Part I.] 
Troup : Teak Forests of Burma. 
29 
CHAPTER V. 
Yield and Outturn of Teak Forests in Burma. 
1. General. 
The present chapter deals with the estimated yield of the various teak 
forests in Burma, as calculated in the working-plans, and the actual yield 
and outturn as recorded in the control forms. There are, however, a few 
preliminary matters to be considered regarding the manner in which the 
yield is fixed and the system of management under which the forests are 
worked. 
With the three exceptions noted below, in all working-plans now in 
System of Management, operation the system of management, so far as 
(l) Selection. teak is concerned, is the selection system, this 
system being perhaps the only one which could be applied as a tem¬ 
porary means of working the large tracts of teak forest in Burma. 
The disadvantages attending this system, particularly as regards the 
conduct of operations for assisting natural reproduction and for encour¬ 
aging the growth of teak against inferior species, have, of late, com¬ 
manded a certain amount of attention, and in a revised working-plan 
for the Mohnyin reserve, which will come into operation shortly, the 
method of successive regeneration fellings will be introduced. This 
may be regarded as a preliminary step towards the introduction of more 
systematic methods of working the teak forests of Burma. 
In the rough working-plans for the Taungdwingyi and Madaya forests, 
(2) improvement fellings. a “ d * n the ™wiring-plan of the Tonkan reserve, 
which can hardly be termed a teak forest, the 
system of working prescribed is improvement fellings in the interests of 
teak, no yield by number of trees being fixed. 
The periods of the teak working-plans vary from 20 to 40 years, with 
Periods ami sub-periods. * he , exce P tion of the Mohnyin working-plan 
hitherto in force, which has a period of 15 
years, terminating in 1910. More than half the existing working- 
plans have periods of 30 years. 
Annual coupes would be impracticable in the teak forests of Burma, 
because the collection of timber-dragging elephants and labour, and the 
organization of the work, is a large business, which could not be trans¬ 
ferred from coupe to coupe each year. For this reason 4 4 sub-periodic 55 
and not annual felling areas are prescribed, and the period of the 
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