LOCATION KIMVAR                  NV+CA

Established Series
Rev. EWB/TM/JBF
03/2017

KIMVAR SERIES

The Kimvar series consists of very deep, very poorly drained soils that formed in alluvium from mixed rock sources. The Kimvar soils are adjacent to seep areas on alluvial fan toeslopes. Slopes are 2 to 8 percent. The mean annual precipitation is about 250 mm and the mean annual temperature is about 10 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Histic Endoaquolls

TYPICAL PEDON: Kimvar mucky peat, pasture. (Colors are for dry soil unless otherwise noted.)

Oe--0 to 20 cm; very dark gray (10YR 3/1) mucky peat, black (10YR 2/1) moist; about 60 percent herbaceous fiber material unrubbed, about 25 percent rubbed; slightly acid (pH 6.3); abrupt smooth boundary. (20 to 30 cm thick)

A--20 to 81 cm; grayish brown (10YR 5/2) loam, black (10YR 2/1) moist; few prominent medium and coarse strong brown (7.5YR 5/6) moist redox concentrations; massive; hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine and fine tubular and interstitial pores; 10 percent gravel; neutral (pH 6.6); gradual smooth boundary. (25 to 70 cm thick)

C--81 to 152 cm; gray (5Y 5/1) stratified gravelly loam and gravelly clay loam, black (5Y 2.5/1) moist; few medium and coarse prominent dark greenish gray (5GY 4/1) moist redox depletions; massive; hard, friable, slightly sticky and slightly plastic; common fine and medium roots; common very fine to medium tubular pores; 15 percent gravel; neutral (pH 6.7).

TYPE LOCATION: Douglas County, Nevada; about 1,500 feet south and 1,900 feet east of the northwest corner of section 15, T. 13 N., R. 19 E.; USGS Minden 7.5 minute topographic quadrangle; latitude 38 degrees 52 minutes 37 seconds N and longitude 119 degrees 50 minutes 13 seconds W; WGS84 Decimal Degrees 38.9936111 latitude, -119.8369444 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually saturated to the surface throughout most of the year in most years; aquic soil moisture regime.
Mean annual soil temperature: 8 to 12 degrees C.
Histic epipedon thickness: 20 to 30 cm.
Mollic epipedon thickness: 46 to 76 cm.

Particle-size control section - Clay content: 18 to 27 percent.
Rock fragments: Averages less than 35 percent.

O horizon
Hue: 10YR or N (neutral).
Value: 3 or 4 dry, 2 or 2.5 moist.
Chroma: 0, 1 or 2.
Reaction (1:1 water): slightly acid.

A horizon
Hue: 10YR, 2.5Y or is N (neutral).
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2 dry, 0 or 1 moist.

C horizon
Hue: 2.5Y, 5Y, 5GY or is N (neutral).
Value: 5 or 6 dry, 2 through 5 moist.
Chroma: 0 through 2.
Texture: Stratified gravelly loam and clay loam.
Clay content: Averages 18 to 30 percent.
Rock fragments: 15 to 35 percent.
Redoximorphic features: Few to many redox depletions and/or concentrations are present in most pedons. Gleyed colors may dominate the matrix.

COMPETING SERIES: There are currently no other series in this family.

GEOGRAPHIC SETTING: Kimvar soils are adjacent to seep areas on alluvial fan toeslopes. These soils formed in alluvium from mixed rock sources. Slopes are 2 to 8 percent. Elevations are 1,405 to 1,590 meters. The climate is cool, semiarid with cool moist winters and warm dry summers. The mean annual precipitation is 200 to 300 mm; mean annual temperature is 8 to 11 degrees C., and frost-free period is 90 to 110 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Holbrook and Jamedoggle soils. Holbrook soils have a loamy-skeletal particle-size control section. Jamedoggle soils do not have aquic conditions within 50 cm of the surface and lack a histic epipedon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Very poorly drained; medium runoff; moderate permeability; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Irrigated hayland, pastureland and wildlife habitat. The present vegetation is mainly hayland and pasture species, including sedges and rushes.

DISTRIBUTION AND EXTENT: North-western, Nevada and eastern California. These soils are not extensive. MLRA 26.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California.

SERIES ESTABLISHED: Mono County (Coleville-Bridgeport Area), California, 2010.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Histic epipedon - The zone from the surface to about 20 cm. (Oe horizon).
Mollic epipedon - The zone from about 20 to 81 cm. (A horizon).
Particle-size control section - The zone from about 25 to 100 cm. (lower A and upper C horizons).

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National Cooperative Soil Survey
U.S.A.