36 



ECONOMICS OF FORESTRY. 



One-third of the land area, then, is incapable 

 of forest growth {iiot tree growth), 7 per cent is 

 unfitted for it, and 60 per cent must be divided 

 between farm and forest. How much is actually 

 wooded it is impossible even to estimate, and 

 how much contains available wood supplies, still 

 less so. 



The world's requirement of wood materials may 

 be estimated as follows, actual figures and statistics 

 in some cases allowing reasonable approximations, 

 but lacking, of course, for all oriental countries, 

 Africa, Australia, South America, any tangible 

 basis : for these, therefore, merely allowances by 

 guess are made : — 



This, for the 1,600,000,000 inhabitants, would 

 average about 38 cubic feet per capita, of wood of 

 all descriptions, of which 6 to 7 cubic feet are saw 

 material equivalent to 40 feet board measure. 



The following countries furnish about the fol- 

 lowing quota of the saw material : — 



