EPA-R1-73-001. 

 February 1973 



PLANT ANALYSIS FOR NUTRIENT 

 ASSAY OF NATURAL WATERS 



By 



Gerald C. Gerloff 

 Department of Botany and 

 Institute of Plant Development 

 University of Wisconsin 

 Madison, Wisconsin 53706 



Project 18040 DGI 



Project Officer 



Dr. Gary Glass 

 National Water Quality Laboratory 

 6201 Congdon Blvd. 

 Duluth, Minnesota 55804 



Prepared for 



OFFICE OF RESEARCH AND MONITORING 

 U.S. ENVIRONMENTAL PROTECTION AGENCY 

 WASHINGTON, D.C. 20U60 



For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 

 Price 95 cents domestic postpaid or 70 cents GPO Bookstore 



