LOCATION MACYFLET                NV+OR

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

MACYFLET SERIES

The Macyflet series consists of very deep, moderately well drained soils that formed in lacustrine deposits derived mainly from volcanic rocks. Macyflet soils are on interplateau basins. Slopes are 0 to 2 percent. The mean annual precipitation is about 300 mm and the mean annual temperature is about 6 degrees C.

TAXONOMIC CLASS: Very-fine, smectitic, frigid Vertic Paleargids

TYPICAL PEDON: Macyflet silty clay loam--rangeland. (Colors are for dry soil unless otherwise noted.)

A1--0 to 5 cm; light gray (10YR 7/2) silty clay loam, dark grayish brown (10YR 4/2) moist; weak thick platy structure; slightly hard, very friable, moderately sticky and moderately plastic; common fine roots; common medium, many fine and very fine vesicular pores; neutral (pH 7.0); abrupt smooth boundary. (3 to 8 cm thick)

A2--5 to 23 cm; light brownish gray (10YR 6/2) silty clay loam, dark grayish brown (10YR 4/2) moist; massive; slightly hard, very friable, moderately sticky and moderately plastic; common very fine, fine and medium roots; few fine tubular and many very fine interstitial pores; neutral (pH 7.0); abrupt smooth boundary. (0 to 18 cm thick)

Bt1--23 to 38 cm; light brownish gray (10YR 6/2) crushed, clay, brown (10YR 4/3) moist; strong medium prismatic structure parting to moderate medium angular blocky; hard, very friable, very sticky and very plastic; few fine and medium roots; common very fine interstitial pores, few fine and very fine tubular pores; many pressure cutans on faces of peds; neutral (pH 7.0); abrupt smooth boundary. (0 to 15 cm thick)

Bt2--38 to 81 cm; pale brown (10YR 6/3) clay, brown (10YR 4/3) moist; strong medium prismatic structure; very hard, very firm, very sticky and very plastic; few fine and medium roots; very few fine tubular pores; many pressure cutans on faces of peds; neutral (pH 7.0); gradual smooth boundary. (38 to 64 cm thick)

Bt3--81 to 119 cm; light yellowish brown (10YR 6/4) clay, olive brown (2.5Y 4/4) moist; strong fine angular blocky structure; very hard, very firm, very sticky and very plastic; very few roots; very few fine tubular pores; few fine distinct light olive brown (2.5Y 5/6) masses of iron accumulation; many pressure cutans on faces of peds; slightly alkaline (pH 7.6); abrupt smooth boundary. (25 to 64 cm thick)

2C1--119 to 124 cm; white (10YR 8/1) ashy loamy sand, light gray (10YR 7/1) moist; massive; hard, very friable, nonsticky and nonplastic; slightly alkaline (pH 7.6); abrupt smooth boundary. (0 to 8 cm thick)

2C2--124 to 152 cm; light gray (2.5Y 7/2) ashy loamy fine sand, light brownish gray (2.5Y 6/2) moist; massive; slightly hard, very friable, nonsticky and nonplastic; common very fine interstitial pores; common fine prominent brownish yellow (10YR 6/8) masses of iron accumulation; moderately alkaline (pH 8.2).

TYPE LOCATION: Washoe County, Nevada; about 150 feet south of the Oregon-Nevada state line and 150 feet east of road line in Macy Flat; approximately 2,500 feet west and 150 feet south of the northeast corner of section 17, T. 47 N., R. 21 E.; USGS Coleman Canyon 7.5 minute topographic quadrangle; latitude 41 degrees 59 minutes 44 seconds N and longitude 119 degrees 38 minutes 45 seconds W; WGS84 Decimal Degrees 41.9955556 latitude, -119.6447222 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry, moist in winter and spring; dry from July through October. Saturated below 150 cm in most years, in the early spring; aridic soil moisture regime that borders on xeric.
Mean annual soil temperature: 6 to 8 degrees C.
Depth to base of argillic horizon: 76 to 150 cm.
Linear extensibility (LE): 6 to 9 cm.
Other features: An abrupt horizon boundary is normally present between the A2 and Bt1 horizons accompanied by an abrupt increase in clay content of 20 percent or more.

Particle-size control section - Clay content: 60 to 70 percent.

A horizon
Value: 6 or 7 dry; 3 through 5 moist.
Reaction: Slightly acid through slightly alkaline.

Bt1 and Bt2 horizons
Value: 5 or 6 dry, 3 through 5 moist.
Chroma: 3 or 4, may be 2 in Bt1 horizon.
Clay content: 60 to 70 percent.
Structure: Prismatic or columnar sometimes parting to angular blocky
Consistence: Very hard or extremely hard dry, may be hard in Bt1 horizon.
Reaction: Slightly acid through slightly alkaline.
Other features: Common to many pressure cutans on faces of peds.

Bt3 horizon
Hue: 10YR or 2.5Y moist.
Value: 5 or 6 dry, 3 through 5 moist.
Chroma: 3 or 4, dry or moist.
Clay content: 60 to 70 percent.
Structure: Angular blocky; some pedons have prismatic parting to angular blocky.
Consistence: Very hard or extremely hard dry.
Reaction: Slightly acid through slightly alkaline.
Other features: Common to many pressure cutans on faces of peds.

2C horizons
Hue: 10YR or 2.5Y.
Texture: Ashy loamy sand or ashy loamy fine sand.
Clay content: 0 to 10 percent.
Reaction: Slightly alkaline through strongly alkaline.
Other features: This layer when present is dominated by volcanic ash.

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

GEOGRAPHIC SETTING: Macyflet soils are on interplateau basins. These soils formed in lacustrine deposits derived mainly from volcanic rocks. Slopes are 0 to 2 percent. Elevations range from 1,740 to 1,895 meters. The climate is semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 250 to 360 mm, the mean annual temperature is 6 to 7 degrees C, and the frost-free period is 60 to 90 days.

GEOGRAPHICALLY ASSOCIATED SOILS: This is the Boulder Lake soil. Boulder Lake soils have vertical cracks that open to the surface in most years and are saturated for at least one month in most years.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained; medium surface runoff; low saturated hydraulic conductivity. Endosaturation is present with an apparent seasonal high water table between 150 and 180 cm (very deep free water occurrence class) between December and May. Cumulative annual duration class is Common.

USE AND VEGETATION: Macyflet soils are used for rangeland and wildlife habitat. The present vegetation is mainly low sagebrush and Sandberg's bluegrass.

DISTRIBUTION AND EXTENT: Northwestern Nevada and south-central Oregon. These soils are not extensive with about 7,100 acres of the series mapped to date. MLRA 23.

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

SERIES ESTABLISHED: Lake County, Oregon (Southern Part), 1991.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - The zone from the soil surface to 23 cm (A1 and A2 horizons).
Paleargids great group feature and abrupt textural change - The abrupt clay increase of more than 20 percent at 23 cm (between the A2 and Bt1 horizons).
Argillic horizon - The zone from 23 to 119 cm (Bt1, Bt2, and Bt3 horizons)
Vertic subgroup feature - The zone from the soil surface to 100 cm with linear extensibility of 6.0 cm or more.
Endosaturation feature - The condition of ground water with an upper boundary between 150 and 180 cm at certain times during normal years (part of the 2C2 horizon).
Particle-size control section - The zone from 23 to 73 cm (Bt1 and part of the Bt2 horizons).

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National Cooperative Soil Survey
U.S.A.