An estimate of the maximum average annual rate, in tons per acre per year, of soil erosion by water that can occur without affecting crop productivity over a sustained period.
BOARD NOTE: Erosion Factor T for Illinois soils is available from the United States Department of Agriculture, Natural Resources Conservation Service, Illinois Office, 2118 W. Park Court, Champaign IL 61821, (217) 353-6676. The published soil surveys for Illinois are available at http://www.nrcs.usda.gov.
Ill. Admin. Code tit. 35, § 501.244