CLEAR CTTTTINrx IN HiriH FOREST. 299 



cuttings. This includes the woods which will become 

 ripe during the working plan period. 



The sum total of the cuttings indicated under these three 

 headings represents the final yield to be assigned to the period, 

 for which the working plan is prepared. 



For small forests, or those where a sustained annual or 

 periodic yield is not called for, nothing further is required. It 

 is different in the case of extensive areas especially those, 

 where considerations for a steady annual income, for the 

 regular supply of markets, or the occupation of the staff 

 and workmen necessitate an approximately even annual out- 

 turn. Here the yield, as determined above, must be subjected 

 to a modifying regulator, either as regards the area to be 

 cut or the volume to be removed during the working plan 

 period. 



This regulator can take any suitable shape, such as the size 

 of the mean annual or periodic coupe, or the yield calculated 

 according to volume. Judeich prefers the mean annual 

 coupe, as obtained by dividing the total area by the fixed 

 rotation. If a forest has an area of 2,000 acres and is 

 worked under a general rotation of 80 years, the mean 



annual coupe would be equal to ^^^— — = 25 acres. During a 



80 



working plan period of 10 jesn's the normal cutting area for it 



would amount to 25 X 10 = 250 acres. In other words, 



during a period of 10 years 250 acres should be cut over, and 



the areas selected for cutting should be brought within that 



limit. This, however, is only desirable, if the proportion of the 



age classes is fairly normal. In all cases, where considerable 



deviations from the normal proportion exist, such a narrow 



limit cannot be drawn, because in some cases it is highly 



desirable to cut more than the normal area ; if, for instance, 



too large a proportion of old or defective woods exist. In other 



cases, the cuttings should be below the normal area, if, for 



instance, the area of mature woods is deficient. Hence, the 



regulator should give merely the maximum and minimum 



