THE MANURING OF THE CANE 



MONTHLY COMPOSITION OF THE CANE (WHOLE PLANT). 

 After ROUF. 



Lbs. per Acre. 



A number of experiments have been made with the view to determining 

 the effect of dividing the applications of manure. In these experiments the 

 manure has been applied at an early stage of the cane's growth and generally 

 within three months of planting. Nearly all these experiments show very 

 little difference in the effect, and as typical of them the following, due to 

 Ledeboer 16 in Java, are quoted : 



Lbs., sulphate of 



ammonia per acre. 



0-308-154-0-0 



0-154-308-0-0 



0-78-231-154-0 



39-116-154-154-0.. 



Cane, 



Tons per acre, 

 57-8 



56-7 

 56-0 



59-o 

 58-2 



Yield 

 per cent, on cane. 



n-54 

 11-58 

 11-64 



"57 

 11-48 



Somewhat different conditions obtain in the Hawaiian Islands, where 

 the cane is allowed in many cases a two years' growth. There it has been 

 found that considerable benefit arises from applications of nitrate of soda 

 immediately before the second growing season. 



The Choice of Nitrogenous Manures. Nitrogen can be applied to the 

 soil as nitrates, as ammonia salts, as organic compounds and in the form of 

 cyanamide. For the special purposes for which readily available nitrogen 

 is used in cane cultivation choice is confined to nitrate of soda and to sulphate 

 of ammonia. Nitrate of lime and cyanamide are not available in sufficient 

 quantity, and the organic forms of nitrogen, such as oil- seed cakes and 

 dried blood, have been found to have a much lower efficiency in regard to 

 the cane than have the two first-mentioned materials. On general principles 

 sulphate of ammonia is indicated as applicable to soils containing a good 



