LOCATION IDLEWILD NV

Established Series
Rev. WED/JBF
01/2023

IDLEWILD SERIES

The Idlewild series consists of very deep, somewhat poorly drained soils that formed in alluvium derived from mixed rocks. These soils are on terraces and have slopes of 0 to 2 percent. The mean annual precipitation is about 200 mm and the mean annual temperature is about 10 degrees C.

TAXONOMIC CLASS: Fine, smectitic, mesic Aquic Argixerolls

TYPICAL PEDON: Idlewild clay loam--pasture. (Colors are for moist soil unless otherwise noted.)

A--0 to 10 cm: very dark grayish brown (2.5Y 3/2) heavy loam, grayish brown (2.5Y 5/2) dry; moderate medium angular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine through medium roots; many very fine through medium pores; many large prominent reddish brown (5YR 4/4) redox concentrations; slightly acid (pH 6.2); clear wavy boundary. (10 to 15 cm thick)

A2--10 to 20 cm; very dark grayish brown (2.5Y 3/2) clay loam, dark grayish brown (2.5Y 4/2) dry; weak fine prismatic structure; slightly hard, friable, slightly sticky and moderately plastic; many very fine and fine roots; many very fine and fine pores; many large prominent reddish brown (5YR 4/4) redox concentrations; slightly acid (pH 6.2); clear smooth boundary. (10 to 30 cm thick)

AB--20 to 33 cm; olive brown (2.5Y 4/4) clay loam, olive brown (2.5Y 4/4) dry; massive; hard, firm, moderately sticky and moderately plastic; common very fine and fine roots; common very fine pores; many large prominent brown (7.5YR 4/4) redox concentrations; slightly acid (pH 6.2); gradual smooth boundary. (8 to 15 cm thick)

Bt1--33 to 58 cm; olive brown (2.5Y 4/4) silty clay, dark yellowish brown (10YR 4/4) dry; weak coarse prismatic structure; very hard, very firm, moderately sticky and very plastic; few very fine roots; common very fine pores; common faint clay films on faces of peds, few thin clay films in pores; many large prominent brown (7.5YR 4/4) redox concentrations; some manganese concretions; slightly acid (pH 6.5); clear wavy boundary. (20 to 36 cm thick)

Bt2--58 to 91 cm; olive brown (2.5Y 4/4) heavy silty clay loam, olive brown (2.5Y 4/4) dry; weak medium angular blocky structure; hard, firm, moderately sticky and very plastic; very few roots; very few pores; common faint clay films; many large prominent brown (7.5YR 4/4) redox concentrations; some manganese concretions; slightly acid (pH 6.5); gradual wavy boundary. (20 to 38 cm thick)

C1--91 to 119 cm; olive brown (2.5Y 4/4) silty clay loam, yellowish brown (10YR 5/4) dry; weak fine angular blocky structure; hard, firm, moderately sticky and moderately plastic; very few roots; very few pores; very few clay films in pores; many large prominent brown (7.5YR 4/4) redox concentrations; neutral (pH 7.0); clear smooth boundary. (25 to 50 cm thick)

C2--119 to 157 cm; dark yellowish brown (10YR 4/4) sandy clay loam, yellowish brown (10YR 5/4) dry; massive; hard, friable, moderately sticky and moderately plastic; very few roots; very few pores; few fine faint brown (7.5YR 4/4) redox concentrations; neutral (pH 7.0); abrupt wavy boundary. (0 to 38 cm thick)

2C--157 to 173 cm; dark yellowish brown (10YR 4/4) gravelly sand, brown (10YR 5/3) dry; single grained; loose, nonsticky and nonplastic; neutral (pH 7.0).

TYPE LOCATION: Washoe County, Nevada; about 1,700feet west and 400 feet south of the northeast corner of section 6, T. 19 N., R. 20 E.; USGS Reno 7.5 minute topographic quadrangle; latitude 39 degrees 32 minutes 53 seconds N and longitude 119 degrees 46 minutes 38 seconds W; WGS84 Decimal Degrees 39.5480556 latitude, -119.7772222 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Saturated at depths of 50 to 100 cm during a large part of the year. Xeric soil moisture regime bordering on aridic.
Mean annual soil temperature: 10 to 11 degrees C.
Depth to base of argillic: 76 to 100 cm.

Particle-size control section - Clay content: 35 to 45 percent.

A horizons
Hue: 2.5Y or l0YR.
Value: 4 or 5 dry.

Bt horizons
Hue of 2.5Y or l0YR.
Value: 4 or 5 moist.
Chroma of 3 or 4.
Texture: Clay, silty clay, clay loam, or heavy silty clay loam.
Reaction: Slightly acid or neutral.

C horizons
Texture: Sandy clay loam, silty clay loam, sandy clay loam, or clay.
Redox concentrations: Few to many redox concentrations.

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

GEOGRAPHIC SETTING: Idlewild soils are on alluvial fans and low terraces at elevations of 1,310 to 1,405 meters. Slopes are 0 to 2 percent. They have formed in alluvium derived from mixed rocks. The climate is semiarid with a mean annual precipitation of about 200 mm; mean annual temperature is about 10 degrees C; and a frost-free season of about 100 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fleischmann, Orr, Truckee, and Voltaire soils. Fleischmann and Orr soils are well drained and lack mottles. Truckee and Voltaire soils lack an argillic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; slow runoff; slow permeability; moderately low saturated hydraulic conductivity. Many of these areas have been artificially drained.

USE AND VEGETATION: Pasture and urban development. Vegetation is mostly meadow grass.

DISTRIBUTION AND EXTENT: Reno area of southwestern Washoe County. The series is of small extent.

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

SERIES ESTABLISHED: Washoe County, South Part, Nevada, 1980.

REMARKS: REMARKS: Diagnostic horizons and other features recognized in this pedon are:
Mollic epipedon - The zone from the surface to 25 cm when mixed (A1, A2 and part of the AB horizons).
Argillic horizon - The zone from 33 to 91 cm (Bt1 and Bt2 horizons).
Zone of endosaturation (relict) - The zone from the soil surface to 157 cm (A1, A2, AB, Bt1, Bt2, C1 and C2 horizons).
Aquic feature - Saturated at depths of 50 to 100 cm during a large part of the year.
Particle-size control section - The zone from 33 to 83 cm (Bt1 and part of the Bt2 horizons).

ADDITIONAL DATA: User Pedon ID: 2006NV031055.

National Cooperative Soil Survey
U.S.A.