358 TiMEHRI. 



By analysis the produce grown without phosphates was 

 found to contain on an average '07 1 per cent, of phosphoric 

 anhydride, and that grown with phosphates '086 per 

 cent. The total produce (canes, cane tops, and fallen 

 leaves), without phosphates, therefore, contained 69'5 

 lbs. of phosphoric anhydride as compared with 93 lbs. 

 found in the produce of the plots manured with 75 lbs. 

 of soluble phosphates. We find that where the phos- 

 phates have exerted the most beneficial influence 

 51*2 lbs. of calcium phosphate have been recovered 

 from a manuring supplying an average of 83 lbs. o^ 

 soluble and insoluble phosphates, or that 61*7 per cent, of 

 the phosphates applied have been recovered in the yield. 



Experiments with Potash. 



These experiments were conduced upon a soil 

 not so fertile as that used for the experiments with 

 phosphates, but capable of yielding from i| to 2 tons 

 more canes per acre than that used for the nitrogen 

 experiments. The experiments were only to test 

 the importance of potash when applied to the sugar cane 

 in the form of sulphate of potash, although some attempts 

 were made to ascertain the best time for such appli- 

 cation, but the results obtained were not sufficiently 

 numerous or so well marked as to warrant any reference 

 to them. All the fields were manured with superphosphate 

 and nitrogen, some receiving no potash, the others 

 sulphate of potash in quantities supplying, on an average, 

 40, 60, and 80 lbs. of potash per acre respe6lively. The 

 following table shows the average results obtained : — 



