160 



Experiments upon Sicedes. 



Avould have produced a marked effect in one or other of these 

 combinations. 



I have carefully analysed the bone-ash dissolved in sulphuric 

 acid, and obtained the following analytical results : — 



Water 32-80 



Organic matter .. .. '13 



Biphospbate of lime IS'49 



Equal to bone-earth, rendered sohible l)y acid .. (28'80) 



Insoluble phosphates G-43 



Hydrated sulphate of lime 3S"39 



Alkaline salts 1-94: 



Sand 1-82 



100-00 



The swedes were taken up in the last week of November, 

 topped and tailed, and the Avhole produce of each plot weighed. 



Table, showing the Produce of trimmed Swedes of Experimental Plots, cal- 

 culated per Acre, as loell as the Increase over the unmanured part of 

 Field. 



Plot 



I. 



II. 

 III. 



IV. 

 Y. 



VI. 



VII. 



VIII. 

 IX. 



XI. 



XII. 



Produce 

 per Acre. 



15 tons of farmyard manure yielded 



6 cwts. of gypsum yielded .. 

 j 6 cwts. of boneash, dissolved in\ 

 { sulphuric acid, yielded .. ../ 

 ( 6 cwts. of sulphate of ammonia) 



\ yielded I 



I 6 cwts. of sulphate of ammonia, and 1 

 < G cwts. of boneash, dissolved in> 



( acid, yielded ) 



J 12 cwts. of bone-ash, dissolved in) 



\ acid, yielded / 



f 6 cwts. of sulphate of potash I 

 i yielded j 



Nothing yielded 



(12 cwts. of crystallised sulphate ofl 

 "j soda yielded J 



16 cwts. of dissolved bone-ash, and^ 

 6 cwts. of sulphate of ammonia, and I 

 6 cwts. of sulphate of potash [ 

 yielded | 



j 3 cwts. of dissolved bone- ash 1 



1 yielded f 



Nothing yielded '2 



tons. cwts. lbs. 

 7 16 38 



2 12 51 



8 6 41 



8 12 90 



10 

 

 G 



6 17 



19 

 11 



Increase 

 per Acre. 



tons. cwts. lbs. 

 5 75 



14 



7 



3 24 



5 10 78 



17 15 



I 10 46 



43 



decrease. 



decrease. 



decrease. 



In constructing this Table, the natural produce of the experi- 

 mental field was taken at 2 tons 15 cwt. 75 lbs., being the 

 average of the two unmanured plots Nos. VIII. and XII. 



