96 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Table II. 



Plots. 



.Additions ro3.dc 



No. of 

 plants. 



Total wt. 

 average wt 



Total and 

 wt. of tops. 



Total and 

 average 

 wt. of roots. 









lb. 



lb. 



lb. 



I. VI. XL 



Nothing 



688 



327 



21675 



IIO-25 









•47 



•31 



■ l6 



III. VIII. XIII. 



Manganese sulphate 













and peat 



589 



342-25 



230 



112-25 









'58 



•39 



•ig 



IV. XI. XVI. 



Manganese sulphate 



626 



3i6 



211-25 



I04-75 









'5 



•33 



■17 



V. X. XV. 



Manganese sulphate 













and lime 



648 



3I775 



221*5 



96-25 









•49 



■34 



15 



The " nothing " plots therefore gave the least return, the addition of 

 manganese sulphate increased the return, while this increase was 

 emphasized when peat also was added, and depressed when lime was 

 added in conjunction with manganese sulphate. The increase was 

 only 6 per cent, in the case of the manganese alone, 21 per cent, with 

 manganese and peat, and only 4 per cent, with manganese and lime. 



It may be added that peat alone gave no increase of crop on the 

 average. 



