THE PHILIPPINE 



Journal of Science 



A. Chemical and Geological Sciences 

 AND THE Industries 



Vol. IX SEPTEMBER, 1914 No. 5 



PHILIPPINE DIPTEROCARP FORESTS 



By William H. Brown and Donald M. Mathews ' 



{From the Botanical Section of the Biological Laboratory of the 



Bureau of Science and from the Division of Investigation 



of the Bureau of Forestry, Manila, P. I.) 



Thirteen plates, 12 text figures, and 1 map 



CONTENTS 



Inteoduction. Volume of Dipterocarp Forests. 



General description of diptero- Growth. 



carp forests. General discussion and methods 



Distribution in the Philippines. of measurements. 



Importance of dipterocarp for- Annual diameter growth, 



ests. Seasonal diameter growth. 



Composition and arrangement of Growth in volume.i 



Philippine dipterocarp forests. Environmental Considerations. 



Description of Selected Areas. Temperature. 



The forest of northern Negros. Moisture; rainfall, soil moisture, 



The forest of Bataan 

 The forest of northern Laguna. 

 The forest of Mount Maquiling. 

 Plant Associations on Cleared 

 Areas. 



humidity, and evaporation. 

 Effect of Cutting in Dipterocarp 



Forests. 

 Planting. 

 General description. Planting on grasslands. 



Cut-over region in northern Planting in second-growth for- 



Negros. ests. 



Cleared areas in Bataan. General Considerations of Man- 



Cleared land at the base of agement. 

 Mount Maquiling. Summary. 



* Assistant professor of forestry, University of the Philippines. 

 129873 413 



