US Army Corps of Engineers
Portland District Website Website


Graph showing nitrogen impacts over years from 1900 to 2000Agriculture is the cultivation and harvest of plants and animals for human use.


The figure at right shows a period of increase in coastal eutrophication in relation to global additions of anthropogenically-fixed nitrogen (Boesch 2002).


Controlling factors affected by agriculture:

Contact information

Ronald Thom, Ph.D

Marine Research Operations, PNNL
1529 W. Sequim Bay Rd.
Sequim, WA 98382