Submitted to: Watershed Management Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: August 18, 1995
Publication Date: N/A
Technical Abstract: Nonpoint source pollution that emanates from agricultural lands is difficult to quantify and difficult to assess in terms of particular farming practices that contribute to the problem. In 1990 a monitoring effort began on Walnut Creek watershed near Ames, IA, to observe the seasonal trends in nitrate-nitrogen and herbicide lost and to determine potential alternatives in watershed management that would be needed to address these problems. Nitrate-N and herbicide losses are dependent upon the rainfall patterns throughout the year and herbicides are dependent upon rainfall events shortly after application. To reduce nonpoint source pollution will require an integrated approach to blend onsite and offsite movement into a management scheme for an entire watershed.