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 



16.11 35- 2 



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 



