Agricidtaral Chemistrij — Turnips, 



529 



but no carbon. In the 4th column we have the effects of the 

 addition both of the rape-cake and of the ammoniacal salt to the 

 standard mineral manure ; consequently the supply of nitrogen 

 by manure would amount to about 110 lbs. per acre. 



It is seen that, whichever mineral condition be taken, the sup- 

 ply of carbonaceous matter has given the largest bulb. Of the 

 two mineral series, the acid and the alkaline, the former exhibits 

 a general superiority in each case, excepting in the 4th column, 

 where the defect is very trifling. In this case, notwithstanding 

 there was a carbonaceous supply equal to that in column 2, the 

 excessive amount of nitrogenous matter has prevented a favourable 

 formation of bulb. These mean results clearly show that carbona- 

 ceous rather than nitrogenous organic supply is favourable to 

 huTb-f or motion, and the fact is confirmed by the following indivi- 

 dual cases : — 



Selected Results. 



Plot 

 Nos. 



Description of Drilled Manures. 



Drilled 

 Manures 

 only. 



Drilled 

 Manures, 

 and 10 cwt. 

 Rape-cake 

 per Acre. 



Drilled 

 ?>Ianure3, 

 and 3 cwt. 

 Sulph. Am. 

 per Acre. 



Drilled 

 Manures, 

 10 cwt. 

 Rape-cake 

 and 3 cwt. 

 Sulph. Am. 

 per Acre. 



18 

 19 

 20 



Superphosphate of lime, with potass,"! 

 As No. 18, and 1 cwt. sulphate of) 

 As No. 18, and 3 cwt. rape-cake . 



1-16 



1-16 

 1-28 



1-33 



l-2i 

 1-40 



1-18 



1-02 



M8 



1'25 



1-09 

 1-18 



In all these cases the mineral manure was the same, and in all, 

 the 2nd column under the cross-dressing of rape-cake shows the 

 best result. Further, looking at each column separately, we find 

 that No. 20 always gives a heavier bulb than No. 19, and, ex- 

 cepting under the cross-dressings of ammoniacal salt, than No. 18 

 also. The amount of the differences is not indeed great ; but 

 when we remember that the results are calculated from nearly 

 2000 plants in each case, their uniformity and constancy demand 

 that reliance should be placed in them. It is clear, then, that 

 carbonaceous manures aid the development of turnip huTb. We 

 shall give one more quotation on this subject : — 





No Cross- 

 dressing. 



Cro&s- 

 dressed 

 by 10 cwt. 

 Rape- cake 

 per Acre. 



Crois- 

 dressed 

 bv 3 cwt. 

 Sulphiite 

 Ammonia 

 per Acre. 



Cross- 

 dressed 

 by 10 cwt. 

 Rape-cape 

 and 3 cwt. 

 Sulph. Am. 

 per Acre. 



No drilled manure (third season) 



0 11 



0-67 



0-07 



0-50 



Tiie instances before us are of high interest in many points of 



