LOCATION LONGJIM                 NV

Established Series
Rev. HJB/WED/RLB
09/2015

LONGJIM SERIES

The Longjim series consists of shallow over duripan, well drained soils that formed in alluvium from mixed rock sources. The Longjim soils are on fan piedmont remnants. Slopes are 2 to 15 percent. The mean annual precipitation is about 8 inches and the mean annual temperature is about 60 degrees F.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, thermic, shallow Typic Haplodurids

TYPICAL PEDON: Longjim gravelly fine sandy loam, rangeland. (Colors are for dry soil unless otherwise noted.) Typically, 50 percent of the soil surface is covered with pebbles and 5 percent with cobbles.

A--0 to 3 inches; light brownish gray (10YR 6/2) gravelly fine sandy loam, dark yellowish brown (10YR 4/4) moist; weak thick platy structure; slightly hard, very friable, slightly sticky and slightly plastic; many fine and common medium vesicular pores; 30 percent pebbles; strongly effervescent; moderately alkaline (pH 8.2); abrupt smooth boundary. (1 to 6 inches thick)

Bw--3 to 8 inches; light yellowish brown (10YR 6/4) gravelly loam, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine and fine, few medium roots; many very fine interstitial and few fine tubular pores; 20 percent pebbles; strongly effervescent; strongly alkaline (pH 8.8); clear smooth boundary. (0 to 8 inches thick)

Bk--8 to 16 inches; very pale brown (10YR 7/3) very gravelly sandy loam, light yellowish brown (10YR 6/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; common very fine and few fine roots; many very fine interstitial and few fine tubular pores; 50 percent pebbles, most pebbles are lime coated; few weakly or strongly silica and lime cemented peds; violently effervescent; strongly alkaline (pH 8.6); abrupt wavy boundary. (6 to 15 inches thick)

Bqkm--16 to 45 inches; white (10YR 8/1) strongly and weakly silica-lime cemented hardpan, light gray (10YR 7/2) moist; white (10YR 8/2) dry and light yellowish brown (10YR 6/4) moist; with indurated cap, the pan is indurated in the upper 2 to 4 inches; strongly and weakly cemented below; A few fine and medium roots are between plates. Rock fragment content range from 40 to 60 percent.

TYPE LOCATION: Nye County, Nevada; 1,500 feet south and 400 feet west of the northeast corner of section 33, T. 19 S., R. 54 E.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually dry, Moist for short periods of time in the late winter.

Soil temperature - 62 to 67 degrees F.

Depth to duripan - 14 to 20 inches.


Control section - Clay content: 5 to 10 percent.

Rock fragments: 35 to 70 percent, mainly pebbles. with a few 0 to 10 percent cobbles


A horizon - Value: 6 or 7 dry, 4 or 5 moist.

Chroma: 2 through 4.


Bw and Bk horizons - Hue: 10YR or 7.5YR.

Value: 6 through 8 dry, 4 through 6 moist.

Chroma: 3 or 4.

Texture of the fine earth: Fine sandy loam, sandy loam or coarse sandy loam.

Consistence: Soft and slightly hard.


Bqkm horizons - Value: 6 through 8 dry.

Rock fragments: 40 to 60 percent mainly pebbles with 0 to 15 percent cobbles.

Rupture resistance: Continuous cap or common continuous silica laminae in upper 6 inches. Commonly layered, with weakly and strongly cemented layers and indurated plates.

COMPETING SERIES: This is the Cline(T AZ), Crosgrain(T NV), Greyeagle(CA), and Tumarion(T AZ) series. Cline and Tumarion soils have a lithic contact immediately below the duripan. Crosgrain soils are 7 to 14 inches to the duripan and have 10 to 18 percent clay in the control section. Greyeagle soils have duripans at depths less than 14 inches and average 10 to 18 percent clay in the control section.

GEOGRAPHIC SETTING: Longjim soils are on fan piedmont remnants. The soils formed in mixed alluvium. Slopes are 2 to 15 percent. Elevation is 3,300 to 4,500 feet. The climate is warm and arid. The mean annual precipitation is 6 to 10 inches. The mean annual temperature is 60 to 65 degrees F. The frost-free season is about 210 to 250 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Alko, Arizo and Canutio soils. The Alko soil are on similar topography to the Longjim soil but is less than 14 inches deep to the duripan. Arizo and Canutio soils are in the drainageways and are very deep and subject to flooding.

DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability above the duripan.

USE AND VEGETATION: Livestock grazing and wildlife habitat. The vegetation is mainly blackbrush, Nevada ephedra and Anderson wolfberry with small amounts of Indian ricegrass, bush muhly and big galleta.

DISTRIBUTION AND EXTENT: Southern Nevada. The soils are of small extent. MLRA 30.

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

SERIES ESTABLISHED: Lincoln County, Nevada, South Part, 1992.

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

Duripan - The zone from 16 to 45 inches.

Particle-size control section - The zone from 10 to 16 inches.

Responsibility for this series was transferred from Davis to Phoenix 9/2015. The last revision to the series was 5/1997. ET

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National Cooperative Soil Survey
U.S.A.