THE CULTIVATION OF COCOA 191 



nitrogen, 0*3 per cent potash, and O'l per cent phos- 

 phoric anhydride, and in the meantime they add humus 

 to the soil. 



Another good method is to leave the husks buried 

 for a fortnight or so and then to spread them out where 

 they are thought to be most useful as manure for 

 instance, round the young cocoa plants. It has been 

 observed that, when the heaps have been made large 



Photo. Hisgen, supplied by the late Mr. C. MacGillavry. 



FIG. 62. Burying the husks after breaking (plantation "Djati Eoenggo," Java). 

 The tree has been allowed to grow in the Ecuadorian way (compare Figs. 58, 59, 60). 



enough, the husks soon begin to ferment, thus causing 

 the temperature to rise high enough to kill noxious 

 insects and fungi. 



3. Do not leave dead trees lying in the fields. 

 Dead cocoa trees and dead shade trees should be re- 

 moved as quickly as possible and burned, whether an 

 infectious disease is the cause of death or not. When a 

 tree has been attacked by an infectious disease it is, of 

 course, necessary to remove it in order to prevent the 

 infection spreading, but apart from this, all dead wood 



