THE THEORY AND PRACTICE OF WORKING PLANS 



63 



Years. 



Norway Spruce. 



Best Medium 

 Sites. Sites. 



Poor 

 Sites. 



White Fir. 



Best 

 Sites. 



Poor 

 Sites. 



Scotch Pine. 



Best 



Sites. 



Poor 

 Sites. 



Dollars per Acre. 



Beech. 



Best 

 Sites. 



Poor 

 Sites. 



30 



40 



SO 



60 



70 



80 



90 



100 



no 



120 



51 



100 



139 

 159 

 166 

 161 

 151 



138 



126 



117 



-19 



- 4 

 6 



7 

 7 

 4 

 2 

 2 



- 2 



- 4 



From this table it is evident that for Norway spruce, medium 

 sites, the financial rotation chosen on the basis of soil rent 

 would be 70 or 80 years; for white fir 70 years; for Scotch 

 pine 60 years; and for beech 60 or 70 years. 



The financial rotation will undoubtedly be used more and 

 more in the future especially as the necessary data become 

 available. " In any ordinary forest business the aim is to 

 keep the forest and land in best possible condition and at the 

 same time make the largest income. Assuming the silvi- 

 cultural conditions cared for, the best rotation is the one fur- 

 nishing the best income for the longest time. There are two 

 distinct ways of judging this income. 



" (i) . . . the largest net income per acre of estabhshed 

 forest." (Forest rent.) 



" (2) . . . the largest per cent on the money invested in 

 the forest." (Soil rent.) * 



The kind of rotation to adopt depends on matters of policy, 

 to wit: 



1. Conditions of ownership, wishes and purpose of owner. 



2. The market and logging conditions. 



*Roth: "Forest Valuation," p. 85. 



