LOCATION GREENFIELD CA
Established Series
Rev. LCL/GWH/RWK
04/2019
GREENFIELD SERIES
The Greenfield series consists of deep, well drained soils that formed in moderately coarse and coarse textured alluvium derived from granitic and mixed rock sources. Greenfield soils are on alluvial fans and terraces and have slopes of 0 to 30 percent. The mean annual precipitation is about 15 inches and the mean annual air temperature is about 62 degrees F.
TAXONOMIC CLASS: Coarse-loamy, mixed, active, thermic Typic Haploxeralfs
TYPICAL PEDON: Greenfield coarse sandy loam, annual grass pasture. (Colors are for dry soil unless otherwise noted.)
A1--0 to 23 inches; pale brown (10YR 6/3) coarse sandy loam, dark brown (10YR 4/3) moist; massive; slightly hard, very friable, nonsticky and nonplastic; slightly acid (pH 6.3); gradual smooth boundary. (8 to 30 inches thick)
B1--23 to 37 inches; light yellowish brown (10YR 6/4) sandy loam, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; thin patchy clay film; neutral (pH 6.6); gradual smooth boundary. (10 to 20 inches thick)
B2t--37 to 51 inches; light yellowish brown (10YR 6/4) fine sandy loam, dark yellowish brown (10YR 4/4) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; thin patchy clay films; neutral (pH 6.8); gradual smooth boundary. (10 to 20 inches thick)
C--51 to 72 inches; brownish yellow (10YR 6/6) and yellow (10YR 7/6) stratified loamy sand, sandy loam, and fine sandy loam; yellowish brown (10YR 5/6) moist; massive; soft, very friable; neutral (pH 7.0).
TYPE LOCATION: Madera County, California; SW1/4 NW1/4 section 18, T.10S., R.18E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 59 to 65 degrees F. and the soil temperature is not below 47 degrees F. at any time for more than a few days all of the time from late April or May until November or early December and usually is moist in some or all parts of the moisture control section all the rest of the year. Rock fragments range from less than 1 to 25 percent in the A and B horizons. Coarse and very coarse sand average more than 20 percent.
The A horizon is pale brown, light brownish gray, grayish brown, brown, light yellowish brown, dark yellowish brown, yellowish brown, pinkish gray or light brown (10YR 6/2, 6/3, 6/4, 5/2, 5/3, 5/4, 4/3, 4/4; 7.5YR 5/2, 5/4, 6/2, 6/4). It is loamy sand, sandy loam, fine sandy loam or gravelly equivalents of each. This horizon contains less than 1 percent organic matter in all parts. It is slightly acid to mildly alkaline. The lower boundary is gradual or clear.
The B2t horizon is pale brown , brown, light brown, light gray, light yellowish brown, yellowish brown, dark yellowish brown, grayish brown, reddish yellow, pink or brownish yellow (10YR 6/1, 6/3, 5/3, 6/4, 6/6, 5/4, 5/6, 5/8, 4/4, 4/6, 7/4, 7/6, 5/2; 7.5YR 5/2, 5/4, 4/2, 4/4, 6/4, 6/6, or 7/4). It is heavy sandy loam, heavy fine sandy loam, or gravelly equivalents of each and has 3 to 6 percent more clay than the A horizon. This horizon is slightly acid to mildly alkaline.
The C horizon is light yellowish brown, very pale brown, yellowish brown, pale brown, light brownish yellow (10YR 6/4, 5/4, 5/6, 5/8, 6/3, 6/2, 6/6, 6/8, 7/3, 7/4, 4/2, 4/4) or brown (7.5YR 4/4, 4/2). It is loamy sand, coarse sandy loam, sandy loam, fine sandy loam or gravelly equivalents of each. This horizon is neutral to moderately alkaline. Some pedons have silica cementation or contrasting soil material or more than 35 percent gravel, all below 40 inches.
COMPETING SERIES: These are the
Atwater and
Dinuba series in the same family and the
Hanford,
Oakdale,
Ramona, and
Snelling series. Atwater soils average less than 20 percent coarse and very coarse sand, and are essentially gravel free. Dinuba soils are calcareous between depths of 20 to 40 inches and have silty unrelated sediments below the argillic horizon. Hanford soils lack an argillic horizon. Oakdale soils have a moist value of 3 and more than 1.2 percent organic matter to a depth of more than 4 inches. Ramona and Snelling soils have more than 18 percent clay in the argillic horizon.
GEOGRAPHIC SETTING: Greenfield soils are on fans and terraces at elevations of 100 to 3,500 feet. Slopes range from 0 to 30 percent. The soils formed in moderately coarse and coarse textured alluvium or some wind deposited material derived from granitic and mixed sources. The climate is dry subhumid mesothermal with hot, dry summers and cool, moist winters. The mean annual precipitation is 9 to 20 inches. The mean annual temperature is 60 to 64 degrees F.; the average January temperature is 42 to 46 degrees F.; and the average July temperature is 76 to 80 degrees F. The frost free season averages about 200 to 325 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing
Hanford,
Ramona and
Snelling soils and the
Arlington,
Docas,
Garey,
Lockwood, and
San Joaquin soils. Arlington and San Joaquin soils have duripans at depths of less than 40 inches. Docas soils lack argillic horizons. Garey soils have an argillic horizon consisting of lamellae and intervening sandy layers without clay bridges. Lockwood soils have a mollic epipedon.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderately rapid permeability.
USE AND VEGETATION: Used for the production of a wide variety of irrigated field, forage and fruit crops and also for growing dryland grain and pasture. Vegetation on uncultivated areas consists of annual grass, forbs, some shrubs and scattered oak trees.
DISTRIBUTION AND EXTENT: Interior and coastal valleys of central and southern California. The soils are extensive.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: DAVIS, CALIFORNIA
SERIES ESTABLISHED: Monterey County (Salinas Area), California, 1924.
REMARKS: The activity class was added to the classification in January of 2003. Competing series were not checked at that time. - ET
The last revision to the series was 1/2003. ET
National Cooperative Soil Survey
U.S.A.