82 



Another process based on tables showing the yield of dif- 

 ferent classes of forest and soil need not here be dealt with, 

 as no such tables for Indian forests exist. 



It may be useful to note that in applying these methods, the yield need not as is 

 frequently done be separately calculated for each species. The enumeration would 

 show the relative proportion of each species ; and in the working-plan the fellings 

 of each may be prescribed according to that proportion. Thus, suppose that | of 

 the trees enumerated were of species A, and % of species B, and that the possibility 

 were fixed at, say, 600 trees a year, the plan might prescribe the felling of 200 trees 

 of species A and 400 of species B. 



Fellings limited by cidtural rules.— -The cultural rules 

 prescribing the method of making the fellings should be 

 easy to understand and of general application ; and they 

 should also ensure that, as far as possible, more material 

 than the forest produces will not be removed. Where the 

 demand and consequently the fellings are very light nothing 

 more is required than to fix the diameter below which trees 

 must not be felled, or to limit the fellings to the removal, 

 here and there, according to the principles of the selection 

 method, of such trees as are over-mature or are above a 

 certain girth. 



Such general rules sufficiently limit the fellings where 

 the crop is already constituted according to the selection 

 type or where there is a good executive staff. But where, 

 as often happens, this is not the case, there is danger of such 

 simple rules being unintelligently or unscrupulously applied. 



To meet this difficulty it is well, when dealing with large irregular forest masses, 

 to supplement, as in the following example, the general rules by hints or directions, 

 conveyed in the " Bemarks " column of the description of each block, legarding the 

 nature of the fellings to be made : — 



Description of compartments. 



