THE THEORY AND PRACTICE OF WORKING PLANS 



125 



Method No. 12 is excellently suited for irregular and over- 

 mature selection forests. 



Method No. 13 is restricted to very intensive conditions. 



Method No. 14, variations I and III, for coppice and coppice 

 with standards, Var. II for intensive conditions. Chiefly used 

 as area check. 



Method No. 15, for even-aged stands of only moderate 

 regularity. 



Diagram E 



DETERMINATION OF CUT BY 18 DIFFERENT METHODS 

 BASED ON THE SAME PREMISES 



7,500 



<D 



3 7,000 

 m 



a 



I 6,500 

 §6,000 



,5,500 



.5,000 



.3 4,500 



4,000 



23,500 



3,000 



O 2v 



2,500 



2,000 



Method Number 2 3 4 ,5678 9, 10 11 12'ri2Yi'- U'T Un'riSY'lsYi'- 18 

 Simple form onlr '^°"'" 



Method No. i6, the ultima ratio of fairly regular, even-aged 

 stands. 



Method No. 17, the strait-laced period method of Europe; 

 not adapted to American conditions. 



Method No. 18, an American adaptation of the period 

 method for even-aged stands and those uneven-aged by groups 

 of even age. 



It is always advisable to calculate the annual cut by a 

 variety of methods so as to have a check on the figures. Both 



