482 



The Philippine Jouimal of Science 



1914 



// 



Table XXII. — Annual diameter growth of Dipterocarpus spp. {panao and 

 apitong). Northern Laguna forest ^ Laguna Province, Luzon. 



[Diameter and gro^vth are given in centimeters.] 



No. of tree in class. 



Diameter class in centimeters. 



to 10. ! 10 to 20. 



40 to 50. 1 60 to 70. 



Diam- 

 eter. 



Growth. ^^" Growth. 



^J^; Growth. 



Diam- 

 eter. 



Growth. 



1 



7.0 



0. 033 12. 5 0. 148 



4R s 1 n oon 



67.0 



0.189 



2 



6.9 



0.148 ! 15.2 0.132: 42.0 0.230 



3 : :: ;: 



12.2 0.181 1 47.1 ; 0.247 



12.3 0.066 1 47.3 i 0.362 







4 















Total 



Average 



Years in class 



0.181 



0.091 



109.9 



■ 0.527 



! 0.132 



75.7 



' 0.839 



1 0.210 



47.6 



0.189 



0.189 



52.9 



Age in years. 

 20 40 fiO SO !00 120 1*6 ISO 180 ZOO Z20 2^0 260 280 300 











1 











1 — 

















60 

















































1 



















10 

















/ 





























-il 



J// 



Z' 















X'/l 













r^jrzi 

















<n 













^ 

 « 



V/, 





3 















0* 



c 













J/ 



i. 



# 



w 

 /^ 















— - 









I 



\M 



V 















\A 



^ 10 











^, 





% 















y 







^ *0 



B 



S 



Q 









// 



^A 



/ 









zti 



<^^^p\ 



f^ 









30 









yw 













^ 



/ 

























y 



/" 



















f 



/ > 









o** 



y 



y^ 



















/a 







/ 



y^ 























Y 







^ 

































k^ 





























































Fig. 2. Rates of Krowth of dipterocarps in northern Laguna Province, Luzon. 



