110 PRACTICAL FOREST MANAGEMENT. 



locality. This sounds simple and would be so were it not for tho 

 following complications : 



' There are three classes of produce, sal, kokat, and fuel, which 

 requires a different period in which to mature, and where there is 

 for example, a heavy demand for fuel, which matures in 20 

 years, it is obviously impossible to restrict the supply by working 

 it on the 80 year rotation required by the sal growing over it. 

 Each class of produce must therefore be worked on its own rota- 

 tion, viz., 20 years for fuel, 40 years for kokai and 80 years of sal. 

 As all three classes grow mixed together the coupes correspond- 

 ing to these three rotations will be made simultaneously in the 

 same felling series. 



" In each felling series then, the following clearfellings are 

 prescribed each year : (A) sal to be clearfelled over one-eightieth 

 of the whole area of the felling series, (B) kokat to be clearfelled 

 over one-fortieth, and (C) fuel to be felled over one-twentieth. 

 In the sal clearfelling coupe all the kokat and fuel is also to be 

 felled and in the Jcokat clearfelling coupe all fuel is to be felled so 

 that the above felling areas (A, B-and C) actually overlap, the sal 

 clearfelling coupe including half the kokat and quarter of the fuel 

 clearfelling, and the kokat clearfelling coupe including a further 

 quarter of the fuel clearfelling. The actual areas occupied by the 

 different kinds of coupes therefore are 



"The sal coupe (including kokat and fuel fellings), one-eightieth 

 of the felling-series. 



" The kokat coupe (including fuel fellings), an additional 

 oneeightieth of the felling -series. 



"The fuel coupes an additional one-fortieth of the felling series. 



It is not strictly accurate to call the kokat and fuel coupes 

 ' clearfellings '| because, in the former, sal and in the latter sal 

 and kokat are left standing, but the term is convenient to distin- 

 guish the'fellings^here described from "the selection fellings described 



later. 



" The second complication arises from the fact that mature and 

 over-mature trees of the more valuable species as well as Jcokat 



