12 



that its abandonment had been seriously considered, 

 but by ample drainage and treatment with lime, the 

 trees thoroughly recovered and compare favourably with 

 neighbouring trees which stand on more hilly ground. 

 Lime is the only manure which is applied. Artificials 

 or dung are never given and will not be required on 

 virgin soil. Latex contains but small quantities of mineral 



FIGURE 4. 

 Abnormal growth of the root in consequence of the marshy soil. 



Normal. 



On marshy soil. 



matter, seeds more. It would be interesting therefore 

 to look for a type with a smaller seed production. 



2. ORIGINAL COVERING OF THE SOIL. 



The original covering is not without influence on the 

 composition of the soil. Under heavy forest the humus 

 is richer in plant food than it is under secondary jungle 



