IX, A, 5 



Brown and Mathews: Dipterocarp Forests 



441 



Table IX. — Stand table for 1 hectare. Northern Laguna forest, Laguna 



Province, Luzon. 



[Based on surveys of 44,100 square meters. Volumes are given in cubic meters.] 



Species. 



Diameter class in centimeters. 



45. 



65. 



65. 



75. 



85. 



95. 



105. 



125. 



Total. 



Pentaeme eontorta ^1 



Shorea teysmanniana _ Hlauans) 



Skorea squamata J 



LHpterocarpus sp- (apitong) 



Hopea pierrei (dalindingan isak) . 



41.50 



8.89 

 11.41 

 14.45 



45.35 



8.53 



8.28 



10.71 



50.15 



5.88 

 3.63 

 8.08 



28.10 



1.44 

 1.37 



«.08 

 3.41 



2.42 



9.19 



452 



190.81 



28.15 

 24.69 

 33.24 

















Total 













76.25 



72.87 



67.74 



30.91 



12.49 



2.42 



9.19 



4.52 



276.39 





bution of trees of different diameters is a factor in the result, 

 and from a management standpoint this forest approaches as 

 nearly the ideal, in regard to composition and the distribution 

 of volume throughout the different size classes, as could be 

 expected of any natural forest in the Philippines. The even 

 distribution of all species throughout a large range of diameters 

 makes the forest thoroughly suited to the selection system of 

 management, which is preeminently the system most suited 

 to forests in which the species are tolerant in youth and later 

 develop into large distinctly intolerant trees. The forest is one 

 of the few in the Islands which could be satisfactorily managed 

 with a diameter limit as the sole managerial regulation, and 

 the problem presented is merely that of the removal of mature 

 trees, which, with careful logging, can be accomplished without 

 endangering the existence or the reproductive power of the 

 forest. 



THE DIPTEROCARP FOREST OF MOUNT MAQUILING 



Mount Maquiling is an isolated volcanic cone situated on Luzon 

 midway between the eastern and western coasts, about 64 kilo- 

 meters southeast of Manila in latitude 14° 10' north and longi- 

 tude 122° east of Greenwich. The climate of the region is 

 distinctly monsoon in character, but the dry season, although 

 pronounced on the eastern side, is very much less severe than 

 on the western side. On the dry western side the forest to a 

 large extent has been replaced by grass areas. The soil of the 

 eastern side is a heavy reddish brown clay of volcanic origin 

 heavily charged with humus. The forest under discussion is 

 located on the eastern and southeastern slopes, extending from 

 the cleared land at the base of the mountain, at elevations of 



