1^2"", THE GENERAL -WOEKING SOHEilHj 



The special circumstances just described are not the only onef 

 that are to be encountered in organising high forests. Every 

 Working Circle, however perfectly it may be constituted, cannot 

 but contain compartments of different degrees of fertility due to 

 differences of soil and situation. When these differences do not 

 affect their productiveness in any marked manner, or when it is 

 possible to distribute more or less equally, amongst the various 

 Blocks, compartments possessing the same degree of fertility, the 

 division is effected by equal areas. This is the most simple and the 

 most general case. When, on the contrary, one age-class, taken in 

 its entirety, occupies good rich soil, while another is similarly si- 

 tuated on poor soil, it is necessary to include in the corresponding 

 Blocks a larger area of the one than of the other. 



However it be, the distribution of the principaii exploitations and 

 of the estimated total yield among the various Periods of the Rota- 

 tion must always continue to be based on area. The result of this is 

 that the Working Scheme acquires thereby a degree of preeisiom 

 and stability, which enables its main lines to be laid out on th® 

 ground in a permanent manner. On paper it may be representesl 

 in a very simple tabular form, thus : — 



