Lower 



* 



>> 

 i_ 



■o 



T 

 O 



o 



a. 



\- 

 < 



3 14 



1.2 



1.0 

 0.8 

 0.6 

 04 

 0.2 



JAN FEB MAR APR MAY JUNE JULY AUG SEPT 



Figure 7. Microbial biomass (ATP) in nonplanted plots. See Figure 5 for details. 



44 



