134 BEET-ROOT SUGAR AND 



solid material removed from a field with every ton 

 of beets is as follows : 



Roots. Leaves. 



Ibs. Ibs. 



Potash, 4.99 . . . 7.86 



Soda, 3.02 . . . 2.52 



Lime, 41 ... 3.31 



Magnesia, 43 ... 3.27 



Oxide of Iron, ... .12 ... .52 



Phosphoric acid, . . .66 . . . 1.94 



Sulphuric acid, ... .65 ... 2.20 



Chloride of soda, . . 5.29 . . . 12.82 



Silica, 54 . . . .76 



i6.n 35- 2 o 



Calculating the average yield at twenty tons to an 

 acre, and assuming that the leaves, as well as the 

 roots, are removed, there would be taken from each 

 acre 1026^^ pounds of solid material. 



In order to maintain the fertility of the soil, it will 

 be necessary to return this amount to the land. Sta- 

 ble manure will not provide all the requisite materials, 

 and the deficiency must be supplied with properly 

 composed artificial fertilizers. 



Barral says to French agriculturists, " Buy artificial 

 manures, but above all increase your stable manure." 



ROTATION OF CROPS. 



The necessity of a rotation of crops is too well 

 established to be discussed the only question is, 

 What is the best succession ? I am aware that some 

 farmers, particularly at the west, proceed upon the 



