240 



O 



oo 



an 



< 



LLJ 



ac 

 < 



< 

 < 



□3 



180 



120 



60 



8h 



_L 



20 40 



STAND AGE (YEARS) 



60 



I 6 



< 



a 



z 

 < 



i— 



< 



OH 



> 



< 



PLANTATION 



_L 



JL 



20 40 60 



STAND AGE (YEARS) 



Z5 

 U. 



LU 



an 

 U 

 < 



o 



> 



CO 



< 



I— 



z 

 < 



u 



ac 



3750 





1 

 1 



3000 



PLANTATION / 







1 







1 







1 







1 







1 



2250 





I / 







/ / 

 / / 



1 1 



1500 





#/ 



It 



If 



750 



/l 



// 

 it 



' / 



i i 



50 



20 40 



STAND AGE (YEARS) 



60 



Q 

 on 



o 



u 



U 

 < 



40 



30 



O 

 > 



GQ 



< 



I— 



z 

 < 



x 

 u 



on 



20 



10 



I 



PLANTATION 



20 40 



STAND AGE (YEARS) 



Figure 1. — Growth characteristics of an unmanaged 

 red pine plantation and natural stands; site index 50. 



60 



* 





