766 



EIGHT]! PACIFIC SCIENCE CONGRESS 



19-90 



I9-80 - 



!970 - 



I 19-60 h 

 a. 



O 



-I 



X 



u 



I9-50 - 



19 40 



I9-30 



5 10 15 20 25 



INORGANIC PHOSPHATE R 



FiGur.E 11 



30 



35 



