vi] METHODS OF TREATMENT 51 



be made by volume and be carried out in any part of the block 

 that is culturally fit for them, as in the ordinary Uniform method. 



Tabular statements will be drawn up for each kind of opera- 

 tion, showing year by year throughout the period what areas 

 have to be worked over, and rules will be framed to determine 

 the nature of, and mode of execution of, each kind of felling. 

 The whole operation is a cultural one, and considerable liberty 

 should be left to the local operator with regard to the application 

 of practical details. 



Then, in addition to the four kinds of principal fellings going 

 on in different parts of the area, there will also be subsidiary 

 tending operations in each part ; these will be cultural operations 

 of a nature suitable to the condition of the crops and to the 

 treatment that they are undergoing, and will be carried out with 

 a periodicity suitable to their light-requirements, their density, 

 composition, and condition. 



46. Conversion from Selection to Uniform. 



Conversion from irregular to regular high-forest is a process 

 that every even-aged high-forest now worked under the Uniform 

 method, or one of its variations, has had to pass through, since 

 the natural forest is always composed of crops of all ages mixed 

 up over the whole area and the even-aged condition is an arti- 

 ficial one. 



Under certain well-known conditions the Selection method is 

 a very excellent one, arid offers scope for intensive working, but 

 under other conditions, it is often desirable to introduce the 

 regular Uniform method in order to obtain the great advantages 

 that result from growing trees in close even-aged crops. 



Theoretically the irregular high-forest is supposed to be of 

 uniform irregularity all over, and one part is supposed to be 

 exactly like another. In practice, however, this uniformity .of 

 irregularity (if the phrase be permissible) will not be found, and 

 there will always be certain parts of the area containing a pre- 

 ponderance of old trees, other parts stocked principally with 

 middle-aged trees, and other parts consisting largely though 

 of course not exclusively of young growth. 



Now in order to create a regular equal graduated succession 



42 



