128 



EXPERIMENTS UPON ROOT-CHOPS 



Table XLVI. shows, for selected plots, the manuring, the 

 average produce of root and of leaf, the average percentages 

 of nitrogen and of mineral matter in the dry matter of the 

 roots, and the average percentages and amounts per acre of 

 sugar in the roots, over the three years 1871-73 during 

 which the farmyard manure and the nitrogenous cross - 

 dressings were annually applied. 



Table XLVI. — Sugar-Beet, Averacje inodihce of Roots, and Sugar 

 per cent, and per acre in the Roots, 3 years (1871-73). 



standard Manures. 



Standard Manures and Cross-Dressings 

 each year as under. 





9.^ 

 If 



3W a,, 



issg 





Produce of Roots per acre. 



4&6 



Farmyard Manure (14 tons) 



Superphosphate alone 



Superphos. and Sulphate of Potash 



Sugar per cent, in the Roots. 



4& 



Farmyard Manure (14 tons) 



Superphosphate alone 



Superphos. and Sulphate of Potash 



Per cent. 

 11-84 

 13-08 

 12-97 



Per cent. 

 10-42 

 10-66 

 11-04 



Per cent. 

 10-84 

 11-88 

 12-16 



Per cent. 



9-99 



9-89 



10-66 



Per cent. 

 10-81 

 12-17 

 12-07 



Farmyard Manure (14 tons) 



Superphosphate alone 



Superphos. and Sulphate of Potash 



It will be seen that the nitrogenous cross-dressings, which 

 were the same as those before and subsequently adopted for 

 feeding roots, were very heavy ; indeed, much heavier than is 

 recognised as suitable in the case of beet grown for the pro- 

 duction of sugar. The result was that when these were used 



