350 
Indian Fotest Records. 
[VOL. 1. 
The growing stock may be divided into the following classes : — 
I Class trees having 24 inches diameter in dry forest. 
I Class trees having 26 inches diameter in moist forest. 
II Class trees between 18 inches and 24 inches diameter in dry forest. 
II Class trees between 18 inches and 26 inches diameter in moist forest. 
III Class trees between 12 inches and 18 inches diameter. 
IV Class trees below 12 inches diameter. 
About one-third of the teak-producing area in the working circle may be 
taken as covered with moist forest and two-thirds with dry forest. Of the 
10,440 trees between 24 and 30 inches in diameter tw’o-thirds or 6,960 may be 
taken as growing in dry and one-third or 3,480 in moist forest. Of these 3,480 
trees, granted that one-third or 1,160 are between 24 and 26 inches in diameter, 
they will not therefore be I Class trees. The proportion of 1,160 to 18,160, the 
total number of trees above 24 inches in diameter, is about one-fifteenth, hence 
it may be taken for granted that only fourteen-fifteenths of the trees over 24 
inches in diameter will be I Class trees. 
The classified growing stock will then be as follows : — 
I Class trees of 18,160=16,950. 
II „ „ =15,950 +tV of 18,160=17,160. 
III „ „ =27,930. 
IV „ „ =147,000. 
In the absence of any reliable data to go on, let it be granted that trees 
of the diSerent classes will survive to reach the exploitable age in the following 
proportions, namely : — 
95 per cent of the I Class. 
85 per cent of the II Class. 
70 per cent of the III Class. 
40 per cent of the dominant trees below 1 foot diameter. 
10 per cent of the suppressed trees below 1 foot diameter and stock In 
plantations. 
The growing stock on M'hich the estimate of the average annual yield must 
be based will then be as follows : — 
Trees. 
I Class 16,100 
11 Class . 14,600 
III Class 19,550 
IV Class 46,900 
From the results of Pressler’s gauge borings and countings of annual rings 
on stumps and logs it is estimated that on an average a teak tree takes — 
70 years to attain a diameter of 12 inches; 
40 years to increase from 12 to 18 inches ; » 
55 years to increase from 18 to 24 inches in dry and 26 inches in moist 
forest ; 
that is, a tree attains the lowest limit of girth for girdling in 165 years. Allowing 
10 years more for the tree to attain its maximum of utility, the average annual 
yield for the first two periods, or a total of 70 years, might be — 
16,1004-14^^ + 19,350 ^ 
70 
or estimating for the whole revolution of 175 years — 
16,100 + 14,600+19,550+46,900 
175 
= 555 trees. 
