CARBON FERTILIZATION EFFECTS IN A SIMULATED ECOSYSTEM 331 



Load BLKDTA 



Simulation 



Control Data 



JABOWA 

 The Main Program 



100 



Call QUERY 



displays parameter 



and program 



information 



0< Kfirst <208 

 i 



Call PLOTIN 



inputs a set of 



Hubbard Brook 



plot data 



10 



Call SITE 



estimates site 



quality parameters 



Call OUTPUT 



prints the year 



zero stand 



Call INIT 

 returns to year 

 zero condition 



Call LOAD 

 Dummy 

 Plot Data 



Call BIRTH 

 introduces new 

 saplings to stand 



Call KILL 



kills some trees 



from stand 



Call GROW 



grows the 



remaining stand 



Yes 



No 



KPNT 

 a multiple of i 



No 



Call OUTPUT 



prints the it h year 



stand 



Log <0 



Call CUT 



cuts over stand 



down to diameter 



limit of size Log 



No 



sequential run for 



this plot^-^ ii < KTIMES 



Yes ii = KTIMES 



Last ^. No 



plot to process? >— — ► 



KSTART 

 <KLAST 



Yes I KSTART = KLAST 



END 



Fig. 1 Flow chart of JABOWA, Version 1 [D. B. Botkin, J. F. Janak, and 

 J. R. Wallis, Rationale, Limitations, and Assumptions of a Northeastern Forest 

 Growth Simulator, IBM Journal of Research and Development, 16(2): 

 101-116(1972)]. 



