VARIOUS MANURES. 



149 



of exhausting them if continued, and even then with 

 proper fertilizers they can be renewed. 



Mr. Vivien contends that the most rational calcula- 

 tion for a fertilizer is to ascertain what the soil con- 

 tains, and combine this with a manure in such a man- 

 ner that the total would have for composition : — 



Potassa 40 per cent. 



Nitrogen 23 " 



Liine 17 " 



Phosphoric acid . . . . 10 " 



Organic substance . . . . 10 " 



The above will, without doubt, give excellent re- 

 sults. Mr. George Yille considers that a complete 

 fertilizer, composed as follows, is most desirable for 

 beet culture : — 



On these soils the roots had been planted for eight successive years. As 

 shown with the fertilizer it has continued to give good results, whilst on the 

 ordinary soil left to itself having an extra fertility, the yield has decreased, but 

 the saccharine quality of the root is augmented. In this experiment Mr. Pag- 

 noul made use of a chemical fertihzer composed as follows : — 



1600 



