LOCATION LEALANDIC               NV

Established Series
Rev. JAR/RLB
11/2015

LEALANDIC SERIES

The Lealandic series consists of moderately deep over a duripan, well drained soils that formed in mixed alluvium from mainly limestone, quartzite, and siltstone sources. The Lealandic soils are on alluvial fan piedmonts and have gradients of 2 to 15 percent. The mean annual precipitation is about 7 inches and the mean annual temperature is about 63 degrees F.

TAXONOMIC CLASS: Clayey-skeletal, smectitic, thermic Typic Argidurids

TYPICAL PEDON: Lealandic very gravelly sandy loam, rangeland. (Colors are for dry soils unless otherwise noted.) Typically, 35 percent of the soil surface is covered with pebbles, 5 percent with cobbles and 2 percent with stones.

A--0 to 5 inches; brown (10YR 5/3) very gravelly sandy loam, dark brown (10YR 4/3) moist; moderate very fine and fine platy structure; soft, very friable, slightly sticky and slightly plastic; many very fine, few fine and medium roots; many very fine vesicular and common very fine tubular pores; 40 percent pebbles; slightly effervescent; moderately alkaline (pH 8.4), gradual smooth boundary (2 to 5 inches thick).

Bt--5 to 12 inches; dark yellowish brown (10YR 4/6) gravelly sandy clay, dark yellowish brown (10YR 3/6) moist; strong fine and medium subangular blocky structure; hard, firm, sticky and plastic; many fine and medium, few very fine and coarse roots; many very fine tubular and irregular pores; many pressure faces on peds; 30 percent pebbles; moderately alkaline (pH 8.2), gradual smooth boundary (2 to 9 inches thick).

Btk--12 to 23 inches; yellowish brown (10YR 5/6) very gravelly sandy clay, dark yellowish brown (10YR 4/6) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, sticky and plastic; many very fine roots; many very fine tubular and few very fine irregular pores; common moderately thick pressure faces on peds; 50 percent pebbles; few fine soft lime masses and threads; strongly effervescent; moderately alkaline (pH 8.4), abrupt wavy boundary (10 to 20 inches thick).

Bqkm--23 to 40 inches; white (10YR 8/2) indurated duripan, light gray (10YR 7/2) moist; massive; extremely hard, extremely firm; silica-lime cemented laminar cap 2 to 15 mm thick; violently effervescent.

TYPE LOCATION: Nye County, Nevada; 1 mile south of Highway 58, National Monument border along east gravel road. 2,600 feet east, 1,800 feet north of southwest corner of section 7, T. 13 S., R. 46 E., MDBM.

RANGE IN CHARACTERISTICS:

Soil moisture: Usually dry, but moist in some part of the moisture control section in January, February and March. Moist in some part for 10 to 20 days following summer convection storms.

Soil temperature: 62 to 67 degrees F.

Depth to duripan: 20 to 40 inches.


Control section - Rock fragments: 35 to 60 percent, mainly pebble.

Clay content: 35 to 50 percent.

Reaction: Moderately alkaline or strongly alkaline.


A horizon Value: 5 or 6 dry, 3 through 5 moist.

Chroma: 3 or 4.


Bt & Btk horizon - Hue: 10YR, 7.5YR or 5YR.

Value: 4 or 5 dry, 3 or 4 moist.

Chroma: 4 through 6.

Texture: Gravelly sandy clay or very gravelly sandy clay. with secondary accumulation of lime and silica.

Other features: Some pedons have subhorizon of the argillic with textures that range from very gravelly sandy clay loam or very gravelly loam with accumulation of secondary silica and lime

Bqkm horizon - Rupture resistance: Very strongly cemented to indurated.

COMPETING SERIES: There are no competing series. Frye soils are similar but contain less than 35 percent rock fragments in the control section.

GEOGRAPHIC SETTING: Lealandic soils are on alluvial fan remnants. The soils formed in mixed alluvium, predominantly from limestone and quartzite sources. Slopes are 2 to 15 percent. Elevation ranges from 2,000 to 4,000 feet. The climate is warm and arid. The mean annual precipitation ranges from 3 to 9 inches. The mean annual temperature is between 60 and 65 degrees F. The frost-free season is 190 to 210 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Canutio, Longjim, and Pinez soils. Canutio soils are formed in recent alluvium, lack argillic horizons, or duripans, and have a loamy-skeletal control section. The Longjim soil lacks an argillic horizon and is generally on convex, steeper sites above the Lealandic series. Pinez soils are on mid-fan remnants and have loamy-skeletal control sections.

DRAINAGE AND PERMEABILITY: Well drained; runoff is medium; permeability is slow.

USE AND VEGETATION: Rangeland. The present vegetation is mainly ephedra, buckwheat, cheatgrass and rabbitbrush.

DISTRIBUTION AND EXTENT: Southwest Nevada. These soils are inextensive. MLRA 30.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA

SERIES PROPOSED: Nye County, Nevada, Southwest part, 1981. The name is coined.

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

Argillic horizon - The zone from about 5 to 23 inches (Bt and Btk horizons).

Duripan - The zone from about 23 to 40 inches (Bqkm).

Textural control section - The zone from about 5 to 23 inches (Bt and Btk horizons).

Responsibility for this series was transferred from Davis to Phoenix 11/2015. The last revision to the series was 5/1997. ET

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National Cooperative Soil Survey
U.S.A.