ILLUSTRATIONS 



Frontiseiece 



Map of the Philippine Islands, showing principal rivers and mountains of 

 Luzon. 



Plate I 



Fig. 1. The various fractions of a 20-gram sample of a sandy soil (Moun- 

 tain Province No. 33 ) . 

 2. The various fractions of a 20-gram sample of fine sandy loam; an 

 excellent coconut soil (Tayabas No. 16). 



Plate II 



Fig. 1. The various fractions of a 20-gram sample of loam coconut soil 

 (Laguna No. 6). 

 2. The various fractions of a 20-gram sample of Philippine soil ap- 

 proximating an ideal loam. 



Plate III 



Fig. 1. The various fractions of a 20-gram sample of clay loam (Batangas 

 No. 15). 

 2. The various fractions of a 20-gram sample of a clay coconut soil. 

 Unsuited to the cultivation of coconuts (Tayabas No. 13). 



Plate IV 



(Photographs by Beyer) 



Fig. 1. Looking across the Agno River Valley from Updas to the presidencia 

 at Lutab, Benguet, Mountain Province. Bakung in the distance 

 to the right. Cf. Nos. 5 and 7, Tables VI and VII. 



2. Looking across the Agno River Valley from the presidencia at 



Lutab to the coffee groves and towns of Bakung on the right and 

 Updas on the left. Cf. Nos. 5 and 7, Tables VI and VII. 



3. Looking up the Agno River. The first group of terraces north of 



Cabayan presidencia at Lutab in the foreground and coffee trees 

 in the background. Cf. No. 8, Tables VI and VII. 



Plate V 



(Photographs by Beyer) 



Fig. 1. Looking up the Agno River, showing the second group of terracea 

 north of Lutab. Cf. No. 9, Tables VI and VII. 

 2. The large group of terraces at Cusarang, Benguet. Cf. No. 10, 

 Tables VI and VII. 



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