10 
Indian Forest Records . 
[VOL. III. 
teak-bearing forest only, the area of this forest being separately esti¬ 
mated and the total growing-stock in it being deduced accordingly. 
In most working-plans the area enumerated is roughly J of the total 
area under consideration, but in some cases it is more or less . details 
are given in the last column of Appendix II. 
In a few cases linear valuation surveys have been adopted. Among 
the older working-plans this system was 
Linear valuation surveys. employe( j j n the case of the Mohnyin reserve 
(Katha) and part of the Mokka reserve (Tharrawaddy). It has agam 
come into prominence lately, in connection with the Taungdwin 
Reserve in the Myittha Division, and the Hintha Working Circle of the 
Ruby Mines Division, the main object being the compilation of working- 
plans with greater despatch than is possible where representative 
sample-plots have to be laid out. 
In the case of two working-plans—those of the Kangyi reserve in the 
Zigon Division (7’6 square miles), and the 
Enumeration of the whole g at p b k 5 Sitkwin and Thindawyo reserves 
of the Tharrawaddy Division (207 square 
miles)—enumerations extended over the whole area. These reserves 
being on flat land, with few well-defined natural features, it was found 
more expeditious and less costly to enumerate the whole area than 
to mark out sample-plots. 
4. Teak Growing-Stock over whole Forests. 
(1) General. 
The proportion of teak in any piece of forest must necessarily depend 
on the extent of forest taken, for if small 
Size of areas considered. be ^ WQuld be possible to 
select groups of pure teak forest containing a much larger number of 
teak trees per acre than can ever be found over extensive areas. For 
our purpose the most practical method of procedure will be to consider 
the growing stock in teak-bearing forest over large areas, namely, whole 
working-circles. 
The working-plans generally divide the tracts dealt with into k4 teak- 
bearing ’ 5 and c 4 non-teak-bearing 5 5 forest, 
Teak-bearing and non-teak- tbe latter including blanks, river-beds, etc., 
b0B;i*iii^ torest. _ d 
as well as evergreen, indaing and other 
types of forest which bear no teak. Unfortunately the term 4 4 teak- 
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