Port -- Oklahoma State Soil

Photograph of landscape of Port soil series.

Photograph of the profile of a typifying pedon of Port soil series.

Port Soil Profile

Surface layer: dark reddish brown loam
Subsurface layer: reddish brown silt loam
Subsoil - upper: reddish brown loam
Subsoil - lower: red very fine sandy loam

The Port series consists of very deep, well-drained, moderately permeable, nearly level and very gently sloping soils on flood plains that are subject to frequent, occasional, or rare flooding. These soils are in western and central Oklahoma. They are in 33 of the 77 counties and make up about 1 million acres.

These soils formed in calcareous, loamy alluvium and under native grasses. A high volume of organic matter recycled in a grass ecosystem has resulted in good soil structure and tilth. Most areas of the soils are used as cropland. The main cultivated crops are alfalfa, wheat, grain sorghum, and cotton. Some areas are used as pasture or rangeland.

The Port series was established in 1942 and is named after the small community of Port, Washita County, Oklahoma. The series was added to the list of official State symbols by the Oklahoma Legislature in 1987.

Small scale map of Oklahoma and adjacent states showing distribution of Port soil series.

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD).