ASTM International - ASTM D6146-97
Standard Guide for Monitoring Aqueous Nutrients in Watersheds
|Publication Date:||10 June 1997|
1.1 Purpose- This guide is intended to provide general guidance on a watershed monitoring program directed toward the plant nutrients nitrogen and phosphorus. The guide offers a series of general steps without setting forth a specific course of action. It gives assistance for developing a monitoring program but not a program for implementing measures to improve water quality.