96 Indian Forest Records. [Vol. VIII. 
Table 33. — Girth-Beehole Incidence in a 22 year-old Plantation, 
Konbilin , Tharrawaddy, 1918. 
Serial No. 
of Sample Tree. 
Class. 
Girth in 
inches. 
Height in 1 
feet. 
Bole in 
feet. 
No. of 
Beeholes. 
2 
s 
15 
57 
39 
1 
7 
s 
15 
40 
35 
2 
4 
s 
19 
64 
40 
0 
5 
D 
22 
0 
43 
0 
6 
D 
30 
75 
45 
4 
1 
D 
30 
70 
42 
3 
3 
D 
35 
84 
62 
7 
8 
D 
40 
68 
41 
8 
Arithmetic mean 
... 
25-75 
... 
... 
312 
On plotting these data to obtain the girth-beehole curve, the graph 
value for a girth of 25*75 inches is found to be 2*25 beeholes, and for 
a girth of 29*0" (being Leete’s value for a 22 year-old tree) is found to 
be 3*25 beeholes. This is an exceptionally low index of attack in 
comparison with indices of other sample plots, and may be due to the 
fact that the plantation has lost much of its purity and approaches the 
condition of a rich patch of natural teak forest. There is however very 
little natural teak nearby. 
The sample trees were chosen with a view to determining if the 
affect of undergrowth is appreciable on single trees, and the following 
descriptions are therefore recorded, although the results are negatived 
by the unexpectedly low general incidence. 
Tree No. 2. Suppressed, under 2 co-dominants; surrounding 
undergrowth lopped. 
Tree No. 7. Suppressed by teak, but in an alluvial flat with much 
bamboo and soft woods intermixed. 
Tree Nos. 4 & 5. Dominated by bamboos. 
Tree No. 6. Dominant on a slight slope, overtopping several 
suppressed teak ; tinwa clumps on all sides up to 
about 30.' 
Tree No. 1. Dominant, well surrounded by suppressed trees, 
bamboos and undergrowth. 
[ 324 ] 
