LOCATION MINDLEBAUGH             NV

Established Series
Rev. EWB-TM-JVC-JBF
04/2017

MINDLEBAUGH SERIES

The Mindlebaugh series consists of very deep, somewhat poorly drained soils that formed in alluvium derived from mixed sources. Mindlebaugh soils are on flood plains. Slopes are 0 to 2 percent. The mean annual precipitation is about 230 mm and the mean annual temperature is about 9 degrees C.

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Fluvaquentic Haploxerolls

TYPICAL PEDON: Mindlebaugh clay loam--irrigated pasture. (Colors are for dry soil unless otherwise noted.)

Ap--0 to 10 cm; gray (10YR 5/1) clay loam, very dark brown (10YR 2/2) moist; moderate fine subangular blocky structure; very hard, friable, moderately sticky and moderately plastic; many very fine and fine roots; many very fine and fine tubular pores; slightly effervescent; strongly alkaline (pH 8.8); clear smooth boundary. (8 to 20 cm thick)

A--10 to 25 cm; gray (10YR 5/1) clay loam, very dark brown (10YR 2/2) moist; weak medium subangular blocky structure; hard, friable, moderately sticky and moderately plastic; many very fine and fine roots; many very fine and few medium tubular pores; strongly effervescent; strongly alkaline (pH 8.8); clear wavy boundary. (10 to 15 cm thick)

Bk1--25 to 43 cm; gray (2.5Y 5/1) sandy clay loam, dark grayish brown (2.5Y 4/2) moist; weak coarse subangular blocky structure; hard, friable, slightly sticky and slightly plastic; many very fine and fine roots; many very fine and fine tubular and interstitial pores; secondary carbonates segregated in common fine and medium masses and filaments; few fine faint dark gray (10YR 4/1) moist, zones of iron depletion; strongly effervescent; strongly alkaline (pH 8.8); clear wavy boundary. (18 to 23 cm thick)

Bk2--43 to 69 cm; gray (2.5Y 6/1) fine sandy loam, dark grayish brown (2.5Y 4/2) moist; massive; moderately hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; many very fine and fine tubular pores; secondary carbonates segregated in common fine masses; common medium faint dark brown (10YR 3/3) moist, masses of iron accumulation; strongly effervescent; strongly alkaline (pH 8.8); clear wavy boundary. (0 to 30 cm thick)

Agb--69 to 81 cm; grayish brown (2.5Y 5/2) silty clay loam, very dark grayish brown (2.5Y 3/2) moist; weak fine subangular blocky structure; hard, friable, moderately sticky and moderately plastic; many very fine and fine roots; many very fine and fine tubular pores; common fine and medium faint dark brown (10YR 3/3) moist, masses of iron accumulation; strongly alkaline (pH 8.6); clear smooth boundary. (13 to 18 cm thick)

Cg1--81 to 99 cm; grayish brown (2.5Y 5/2) sandy clay loam, olive gray (5Y 4/2) moist; massive; hard, friable, moderately sticky and slightly plastic; common very fine and fine roots; common very fine and few fine tubular pores; few flakes of mica; common fine and medium distinct olive brown (2.5Y 4/4) moist, masses of iron accumulation; moderately alkaline (pH 8.4); clear wavy boundary. (15 to 20 cm thick)

Cg2--99 to 140 cm; light olive gray (5Y 6/2) fine sandy loam, olive gray (5Y 4/2) moist; massive; moderately hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common very fine and fine tubular pores; few flakes of mica; many fine and medium distinct dark brown (10YR 3/3) moist, masses of iron accumulation and common fine faint dark gray (2.5Y 4/1) moist, zones of iron depletion; moderately alkaline (pH 8.4); clear wavy boundary. (33 to 46 cm thick)

Cg3--140 to 165 cm; light olive gray (5Y 6/2) fine sandy loam, olive gray (5Y 4/2) moist; massive; moderately hard, friable, slightly sticky and nonplastic; few very fine roots; common very fine and common fine tubular pores; few flakes of mica; many fine faint olive (5Y 4/3) moist, masses of iron accumulation and many fine faint dark gray (5Y 4/1) moist, zones of iron depletion; moderately alkaline (pH 8.4).

TYPE LOCATION: Douglas County, Nevada; about one mile northeast of Mottsville near Johnson Slough; approximately 1,300 feet south and 2,000 feet east of the northwest corner of section 2, T. 12 N., R. 19 E.; USGS Minden 7.5 minute topographic quadrangle; latitude 38 degrees 56 minutes 08 seconds N and longitude 119 degrees 49 minutes 0 seconds W; WGS84 Decimal Degrees 38.9354500 latitude, -119.8165500 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Moist in the moisture control section during winter and spring, dry in summer and fall unless irrigated; aridic moisture regime that borders on xeric.
Mean annual soil temperature: 9 to 12 degrees C.
Mollic epipedon thickness - 25 to 50 cm, may be as thin as 7 cm where fields have been land leveled.
Depth to horizons with secondary carbonates: 25 to 76 cm.
Depth to aquic conditions: 50 to 76 cm.

Particle-size control section - Clay content: averages 18 to 25 percent; Rock fragments: averages 0 to 15 percent, mainly gravel.

Ap and A horizons
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Reaction: Slightly alkaline to very strongly alkaline.
Salinity (EC): 0 to 32 mmhos/cm.
Sodicity (SAR): 1 to 45.
Organic matter content: 1 to 3 percent.

Bk horizons
Hue: 10YR or 2.5Y.
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 1 or 2 dry, 2 or 3 moist.
Texture: Stratified silty clay loam to fine sandy loam. Some pedons have thin strata of loamy sand to coarse sand.
Reaction: Slightly alkaline to very strongly alkaline.
Salinity (EC): 0 to 16 mmhos/cm.
Sodicity (SAR): 1 to 45.
Effervescence: Strongly effervescent or violently effervescent.
Identifiable secondary carbonates: Occurs as common or many masses or filaments.
Calcium carbonate equivalent: 1 to 5 percent.
Redoximorphic features: Redox concentrations occur as masses of iron accumulation. Redox depletions occur as few fine faint zones of iron depletion.

Agb horizon
Hue: 10YR or 2.5Y.
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 or 2, dry or moist.
Texture: Stratified silty clay loam to fine sandy loam.
Structure: Subangular blocky or it is massive.
Reaction: Slightly alkaline to strongly alkaline.
Salinity (EC): 0 to 16 mmhos/cm.
Sodicity (SAR): 1 to 45.
Effervescence: Noneffervescent or slightly effervescent.
Redoximorphic features: Redox concentrations occur as common or many masses of iron accumulation. Redox depletion of iron has occurred in the matrix and is indicated by strong gleying.

Cg horizons
Hue: 2.5Y, 5Y, or N (neutral).
Value: 5 through 7 dry, 3 through 5 moist.
Chroma: 0 (when neutral hue), and 1 or 2, dry or moist.
Texture: Stratified silty clay loam to fine sandy loam. Some pedons have strata of loamy sand to coarse sand.
Reaction: Slightly alkaline to strongly alkaline.
Salinity (EC): 0 to 8 mmhos/cm.
Sodicity (SAR): 0 to 12.
Redoximorphic features: Redox concentrations occur as common or many masses of iron accumulation. Redox depletion of iron has occurred in the matrix as indicated by strong gleying and smaller zones of iron depletion are also present.

COMPETING SERIES: These are the Diyou and Truckee series. Diyou soils have a xeric moisture regime and do not have horizons with identifiable secondary carbonates. Truckee soils do not have horizons with identifiable secondary carbonates.

GEOGRAPHIC SETTING: Mindlebaugh soils are on flood plains. These soils formed in alluvium derived from mixed sources. Slopes are 0 to 2 percent. Elevations range from 1,405 to 1,650 meters. The climate is semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation 20 to 25 mm, mean annual temperature is 8 to 11 degrees C., and the frost-free period is 90 to 110 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dangberg and Heidtman soils. Dangberg soils have natric horizons and duripans. Heidtman soils have thick mollic epipedons and seasonal high water tables within 91 to 150 mm of the soil surface.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat poorly drained; medium surface runoff; moderately slow permeability; moderately high saturated hydraulic conductivity. Endosaturation is present with a seasonal high water table between 50 and 76 cm (moderately deep internal free water occurrence class) from January through May. Cumulative annual duration class is common. These soils are susceptible to occasional flooding for brief periods between December and May. Down-cutting of streams and manipulation of the adjacent watershed has altered the natural hydrology in some areas.

USE AND VEGETATION: Mindlebaugh soils are used primarily for irrigated pasture. Some areas are cropped in rotation with alfalfa and small grains. In rangeland areas the vegetation is mainly black greasewood, rabbitbrush, inland saltgrass, and foxtail.

DISTRIBUTION AND EXTENT: Western Nevada. These soils are not extensive. MLRA 26.

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

SERIES ESTABLISHED: Douglas County, Nevada, 2010.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 25 cm (Ap and A horizons).
Identifiable secondary carbonates - The zone from 25 to 69 cm (Bk1 and Bk2 horizons).
Aquic conditions - The conditions of endosaturation and reduction accompanied by redox depletions in the zone from 50 to 165 cm (Agb, Cg1, Cg2, and Cg3 horizons).
Particle size control section - The zone from 25 to 100 cm (Bk1, Bk2, Agb, and Cg1 horizons and part of the Cg2 horizon).

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National Cooperative Soil Survey
U.S.A.