LOCATION BULLFOR                 NV

Established Series
Rev. WRK/RLB/TM
04/2015

BULLFOR SERIES

The Bullfor series consists of moderately deep to a silica-cemented hardpan well-drained soil, That are on sand sheets. Bullfor soils formed in eolian sands over mixed alluvium. Slopes are 0 to 4 percent. The mean annual precipitation is about 6 inches and the mean annual temperature is about 62 degrees F.

TAXONOMIC CLASS: Sandy, mixed, thermic Typic Haplodurids

TYPICAL PEDON: Bullfor gravelly loamy sand. (Colors are for dry soil unless otherwise noted.) Approximately 50 percent of the soil surface is covered with pebbles.

A--0 to 1 inch; very pale brown (10YR 7/3) gravelly loamy sand, yellowish brown (10YR 5/4) moist; weak medium platy structure; soft, very friable, nonsticky and nonplastic; common very fine roots; common fine interstitial pores; 25 percent pebbles; slightly effervescent; moderately alkaline (pH 8.2); abrupt wavy boundary. (1 to 2 inches thick)

Bk--1 to 24 inches; very pale brown (10YR 7/3) loamy sand, yellowish brown (10YR 5/4) moist; massive; soft, very friable, nonsticky and nonplastic; common fine, medium and coarse roots; common fine interstitial pores; 3 percent pebbles; slightly effervescent with strongly effervescent spots; moderately alkaline (pH 8.2); abrupt wavy boundary. (19 to 28 inches thick)

Bqkm--24 to 25 inches; very pale brown (10YR 8/2) silica and lime cemented duripan; very pale brown (10YR 8/4) moist; laminar cap indurated in upper 2 to 3 millimeters and strongly cemented below; very hard, violently effervescent; clear wavy boundary (1 to 3 inches thick)

2Bqk--25 to 60 inches; very pale brown (10YR 8/2) very gravelly sandy loam, very pale brown (10YR 8/4) moist; massive; hard, firm, nonsticky and nonplastic; common very fine and fine interstitial pores; 55 percent pebbles, 10 percent strongly silica and lime-cemented masses; strongly effervescent; strongly alkaline (pH 8.6).

TYPE LOCATION: Nye County, Nevada; in Sarcobatus Flat about 20 miles northwest of Beatty, about 3,000 feet and 2,000 feet east of the northwest corner of section 30, T. 9 S., R. 45 E.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually dry. Moist for short periods of time in the late winter and spring, Typic Aridic soil moisture regime. The ratio of soil moisture utilized for evapotranspiration between summer and winter is about 0.4:1, typical of the Mojave Desert.

Soil temperature - 63 to 67 degrees F.

Depth to duripan - 20 to 40 inches.

Other features - In some pedons a weakly to strongly cemented layer underlies the indurated portion of the duripan.


Control section - Clay content: 2 to 5 percent.

Rock fragments: 0 to 10 percent pebbles.

A horizon - Hue: 10YR or 7.5 YR

Value: 7 or 8 dry; 5 or 6 moist

Chroma: 3 through 5


Bk horizon - Hue 10YR or 7.5YR.

Value: 6 through 8 dry, 4 through 6 moist.

Chroma: 3 through 5.

Structure: Massive or single grained.

Texture: Loamy sand or fine sand.


2Bqkm horizon - Rupture resistance: Strongly cemented to indurated.

2Bqk horizon - 10YR or 7.5YR

Value: 7 or 8 dry or moist.

Chroma: 2 through 4.

Rock fragments: 4o to 60 percent.

COMPETING SERIES: This is the Agon(NV) series. Agon soils have bedrock immediately below the duripan.

GEOGRAPHIC SETTING: Bullfor soils are on gently sloping sand sheets of basin floors. These soils formed in sand sheets over mixed alluvium with a large component from volcanic rock sources. Slopes are 0 to 4 percent. Elevations are 2,000 to 4,200 feet. The climate is arid with cool winters and hot dry summers, typical of the Mojave Desert. Distribution of precipitation is relatively even with slight peaks in January and August. The mean annual precipitation is about 3 to 9 inches; mean annual temperature is about 58 to 64 degrees F., and the frost-free season is about 210 to 250 days.

GEOGRAPHICALLY ASSOCIATED SOILS: The Canutio series. The Canutio soils have a loamy-skeletal control section and lack a hardpan.

DRAINAGE AND PERMEABILITY: Well drained. Slow runoff; rapid permeability.

USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly white burrobrush, and wolfberry and shadscale with some spiny mendora.

DISTRIBUTION AND EXTENT: Southern Nevada. These soils are not extensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA

SERIES ESTABLISHED: Nye County, Nevada, (Southwest Part). 1994. The name is coined from Bullfrog Hills, an area north of Beatty.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Duripan - The zone from about 24 to 25 inches (2Bqkm horizon).

Textural control section - The zone from 10 to about 24 inches (lower portion of Bk horizon).

Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 1/2001. ET

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National Cooperative Soil Survey
U.S.A.