326 
Indian Forest Records. [VOL. I. 
They will be made simultaneously as in that way the work will be more 
concentrated. 
(а) Felling of mature trees. — The most valuable species are : — 
Teak, pyinkado, eng, ingyin, thitya, pyinma, kanyin, thitka, thingan, 
seikkyi, myaukkyaw, zinbyun, and taukkyan. The last named three species 
are in great demand for fuel, especially myaukkyaw which seUs for nearly twice 
as much as any other species. With the exception of pyinkado and kanyin all 
species may be regarded as mature when they have reached a girth of 6 feet, 
measured at breast height and may be felled whenever found, unless it is 
desirable for sylvicultural reasons to leave them standing. As regards pyinkado 
and kanyin, the girth limit is fixed at 7 feet and 8 feet respectively. The areas 
prescribed to be worked annually have been so arranged as to distribute the 
timber and fuel at various centres along the railway line, and thus meet all 
requirements. Each coupe will be kept open for 2 years so as to permit of the 
maximum extraction of timber, fuel and charcoal. 
The following particular rules should be observed — 
(1) When trees show sign of premature decay and would, in the opinion 
of the executive officer, lose their value if left, they may be felled 
at once even if they have not attained the prescribed dimensions. 
(2) Isolated trees should not be felled unless a crop of seedlings already 
exists on the ground, and it is desirable to clear away the cover 
from them. 
(3) Dead trees should be worked out along with green trees marked on 
the areas. 
(б) Improvement fellings. — These wiU be carried out annually in the usual 
way at the same time and over the same areas prescribed for feUings. The 
object will be to assist the best species whether valuable for timber or fuel. 
The total area of the working circle is 53,014 acres including 1,858 acres 
of plantations in the Magayi plantation area. This leaves a balance of 51,156 
acres to be worked over in 20 years. The average annual coupe is therefore 
51,156 X jV, or 2,558 acres. 
The determination of the annual yield is rendered very complicated by the 
extreme irregularity of the forest and the varying rates of growth of the 
numerous component species. It is estimated that with the exception of 
pyinkado and kanyin, two-thirds of the mature trees of all species {i.e., trees of 
6 feet girth and above) will be felled. In the case of pyinkado and kanyin the 
girth limit is 7 feet and 8 feet respectively. No counting of trees of this 
girth were made, the field work having been completed before the Preliminary 
Working Plan was sanctioned. It will, I think, be safe to assume that one- 
third of the pyinkado and kanyin shown under the class “ 6 feet in girth and 
above ” are of the required girth limit of 7 feet and 8 feet respectively and 
calculations will be made accordingly. 
The annual yield must vary considerably owing to the irregularity of the 
forests, and it is only proposed to estimate the average annual yield during 
the first 20 years’ felling rotation. 
According to para. 27 the number of trees of all species 6 feet in girth and 
above is : — 
Teak 
Pyinkado 
Pyinma 
Kanyin 
Eng 
411 others 
3,604 
5,702 
. 15,507 
7,423 
. 17,644 
. 175,135 
