THE THEORY AND PRACTICE OF WORKING PLANS 



63 



Norway Spruce. 



Best Medium Poor 

 Sites. Sites. Sites. 



Best Poor 

 Sites. Sites. 



Scotch Pine. 



Best Poor 

 Sites. Sites. 



Best 

 Sites. 



Dollars per Acre. 



Poor 

 Sites. 



30 

 40 

 50 

 60 

 70 

 80 

 90 

 100 

 no 



139 



159 

 166 

 161 

 151 

 138 

 126 



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 established 

 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 poHcy, 

 to wit: 



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



2. The market and logging conditions. 



Roth: "Forest Valuation," p. 85. 



