LOCATION REXFORD PA
Established Series
Rev. BHC-GDM
07/2011
REXFORD SERIES
The Rexford series consists of very deep, somewhat poorly drained to poorly drained soils on terraces and moraines. They formed in glacial outwash or stream terraces derived mainly from sandstone and shale. Slopes range from 0 to 15 percent.
TAXONOMIC CLASS: Coarse-loamy, mixed, active, mesic Aeric Fragiaquepts
TYPICAL PEDON: Rexford silt loam-cultivated. (Colors are for moist soil.)
Ap--0 to 8 inches; dark grayish brown (10YR 4/2) silt loam; weak fine granular structure; very friable, slightly sticky, slightly plastic; many fine roots; 10 percent rock fragments; slightly acid, abrupt wavy boundary. (6 to 10 inches thick)
Bw--8 to 12 inches; yellowish brown (10YR 5/4) loam; common fine distinct grayish brown (10YR 5/2) mottles; weak fine subangular blocky structure; friable, slightly sticky, slightly plastic; many fine roots; 10 percent rock fragments; moderately acid; clear wavy boundary. (2 to 6 inches thick)
Bg--12 to 17 inches; grayish brown (10YR 5/2) loam; common fine distinct yellowish brown (10YR 5/6) mottles; weak fine and medium subangular blocky structure; firm, slightly sticky, slightly plastic; common very fine roots; 10 percent rock fragments; moderately acid; gradual wavy boundary. (3 to 12 inches thick)
2Bx1--17 to 30 inches; brown (7.5YR 5/4) gravelly loam; many fine distinct gray (10YR 6/1) and strong brown (7.5YR 5/6) mottles; moderate very coarse prismatic structure parting to moderate medium and thick platy; very firm, brittle, slightly sticky, slightly plastic; few faint clay films in pores; 25 percent rock fragments; strongly acid; gradual wavy boundary. (8 to 20 inches thick)
2Bx2--30 to 38 inches; brown (7.5YR 4/4) gravelly loam; many coarse prominent light gray (10YR 7/2) and strong brown (7.5YR 5/8) mottles; moderate very coarse prismatic structure parting to moderate thick platy and weak fine subangular blocky; very firm, brittle, slightly sticky, slightly plastic; very few faint clay films in pores; 15 percent rock fragments; strongly acid; abrupt wavy boundary. (5 to 12 inches thick)
2C1--38 to 44 inches; brown (10YR 5/3) very gravelly sandy loam; massive; firm, nonsticky, nonplastic; 40 percent gravel; strongly acid; abrupt wavy boundary. (0 to 30 inches thick)
2C2--44 to 60 inches; olive brown (2.5Y 4/4) stratified sand and gravel; single grain; loose; strongly acid.
TYPE LOCATION: Tioga County, Pennsylvania; Covington Township, about 3 1/2 miles south of Mansfield, about 0.4 miles east of intersection of PA 660 and US 15.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 24 to 50 inches. Depth to bedrock is more than 60 inches. Depth to stratified sand and gravel ranges from 35 to 72 inches. Depth to the fragipan ranges from 15 to 24 inches. Rock fragments range from 0 to 40 percent in A, B and Bx horizons and from 15 to 75 percent in the C horizon. Unlimed, the reaction ranges from very strongly to moderately acid above the fragipan and from strongly to slightly acid in the C horizon.
The A horizon has hue of 7.5YR through 2.5Y, value of 3 or 4, and chroma of 1 or 2. It is sandy loam, loam or silt loam in the fine-earth.
The B horizons have hue of 7.5YR through 2.5Y, value of 4 through 6, and dominant chromas of 1 or 2, with individual horizons with chroma 3 to 6 and are mottled. The Bw horizon of some pedons are free of mottling. The B horizons above the fragipan are sandy loam, loam or silt loam in the fine-earth.
The Bx horizons have hue of 5YR through 5Y, value of 4 through 6, and chroma of 1 through 4. They have both high and low chroma mottles. They are sandy loam, loam, or silt loam in the fine-earth. The secondary structure in some pedon is subangular blocky.
The C horizon has hue of 5YR through 5Y, value of 4 or 5, and chroma of 3 to 6. It is silt loam, loam or sandy loam in the fine-earth and ranges to stratified sand and gravel.
COMPETING SERIES: The
Morris and
Scriba series are in the same family. The Morris and Scriba soils do not have stratified material within the series control section.
Atherton,
Braceville,
Erie,
Fredon,
Halsey,
Phelps, Red Hook and
Volusia series are in related families. Atherton, Fredon, Halsey, Phelps and Red Hook soils do not have fragipans. Braceville soils do not have dominant chroma of 2 or less on ped faces within a depth of 20 inches. The Erie and Volusia soils have more than 18 percent clay within the series control section.
GEOGRAPHIC SETTING: Rexford soils are on nearly level to strongly sloping glacial outwash or stream terraces and water sorted moraines. Slopes range from 0 to 15 percent. The soils developed in water sorted materials derived largely from gray sandstone and shale. Climate is humid temperature with mean annual precipitation of 34 to 45 inches; mean annual temperature ranges from 45 to 52 degrees F., and the frost-free season ranges from 120 to 170 days.
GEOGRAPHICALLY ASSOCIATED SOILS:
Atherton,
Braceville,
Fredon,
Halsey,
Phelps, Red Hook,
Alton,
Chenango,
Howard and
Tunkhannock soils are formed in glacial outwash and the
Barbour,
Pope and
Tioga soils are on nearby floodplains. None of these soils have fragipans.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained to poorly drained. Runoff is slow to medium; permeability is slow in the fragipan.
USE AND VEGETATION: Most areas are cleared and used for hay and grain crops and pasture. Smaller areas are woodlands with stands dominantly of mixed northern hardwoods.
DISTRIBUTION AND EXTENT: Pennsylvania. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Amherst, Massachusetts
SERIES ESTABLISHED: Venango County, Pennsylvania, 1971.
REMARKS: The Rexford soils were formerly in the Red Hook and Fredon series.
National Cooperative Soil Survey
U.S.A.