360 TiMEHRl. 



acre may be in part due to the loss occasioned by the 

 well drained state of the soil. 



The following conclusions may be fairly drawn from 

 the experiments with manures : — 



1. The addition of readily available nitrogen to mineral 

 manures produces large increases in the weights of canes 

 grown and sugar obtained, but that dressings of over 

 250 lbs. per acre of sulphate of ammonia do not produce 

 corresponding increases under ordinary climatic condi- 

 tions, and may cause a marked decrease in the richness 

 and purity of the juice. 



2. The most favourable form in which nitrogen can be 

 employed for manuring the sugar cane, appears to be 

 sulphate of ammonia, no advantage appearing to be 

 gained by the use of mixtures of organic and ammo- 

 niacal nitrogen in its place. 



3. Under climatic and soil conditions which have 

 proved to be very favourable for the produ6lion of 

 increased yields of sugar cane by the use of nitrogenous 

 manures, nitrate of soda proved much inferior to sul- 

 phate of ammonia as a source of nitrogen. 



4. The presence of phosphates in the manures is 

 essential for the maximum return of sugar cane from 

 manuring. 



5. Phosphates appear to be preferable in the form of 

 superphosphate of lime, but very great care must be 

 exercised in its application, as whilst dressings capable 

 of supplying from 75 to 80 lbs. per acre of "soluble 

 phosphates" produced excellent results, dressings 

 supplying larger quantities did not produce correspond- 

 ing increases, and excessive dressings may upon soils 

 at all deficient in aftive lime, yield returns but slightly 



