16 



the period taken in transition by each species is less than 40 years, a portion 

 of the lower class will also pass over to class II, the actual proportion being 

 regulated by the period taken by each individual species to pass from the lower 

 to the higher class. 



64. Deducting the percentage of trees lost in transition and taking 40 per 

 cent, as the number of unsound Matti that will produce timber, the following will 

 be the number of stems of each species available during the 2nd felling period: 



15 



Sound Matti ... | (8,448 20%) +(14.623 42%) +24 (21,303 31%)=13,904. 



2 



Unsound Matti^[|(8,l72 20%) +(9.847 17/ ) +24(1 0.184 3l/ o | =4,831 



Nana f (7,262 2Q / Q )+(10,019 27/ )+29' (13,158 24/ a )=8,877. 



2 



18 



Kindal ...g (20,95120%) + (27.658 24/ H20 (35.682-2^)^36,609. 



2 



Jamba ...f (7,194 20%)+ (15,678 54/ )+2a (28 > 239-44/ c> )=ll > l57. 



2 



65. In comparing the yield estimated for the 1st felling period with that 

 of the 2nd we get the following results : 



The calculation for the first three species may be taken as more or less 

 correct, while the calculation for Jamba cannot be relied upon, because the 

 percentage of loss during transition as calculated from actual figures does not 

 represent normal conditions, Jamba being the species of which much small wood 

 under exploitable girth has been cut in past years, thus increasing the percentage 

 to be deducted from the actual figures. Otherwise the number shown in column 

 3 would have been much higher. 



Z>. Supplementary Provisions. 



66. The improvement fellings will be carried out in four different places ; 

 thus one improvement felling in each block will follow closely after the major 



fellings, and the other two improvement fellings will 

 The improvement fellings. start in ^ Q centre of each block and proceed in advance 



of the major fellings. In this way when the major fellings have progressed for 

 20 years, the two advance improvement fellings will have reached the end of each 

 block. By starting again from where they began they will fall in line behind 

 the major fellings, while the other two improvement fellings which followed the 

 major fellings during the first half of the felling period will re-start at the 

 beginning and go over the first half of the area a second time, 



