A relative description of a lake's biological productivity based on the availability of plant nutrients. The range of trophic conditions is characterized by the terms of oligotrophic for the least biologically productive, to eutrophic for the most biologically productive.
Beta! The text on the eCFR tab represents the unofficial eCFR text at ecfr.gov.
This section’s status may have changed. It may have been renumbered, reserved, or removed.
This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.