fcORDER CUTTINGS 



151 



Since it is not intended for use in regenerating areas that are to be 

 cut over in less than four or five years, it, unfortunately, is not appli- 

 cable to the majority of Forest Service timber sales, unless there be 

 assurance that a given area of timber will afford a continuous cut for a 



64O Acres 



3.20O 

 boartf measus-e. 



Five-year cutting period. 

 Eight cutting series. 

 Each one-eighth mile apart. 

 Each cut per year, 80 M. 

 Total per year, 640 M = 20 %. 



A/ 



I 



Ten-year cutting period. 

 Four cutting series. 

 Each one-quarter mile apart. 

 Each cut per year, 80 M. 

 Total per year, 320 M 10 9 



Twenty-year cutting period. 

 Two cutting series. 

 Each half mile apart. 

 Each cut per year, 80 M. 

 Total per year, 160 M = 5 



Thirty-year cutting period. 

 One and one-third cutting series. 

 Each three-quarters mile apart. 

 Each cut per year, 80 M. 

 Total (per 640 acres) per year, 

 106 M = 3i %. 



longer period than that, and that the mills to which the logs go consti- 

 tute a steady, reliable demand for all the timber cut an the pei 

 regeneration. 



