200 



NITROGEN, PHOSPHORUS AND POTASSIUM 



O 



a 

 o 

 o 



O 



o 



a 



> 

 O 





■ a 



03 



CO fl 



JS 2 

 o _ 



^ CQ 



1 



a 



o 



o 

 a 



e3 



03 

 P. 



03 



O 



a 

 o 



P5 



CO 



H 



