LOCATION JESAYNO                 NV+CA

Established Series
Rev. SES/JBF/TM/JVC
12/2019

JESAYNO SERIES

The Jesayno series consists of very deep, well drained soils that formed in volcanic ash and alluvium derived from volcanic and sedimentary rocks over lacustrine deposits. Jesayno soils are on inset fans. Slopes are 0 to 2 percent. The mean annual precipitation is about 230 mm and the mean annual temperature is about 8 degrees C.

TAXONOMIC CLASS: Ashy, glassy, mesic Vitrixerandic Haplocambids

TYPICAL PEDON: Jesayno ashy silt loam--rangeland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 8 cm; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; moderate thin and medium platy structure; slightly hard, very friable, moderately sticky and moderately plastic; many very fine and common fine roots; many very fine, common fine vesicular and interstitial pores; moderately alkaline (pH 8.2); clear wavy boundary. (8 to 13 cm thick)

A2--8 to 30 cm; light brownish gray (10YR 6/2) ashy silt loam, very dark grayish brown (10YR 3/2) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, moderately sticky and moderately plastic; many very fine and common fine roots; many fine tubular pores; moderately alkaline (pH 8.4); clear wavy boundary. (13 to 25 cm thick)

Bw1--30 to 46 cm; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; moderate medium and coarse subangular blocky structure; slightly hard, very friable, moderately sticky and moderately plastic; common very fine and fine roots; many very fine tubular pores; moderately alkaline (pH 8.4); clear wavy boundary. (15 to 40 cm thick)

Bw2--46 to 61 cm; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; weak medium and coarse subangular blocky structure; slightly hard, very friable, moderately sticky and moderately plastic; common very fine and few fine roots; many very fine tubular pores; moderately alkaline (pH 8.4); clear wavy boundary. (0 to 30 cm thick)

Bq--61 to 104 cm; pale brown (10YR 6/3) ashy silt loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, moderately sticky and moderately plastic; common very fine and few fine roots; many very fine tubular pores; 15 percent 10 to 25 mm weak cemented durinodes; moderately alkaline (pH 8.4); clear wavy boundary. (25 to 70 cm thick)

Bk1--104 to 132 cm; very pale brown (10YR 7/3) ashy silt loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, moderately sticky and moderately plastic; common very fine roots; common very fine tubular pores; few fine light gray (10YR 7/2) masses of secondary carbonate; slightly effervescent; moderately alkaline (pH 8.4); clear wavy boundary.

Bk2--132 to 157 cm; very pale brown (10YR 7/3) ashy silt loam, brown (10YR 4/3) moist; massive; slightly hard, very friable, moderately sticky and moderately plastic; few very fine roots; common very fine tubular pores; few fine light gray (10YR 7/2) masses of secondary carbonate; strongly effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: Washoe County, Nevada; on the southeast side of Duck Flat; approximately 1,400 feet east and 2,600 feet south of the northwest corner of section 32, T. 36 N., R. 20 E.; USGS Rye Patch Canyon 7.5 minute topographic quadrangle; latitude 40 degrees 57 minutes 19.8 seconds N and longitude 119 degrees 46 minutes 01.8 seconds W; WGS84 Decimal Degrees 40.9555000 latitude, -119.7671667 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry; moist in winter and spring, dry June through October; aridic soil moisture regime that borders on xeric.
Mean annual soil temperature: 8 to 10 degrees C.
Depth to base of cambic horizon: 25 to 76 cm.
Volcanic glass content: 40 to 60 percent in coarse silt through fine sand fractions.

Particle-size control section - Clay content: 18 to 27 percent.

A horizon
Hue: 10YR or 2.5Y.
Value: 5 through 7 dry, 3 or 4 moist.
Chroma: 2 or 3, dry or moist.
Structure: Weak to strong very thin through medium platy in the upper part, platy or blocky in the lower part.
Consistence: Soft or slightly hard, dry.
Reaction: Slightly alkaline or moderately alkaline.
Effervescence: Noneffervescent or slightly effervescent.

Bw horizon
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 or 4 moist.
Chroma: 2 or 3, dry or moist.
Texture: Ashy silt loam; thin strata of ashy very fine sandy loam are in some pedons.
Structure: Weak or moderate very fine to coarse subangular blocky.
Effervescence: Noneffervescent or slightly effervescent.
Reaction: Slightly alkaline or moderately alkaline.

Bq horizon (and Bqk horizon when present)
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 or 4 moist.
Chroma: 2 through 4, dry or moist.
Consistence: Slightly hard or hard, very friable or friable.
Reaction: Slightly alkaline or moderately alkaline.
Durinodes: 2 to 18 percent durinodes in a very friable or friable matrix.
Identifiable secondary carbonates: None to few very fine masses or threads.

Bk horizon
Hue: 10YR or 2.5Y.
Value: 6 or 7 dry, 3 or 4 moist.
Chroma: 2 through 4, dry or moist.
Structure: Subangular blocky or massive.
Reaction: Moderately alkaline through very strongly alkaline.
Effervescence: Slightly effervescent through violently effervescent.
Identifiable secondary carbonates: Few to common masses or threads.

COMPETING SERIES: This is the Delrio series. Delrio soils have 2 to 25 percent medium to very coarse sand-size (0.5 to 2.0 mm diameter) pumiceous ash and 3 to 12 percent clay in the particle-size control section.

GEOGRAPHIC SETTING: Jesayno soils are on inset fans. These soils formed in volcanic ash and alluvium derived from volcanic and sedimentary rocks over lacustrine deposits. Slopes are 0 to 2 percent. Elevations range from 1,355 to 1,815 meters. The climate is semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 200 to 250 mm, the mean annual temperature is 7 to 9 degrees C, and the frost-free period is 100 to 120 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Couch, Macnot, and Nevadash soils. Couch soils are fine and have natric horizons. Macnot soils are ashy-skeletal. Nevadash soils have argillic horizons and more than 20 percent durinodes.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; low surface runoff; moderately high saturated hydraulic conductivity. These soils are susceptible to occasional flooding for very brief periods between December and June.

USE AND VEGETATION: Jesayno soils are used for rangeland and wildlife habitat. The present vegetation is mainly basin big sagebrush, basin wildrye, and rubber rabbitbrush.

DISTRIBUTION AND EXTENT: Northwestern Nevada and northeastern California. These soils are moderately extensive. MLRA 23.

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

SERIES ESTABLISHED: Surprise Valley-Home Camp Area, California and Nevada, 2006.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 18 cm (A1 and part of the A2 horizons).
Cambic horizon - The zone from 30 to 61 cm (Bw1 and Bw2 horizons).
Durinodes - The zone from 61 to 104 cm (Bq horizon).
Identifiable secondary carbonates - The zone from 104 to 157 cm (Bk1 and Bk2 horizons).
Particle-size control section and ashy substitute class with glassy mineralogy - The zone from 25 to 100 cm (Bw1, Bw2 and parts of the A2 and Bq horizons).

---

National Cooperative Soil Survey
U.S.A.