158 



(iii) Record of results of enumeration surveys. — In the 

 following example of a record of valuation surveys it is 

 assumed that there are three distinct types of forest, and 

 that it is advisable to deal with each type separately and to 

 take sample plots in each : — 



I" 



(o) 



«5 



■ I 2-5 62 

 .II' 1-5 27 



Tbees couiraifiD oir Floib. 



Deodar. 



I i 11 111 IV 



m 



120 



(») 



■lis 6 

 .11 2-5 13 



4S 



Sprace. 



I 11 III IV 



62 126 

 106 189 



220 460 

 86 130 



Total tbebs in compabtmbst of typb. 



Deodar. 



II 111 IV 



• 1,680 



48160 



280 



3,740 



640 



Total number of trees in block 



8,120 



1,770 



6,610 



14,620 



Sprnce. 



I II III IV 



8,620 



6,4i00 



Ebmabes. 



2,040 4,410 



810 



19.920 



9.180 



1,440 



2,850, 5,850 



4,800 



13,980 



The t!/pis of 

 forest are — 



(u) D e o d ar, 

 almoit pure, 

 with a leir 

 oaks and 

 other broad- 

 leave d 

 species. 



(i) Uixed forest 

 17,700 of deodar, 

 sprace and 

 silver firs, 

 with broad- 

 leaved 

 species. 



8,400 (o) Mixed forest 

 of sprncfr 

 and broad- 

 leave d 

 B p ecia » 

 with at 

 deodar. 



The sieet enn.-- 



merated are, in, 



girth :— 



I. — ^Abore 6' 



II — i/ 6"— 6' 



III.-3'-«6" 



rv.-r 6"— S' 



26,100 



(iv) Bates of growth : record of observadons made. — 

 This should show the size of the trees experimented on 

 and the mean radius (if rings are counted on stumps) or the^ 

 mean depth bored (if Pressler's gauge is used), and the 

 average number of rings per inch of radius. It is usual to 

 group the trees in diameter classes and to calculate th& 

 average rate of growth for each class; as this shows at once 

 the number of years required for the trees of one class to- 



