LOCATION CORCEGA PREstablished Series
TAXONOMIC CLASS: Fine-loamy over sandy or sandy-skeletal, mixed, semiactive, nonacid, isohyperthermic Fluvaquentic Endoaquepts
TYPICAL PEDON: Corcega silty clay loam - sugarcane. (Colors are for moist soil.)
Ap--0 to 8 inches; dark brown (10YR 4/3) silty clay loam; weak medium granular structure; firm, slightly sticky, slightly plastic; many fine roots; slightly acid; clear smooth boundary. (6 to 12 inches thick)
B2--8 to 14 inches; dark brown (10YR 4/3) silty clay loam with common fine prominent yellowish red (5YR 4/6) and few fine distinct light gray (10YR 7/2) mottles; weak fine subangular blocky structure; firm, slightly sticky, slightly plastic; common fine roots; common fine black concretions; slightly acid; clear smooth boundary. (5 to 8 inches thick)
B3--14 to 32 inches; dark gray (10YR 4/1) sandy clay loam with common fine distinct reddish brown (5YR 4/3) and common fine distinct gray (10YR 5/1) mottles; weak medium subangular blocky structure; firm, slightly sticky, slightly plastic; common fine black concretions; few fine roots; slightly acid; clear smooth boundary. (13 to 20 inches thick)
IIC--32 to 50 inches plus; dark gray (10YR 4/1) sand; single grain; loose, nonsticky and nonplastic; slightly acid.
TYPE LOCATION: Oeste SCD, Puerto Rico; 2 miles west of the town of Anasco; 40 meters west of kilometer marker 2.0 on Highway 115.
RANGE IN CHARACTERISTICS: Depth to the sands varies from 24 to 40 inches. Depth to water table varies from 10 to 36 inches.
Colors of the A horizons have hues of 10YR and values of 3 and 4.
The B horizons have colors in hues of 10YR, values of 4 and chromas of 2 and 4. The B horizons have few to common mottles of yellowish red, reddish brown, light gray and gray colors. Structure of the B horizons ranges from weak fine to medium subangular blocky.
The C horizons have colors in hues of 10YR and 2.5Y, values of 4 and chromas of 1 and 2 and mottles of reddish brown, yellowish brown and gray colors. Silty clay loam is the dominant type. These soils have slightly sticky and slightly plastic sola. Reaction ranges from slightly to medium acid.
COMPETING SERIES: These are the Maunabo, Vayas, Fortuna, Playa, Bajura, Santoni, Josefa, Talante, Coloso, and Pinones series. The Maunabo and Fortuna soils are acid, lack the sandy C horizons, and are finer textured throughout. The Playa, Bajura and Santoni soils are darker, finer textured, and have low chroma mottles higher in the profile. The Josefa soils are more acid. The Vayas soils are finer textured throughout and saline in the lower horizons. The Coloso soils are finer textured and do not have sandy C horizons. The Talante soils are more acid. The Pinones soils have buried organic materials within 20 inches of the surface.
GEOGRAPHIC SETTING: The Corcega soils occupy nearly level areas in the river flood plains. The regolith consists of moderately fine textured sediments of mixed origin over sands. The climate is humid tropical. The average annual rainfall is 80 inches and the mean annual temperature is 78 degrees F. Mean annual soil temperature at 20 inches is more than 71.6 degrees F. with less than 9 degrees F. difference between mean summer and mean winter temperature.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Playa, Bajura, Santoni, and Coloso series in addition to Toa and Dique soils both lacking low chroma mottles in the upper profile and the sands in the C horizons.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained, runoff is slow and permeability is moderate.
USE AND VEGETATION: Sugarcane.
DISTRIBUTION AND EXTENT: Humid river flood plains of Puerto Rico. The series is of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Puerto Rico; 1942.
REMARKS: The Corcega series was formerly classified in the Alluvial Great Soil Group. It is being revised and placed in the New System of Soil Classification.