■Stco 



• Bogr 



900-1 



800- 



700- 



600- 



500- 



400- 



300- 



200- 



100- 



700-1 



600- 



500- 



400- 



300- 



200- 



100- 



> •— 



T 



T 



T 



T 



T 



T 



1977 1978 1979 1980 



1977 1978 1979 1980 



Figure 8. Net aerial production of two 

 grasses in the Stco/Bogr-Caf i 

 community, 1977-1980. 



Figure 9. Net aerial production 

 of three species in 

 the Bogr-Cafi/Stco 

 community, 1977-1980. 



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