LOCATION JONNIC                  NV

Established Series
Rev. HJB/TM/ET
09/2015

JONNIC SERIES

The Jonnic series consists of moderately deep over a duripan, well drained soils that are on fan piedmont remnants. Jonnic soils formed in alluvium from mixed rock sources. Slopes are 4 to 8 percent. The mean annual precipitation is about 8 inches and the mean annual temperature is about 62 degrees F.

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

TYPICAL PEDON: Jonnic gravelly loam, rangeland. (Colors are for dry soil unless otherwise noted.)

A--0 to 2 inches; very pale brown (10YR 7/4) gravelly loam, yellowish brown (10YR 5/4) moist; moderate coarse platy structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine and fine vesicular pores; 25 percent pebbles, 1 percent cobbles, 1 percent stones; violently effervescent; strongly alkaline (pH 8.6); clear wavy boundary. (2 to 4 inches thick)

Btk--2 to 9 inches; reddish yellow (7.5YR 6/6) very gravelly clay loam, strong brown (7.5YR 5/6) moist; weak medium subangular blocky structure; soft, very friable, sticky and plastic; common very fine and few fine roots; common very fine and few fine interstitial pores; few thin clay films lining pores and on faces of peds ; 40 percent pebbles, 2 percent cobbles; few very thin white lime coating on undersides of rock fragments; violently effervescent; strongly alkaline (pH 8.6); clear wavy boundary. (5 to 8 inches thick)

Btqk1--9 to 21 inches; reddish yellow (7.5YR 6/6) very gravelly clay, strong brown (7.5YR 5/6) moist; moderate medium subangular blocky structure; slightly hard, friable, sticky and plastic; few very fine and common fine roots; few very fine tubular pores; 15 percent medium soft lime masses; few faint clay films bridges sand grains; 40 percent pebbles, 3 percent cobbles; few thin lime-silica pendants on undersides of rock fragments; violently effervescent; strongly alkaline (pH 8.6). (7 to 12 inches thick)

Btqk2--21 to 38 inches; reddish yellow (7.5YR 6/6) extremely cobbly sandy clay loam, strong brown (7.5YR 5/6) moist; weak fine subangular blocky structure, soft, very friable, sticky and plastic; few very fine roots; common very fine and few fine interstitial pores; few faint clay films bridging sand grains; 40 percent pebbles, 35 percent cobbles; common thin lime-silica coats on undersides of rock fragments; violently effervescent; strongly alkaline (pH 8.6); clear wavy boundary. (10 to 20 inches thick)

Bqkm--38 to 42 inches; white (10YR 8/1) indurated duripan; massive; extremely hard, and extremely firm; 45 percent pebbles, 5 percent cobbles; thin strata are strongly cemented, very hard and very firm.

TYPE LOCATION: Nye County, Nevada; approximately 1 mile east of Highway 160 near the old mining town of Johnnie and about 1,400 feet south and 200 feet west of the southeast corner of section 6, T. 18 S., R. 53 E., MDBL.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually dry. Moist in the late winter and spring; Xeric Aridic moisture regime.
Soil temperature - 63 to 69 degrees F.
Depth to duripan - 25 to 40 inches.

Control section - Percent clay: 35 to 50 percent, weighted average.
Rock fragments: 35 to 45 percent pebbles, 2 to 5 percent cobbles, 0 to 5 percent stones.

A horizon - Value: 6 or 7 dry; 4 or 5 moist.
Reaction: Moderately alkaline or strongly alkaline.

Btk and Btqk1 horizons - Chroma: 5 or 6 moist or dry.
Texture of fine earth: Clay loam or clay.
Clay content: 35 to 55 percent.
Rock fragments: 35 to 50 percent.

Btqk2 horizon - Texture of fine earth: Sandy clay loam or clay loam.
Clay content: 25 to 35 percent.
Rock fragments: 30 to 40 percent pebbles, 20 to 35 percent cobbles, 0 to 5 percent stones.

Bqkm horizon - Rupture resistance: Very strongly cemented to indurated; subhorizons are strongly cemented in most pedons.

COMPETING SERIES: There are no other soils in this family at the present time.

GEOGRAPHIC SETTING: Jonnic soils are on fan piedmont remnants. The soils formed in alluvium from mostly quartzite sources with some shale and limestone. Slopes are 4 to 8 percent. Elevations are 3,000 to 4,500 feet. The climate is arid with hot dry summers and mild winters. The mean annual precipitation is between 7 and 9 inches; mean annual temperature is between 57 to 64 degrees F., and the frost-free season is about 180 to 220 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Canoto and Arizo soils. Both these soils lack argillic horizons and duripans.

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

USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly blackbrush, creosotebush, ephedra and wolfberry.

DISTRIBUTION AND EXTENT: Southern Nye County, Nevada. These soils are not extensive.

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

SERIES ESTABLISHED: Nye County, Nevada, Southwest Part 1994.

REMARKS: The name is coined from the nearby historical mining town of Johnnie. In 1985 the subgroup was changed from Abruptic to Xerollic based on collected data, in addition, mineralogy was changed from mixed to montmorillonitic.

Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from 0 to 2 inches (A horizon)
Argillic horizon - The zone from about 2 to 38 inches (Bt, Btk1 and Btk2 horizons).
Xeric intergrade - Soil moisture regime is Xeric Aridic
Duripan - The zone from about 38 to 45 inches (Bqkm horizon).
Textural control section - The zone from about 2 to 22 inches. (Bt, Btk1 and part of the Btk2 horizons)

Responsibility for this series was transferred from Davis to Phoenix 9/2015. The last revision to the series was 8/2001. ET

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National Cooperative Soil Survey
U.S.A.