G 



These results clearly show that there is an increase of outturn 

 by potash manure. Further experiments with increased quantity 

 of potash are necessary. 



11. Phosphoric acid requirements for sugar cane. -~- Many 

 questions were received from cultivators with regard to the use 

 of bones in some form as a sugarcane manure. To settle this 

 question a series of four plota was laid out last year and manured 

 with 60 Ibs., 100 Ibs., 150 Ibs. and 200 Ibs. of phosphoric acid in 

 the form of superphosphate in addition to 350 Ibs. of nitrogen 

 from safflower cake. This year the same experiments are carried 

 with the ratoon cane, but two-thirds of phosphoric acid and 

 nitrogen of the last year have been given. 



Plots 1 and 2 being manured alike last year as the quantity 

 of cake contains more than 100 Ibs. of P 2 O 5 , plot 1 was 

 converted into a complete manure plot this year and hence 

 sulphate of potash was also given in addition to cake and super- 

 phosphate. 



The results with the outturn of the last year are tabulal 

 below for comparison. 



