fine pores; 2 percent fine carbonate masses throughout, 10 percent calcium carbonate equivalent, strongly effervescent; 15 percent fine gypsum nests throughout 13 percent gypsum; moderately saline, EC of 13 dS/m; slightly alkaline (pH 7.4); diffuse wavy boundary.

Bky4--67 to 79 inches; brown (7.5YR 5/4) clay loam, brown (7.5YR 4/3) moist; 37 percent clay; moderate medium subangular blocky structure; firm, hard, moderately sticky and very plastic; common very fine pores; 2 percent fine irregular carbonate masses throughout, 9 percent calcium carbonate equivalent, strongly effervescent; 5 percent fine irregular gypsum nests throughout, 5 percent coarse gypsum crystals throughout, 12 percent gypsum; strongly saline, EC of 19 dS/m; neutral (pH 7.3). (Combined thickness of the Bky horizons is 24 to 60 inches)

TYPE LOCATION: Sierra County, New Mexico. Approximately 2.19 miles north and 1.3 miles east of the intersection of Range Roads 6 and 7, Rhodes Canyon; USGS Quad Lumley Lake NW. Latitude: 33 degrees 12 minutes 6.8 seconds north, Longitude: 106 degrees 28 minutes 16.3 seconds west, NAD 83; UTM Easting: 363259 meters, UTM Northing: 3673566 meters. UTM zone 13.

RANGE IN CHARACTERISTICS:

Soil moisture: Typic aridic soil moisture regime. The moisture control section is usually dry all in parts more than three-fourths of the time that the soil temperature exceeds 41 degrees F. at 20 inches.

Mean annual soil temperature: 62 to 66 degrees F.

Particle-size control section (weighted average)
Clay content: 35 to 60 percent
Calcium carbonate equivalent: 1 to 20 percent
Gypsum content: 5 to 20 percent
Reaction: neutral to moderately alkaline

A horizon
Hue: 7.5YR, 10YR, 5YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 3 to 6, dry or moist
Texture: silty clay loam, silty clay, silt loam, clay
Clay content: 18 to 50 percent
Calcium carbonate equivalent: 10 to 20 percent disseminated carbonates
Gypsum content: 5 to 15 percent disseminated gypsum
Electrical conductivity: 16 to 50 dS/m

Bk horizon
Hue: 7.5YR, 10YR
Value: 4 to 6 dry, 3 to 5 moist
Chroma: 3 to 6, dry or moist
Texture: silty clay, silty clay loam
Clay content: 27 to 50 percent, averages greater than 35 percent clay
Calcium carbonate equivalent: 10 to 20 percent, averages less than 15 percent
Gypsum content: 5 to 15 percent
Electrical conductivity: 16 to 30 dS/m

Bky horizon
Hue: 7.5YR, 10YR, 5YR
Value: 4 to 7 dry, 3 to 6 moist
Chroma: 2 to 6, dry or moist
Texture: silty clay, silty clay loam, clay loam, clay
Clay content: 27 to 60 percent, averages greater than 35 percent clay
Calcium carbonate equivalent: 5 to 20 percent, averages less than 15 percent
Gypsum content: 10 to 20 percent
Electrical conductivity: 8 to 30 dS/m

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Ybar soils are on toeslopes of fan piedmonts and fan remnants. Slope is 0 to 30 percent. These soils formed in clayey alluvium. Elevation ranges from 3,000 to 4,150 feet. The mean annual precipitation is 8 to 11 inches. Precipitation falls mostly during the months of July through September. The mean annual air temperature is 62 to 67 degrees F. The frost-free period is 200 to 250 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bigsalt(T)(NM), Aerobee(T)(NM),and Mimbres (NM), series. Mimbres soils are on fan piedmonts and inset fans and have a fine-silty particle-size control section. Bigsalt soils are on floodplains and have a salic horizon. Aerobee soils are on basin floors and have a fine-loamy control section.

DRAINAGE AND PERMEABILITY: well drained; medium runoff; slow permeability.

USE AND VEGETATION: The major uses are military exercises and wildlife habitat. Native vegetation is alkali sacaton, fourwing saltbush and desert seepweed.

DISTRIBUTION AND EXTENT: South central New Mexico, limited to the Tularosa Basin. MLRA 42. Ybar is of limited extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona

SERIES ESTABLISHED: Hudspeth County, Texas; Soil Survey of Hudspeth County, Texas (Main Part), 2012. The series name Ybar is derived from the established soil series Ubar with a gypsum "y" horizon suffix designation replacing the "U"

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

Particle-size control section - the zone from 10 to 40 inches (Bk, Bky1, Bky2 horizons)

Ochric epipedon - the zone from 0 to 4 inches (A horizon)

Gypsic horizon - the zone from 14 to 79 inches (Bky1, Bky2, Bky3, and Bky4 horizons)

Classified according to Soil Taxonomy, Second Edition, 1999; Keys to Soil Taxonomy, Eleventh Edition, 2010

Revised for the correlation of Hudspeth County, Texas (Main Part) and Culberson County, Texas (Main Part); July, 2012, NMS

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National Cooperative Soil Survey
U.S.A.