118 R. T. Prentki et al. 





16 



I4|- 



12 



10 

 8- 

 6- 

 4- 



c. Particulate phosphorus 



\I97I 



1970, 



■20 



Moy 



10 20 

 Jun 



10 20 

 Jul 



10 20 

 Aug 



Sep 



10 



FIGURE 4-16. Concentration of phosphorus in Pond B, 1970-1971. 



