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Cases in which the fellings may properly be regulated by 

 cultural rules. — The cultural method of organizing selection- 

 •worked forests is especially applicable to the irregular and 

 partially-ruined condition so frequently to be dealt with 

 in the forests of India, where enumeration surveys would 

 often be waste of time and money. The method is also 

 applicable to forests in which it is merely desired to retain 

 the cover. In the latter case, the fellings would, of course, 

 be limited to the removal of dead or decaying trees. 



But the method enforced in the manner explained above 

 is attended with the drawback that there is no means, other 

 than by personal inspection, of checking its correct applica- 

 tion. The only extraneous control that can be exercised 

 over its application is with regard to the area exploited ; and 

 all the prescriptions on this subject might be rigidly adhered 

 to while the far more important cultural rules were being 

 misapplied by unintelligent or unscrupulous subordinate 

 officials. Hence, where possible, it is always preferable to 

 determine the quantity of material that may annually or 

 periodically be removed with safety, and to limit the fellings 

 to this maximum quantity while subordinating them to 

 cultural rules. 



Thus, suppose it -were ascertained by experiment that the average prodnotion of 

 a crop in its present condition was 30 to 40 cubic feet per acre per annum, and that 

 it was desirable to increase the forest capital, the fellings might be limited to 20 

 cubic feet per acre per annum on an average for the whole area, or, if the area were 

 1,000 acres, to 20,000 cubic feet. Tliis maximum amount could be felled in each 

 annual coupe. 



Limitation of fellings determined by the rate of growth.— 

 It was explained, when discussing at pages 5 and 6, the 

 formation of the forest capital, that, in a normal forest, the 

 number of trees which attain exploitable dimensions in a 

 given period practically represents the possibility of the forest 

 for that period. As it is possible to estimate, for a short 

 period in advance, the number of trees in a forest that will 

 become exploitable and to determine with some accuracy 

 whether the crop approaches the normal type or not, the 

 principle may, in some cases, be usefully applied to selection 

 working in forests in which the trees can be enumerated. 



Suppose a forest in which trees of all ages are well represented and fairly evenly 

 distributed, and in which the rate of growth is such that in the course of 30 years 

 trees of 4% feet girth attain the minimum exploitable girtb-hmit of 6 feet. In 

 the course of 30 years all the trees now 4,1 to 6 feet in girth would be removed. 

 Provided, therefore, that trees of all sizes now from 4^ to 6 feet girth were properly 

 represented in the crop, and were felled as they attained to 6 feet girth, the 

 annual possibility would theoretically amount to one-thirtieth of the total number 



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