Part IV.] Caccia : Selec.tion method of treatment in India. 369 
normal capacity; this obviously requires a determination of the possibility of 
the forest as it is at present. 
According to para. 27 the number of sound teak of the first three classes 
now standing on the ground is — 
T Class (7 feet and over) . ..... 67,973 
II „ (6 to 7 feet) 38,092 
III ,. (4.^ to 6 feet) 64,338 
These will not all survive to be girdlod, and we will assume that they will 
survive to be girdled in the following proportions : — 
Class. 
95 per cent, of the ........ I 
85 ditto . . . . . . .II 
70 ditto ........ Ill 
and we then get the following as the number of trees that will survive to be 
girdled ; — 
I Class . . . .... 64574 
ir „ . . 32,378 
III „ . . . 45,037 
In paragraph 32 it was shown that it takes 30 years for a tree of the lowest 
dimensions of the II Class to attain to the lowest dimensions of the I Class. 
Therefore at the end of the first period (30 years) 64,574 + 32,378 = 96,952 trees 
would have become exploitable, or annually 3,232. The annual increment of 
the forest, which normally would be its annual yield, is the number of II Class 
32 378 
trees which annually become exploitable, that is =1,079; and this 
shows that there is a large surplus on the ground. ^Moreover, it can be seen 
from the number of III Class trees, namely, 32,954, which pass into the 
II Class during the first period, that it is about the proper increment of the 
forest as at present constituted. As the whole area is not taken in hand at 
once but an area whose capacity is one-thirtiath of the total capacity of the 
forest, there must always be on the ground at the end of the period^ >■ 1,079 
16,185 exploitable trees. The surplus therefore will be 64,574 — 16,185 = 48,389 
trees. If these were removed during the first period, there would be a grea\. 
drop in the yield in the second period, and it is therefore proposed to spread 
their removal over about 2 periods (60 years) which would give 806 trees 
annually and a total annual yield 806+1,079 = 1,885 trees, or, in round numbers, 
it would be safest to say 1,800 trees. 
This yield and the order in which the girdlings are to be made are only 
prescribed for a period of 30 years. At the end of this time the plan must bo 
revised and the yield and girdlings altered and re-arranged if it is found necessarv. 
To estimate the condition of the crop at the end of this period we will 
assume that 50 per cent, of the IV and 25 per cent, of the V Class dominant 
will survive to be girdled, and we then see that the crop will be composed as 
follows : — 
I Class 96,952—54,000 = 42.952. 
IT H of 45,037=32,954 
HI 12,083+19 of 56, 7'<7 = fi3.708. 
IV „ . .... 5.102+9° of 71,466-39,193. 
It will be seen from this that there will be sufficient I and IT Class tiees 
to maintain the yield, while the number of III Class trees has greatly increased. 
The number of IV Class trees looks small, but it is impossible to say with any 
o 2 
