14 Experiments upon Swedes. 



Plot 9. Manured with 1 cwt. of Sulphate of Ammonia. 



tons. cwts. qrs. Ibs. 



Produce 15 17 3 12 



Increase ! 3 2 8 



Plot 12. Manured with 2 cwts. of Sulphate of Ammonia. 



tone. cwts. qrs. Ibs. 



Produce 16 17 3 12 



Increase 2 32 8 



The sulphate of ammonia used in these experiments was 

 found to consist, in 100 parts, of 



Pure sulphate of ammonia 98*28 



Fixed salts .. .. -78 



Moisture *94r 



100-00 



The increase on Plot 9, obtained with 1 cwt. of sulphate of 

 ammonia, is inconsiderable, and might be ascribed to natural 

 variations in the soil, or to the ashes with which the sulphate 

 was mixed. But the larger increase, produced by double the 

 quantity used on Plot 12, together with the fact that Peruvian 

 guano produced a much better result than in former experiments, 

 shows that sulphate of ammonia has had a beneficial effect on 

 the swedes in this instance. The effect, however, was not great 

 when compared with that produced by phosphatic manures. 



Plot 1 1 . Manured with 3 cwts. of fine Bone-dust. 



tons. cwts. qrs. Ibs. 



' Produce ........ 18 9 2 16 



Increase .. .'. .... 3 15 1 12 



Bone-dust, as might have been anticipated, gave a considerable 

 increase. The bone-dust used in this experiment was very 

 fine, it having been specially reduced to a coarse meal. On 

 analysis it was found to consist of 



Moisture .. 10'58 



"Organic matter 30'61 



Phosphates . .. 51-67 



Carbonate of lime and magnesia . . . . 6'03 



Alkaline salts , .. .. 0'58 



Sand . .... 0-53 



'^r 100-00 



* Containing nitrogen 3'71 



Equal to ammonia ' . . 4'50 



\., ' ., .. ,. ., ,. : - - 



Plot 13. Manured with 3 cwts. of Turnip-manure. 



tons. cwts. qrs. Ibs. 



Produce ., > 20 1 1 20 



Increase 5 7 16 



