124 COMMISSION OF CONSERVATION 



part of the initial outlay may be neglected, as far as the Government 

 timberland is concerned. And for reasons already explained, the cost 

 of regeneration is low. Five dollars per acre is ample allowance for 

 both the cost of regeneration and the expense of brush-burning. Indeed , 

 it is twice what is allowed in Circular 175, U.S. Forest Service, for 

 similar conditions. 



Annual carrying charges consist of taxes, and expenses of protec- 

 tion and administration. Like the land value, taxes may be neglected 

 in dealing with Government land. Other expenses may be placed, 

 for the present, at 5 cents per acre per year. The proper rate of in- 

 terest to use for forestry calculations is a much debated point. In 

 Etirope where conditions are more stable and protection better assured, 

 the business obtains a low rate of interest, 2)4 per cent and 3 per cent, 

 because of its long-time, safe character. Here, however, probably 

 S per cent should be used, at least tmder present conditions. 



The number of years and the amount of yield are co-related and 

 depend chiefly on species, soil and climate. Here again, as already 

 stated, British Columbia is exceptionally favoured. The U.S. Forest 

 Service have estimated the growth rate for the Pacific forest to be twice 

 the average for the United States. The following yield table for Doug- 

 las fir is taken from Circular 175, U.S. Forest Service. It was pre- 

 pared from measurements taken by the U.S. Forest Service of prac- 

 tically pure fir on about 400 areas in 35 different age stands from 10 

 to 140 years old, ranging along the Western Cascade foothills from the 

 Canadian line to Central Oregon. The areas were selected as average 

 and typical of the better grade of the forest soU. 



Yield Table for Dotjolas Fib 



Age of Per Acre 

 Stand Feet, B.M. 



40 12,400 



50 28,000 



60 41,000 



70 51,700 



80 61,100 



90 70,200 



100 79,800 



110 90,300 



120 101,500 



130 113,000 



Assuming that, under natural conditions, the forest requires an 

 average of 5 years to become established, the above ages should be in- 

 creased by five years each to get the correct performance, so that, 

 for instance, a 5 5 -year-old stand would 3rield 28,000 ft. B.M. and a 

 50-year stand 20,500 ft. B.M. per acre. 



