/f73 



EPA-R1-73-001 



February 1973 





Environmental Health Effects Research Series 



WOOD8 HOLE ^^^SSmSS^ 

 ENVIRONMENTAL QUALITY REFERENCE OUU**» 



Plant Analysis for Nutrient 

 Assay of Natural Waters 



f* s % 



55 



532 



\ 



HI 



(3 



1113 



Office of Research and Monitoring 



U.S. Environmental Protection Agency 

 Washington, D.C. 20460 



