A NATIONAL PLAN FOR AMERICAN FORESTRY 



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one third the number of trees present in the better stocked stand. 

 In both cases there is a moderate representation in the small timber 

 group (6 to 12 inches diameter), very little in the medium timber 



FIGURE 15. Distribution of cubic volume by diameter classes on average acre longleaf and slash pine 

 stands in naval-stores region. A, Average stocked stand based on sampling of 150,000 acres in Florida, 

 said to be representative of 20,000,000 acres; B, better stocked stand based on inventory of 200 acres and 

 said to be representative of 1,000,000 acres. Only a moderate permanent growing stock is recommended, 

 owing to naval stores yields being higher from well-spaced trees. 



group (14 to 20 inches diameter), and no large timber (22 inches 

 diameter and larger). 



Authorities hold that considerable areas of longleaf pine sites are 

 too poor and the stands on them too badly depleted to warrant 



FIGURE 16. Distribution of cubic volume by diameter classes on average acre in river-bottom hardwoods, 

 based on strip tally of 10,000 acres, considered to be typical of about 25 percent of the 23,070,000 acres in 

 this type. 



operation by private capital. On good sites, with inadequate seed 

 trees, planting is the proper procedure. This involves waiting a long 

 time for returns except where plantations are a part of otherwise 

 timbered properties. 



