69 



CHAPTER II— THE WORKING SCHEME AND THE 

 CALCULATION OE THE POSSIBILITY DIS- 

 CUSSED UNDER THE VARIOUS 

 METHODS OE TREATMENT, 



Section I. — •Pkeliminaky explanation. 



1. General arrangement followed.— The prescription oE tlie 

 possibility — the manner and locality in which it is to be 

 exploited — constitutes, practically speaking, the working 

 scheme for all forests of which the exploitable material is 

 wood ; and, as t^e manner in which the possibility is calcu- 

 lated depends on the method of treatment, it will be con- 

 venient to discuss separately the kind of working scheme 

 required under each of the following methods, namely — 



The method of simple coppice, 



„ „ „ Doppice-selection, 



„ J, J, braneh-coppice, 



„ ,. „ coppice with standards, 



„ ,1 „ clearances, 



„ „ „ storejred. forest, 



„ „ „ selection, 



„ „ „ successive regeneration fellings, 



„ „ „ pastoral treatment. 



This will be done in regular order, the coppice methods, 

 as the simplest, being considered first. The manner of pre- 

 scribing the provisional treatment that crops may and usually 

 do require, transformation aad restoration fellings, prepara- 

 tory thinnings and other improvement fellings, in order to 

 apply these methods, will also be dealt with in describing 

 the nature of the working scheme for each. 



Before dealing with these methods in detail some preli- 

 minary explanations are, hovrever, necessary. 



3. Manner in which the possibility is prescribed.— It has 

 already been explained that the possibility may be prescribed 

 in three ways, viz., by area, by number of trees, or by volume 

 of material, and that either of the two latter may be com- 

 • bined with the former. Practically speaking this is Avhat is 

 always done, and the possibility is expressed by prescribing 

 tbe felling, under certain sylvicultural rules, of the crop,, or 

 of a limited number of trees or volume of material in a 

 given area. 



