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S< 

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 CQ i) 



_ a. 



.y ^ 



.2 > 

 « 



D. 



Site 

 Index 



80 



70 



60 



90 120 150 180 210 240 



Total Basal Area Per Acre (Square Feet) 



Figure 4, Periodic Net Annual Board-fool Volume Growth Expressed 



as a Function of Site Index and Basal Area I*cr Acre at Age 50 



and 70 Percent Basal Area in Sawlimber 



270 



