128 



EXPERIMENTS UPON BOOT-CROPS 



Table XL VI. 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. Average produce of Roots, and Sugar 

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



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 



