16 



sulphate of ammonia— has given an increase valued at $3. 56— a 

 difference of $1.22 in favor of, and due entirely to, the substitu- 

 tion of chemicals for prepared fertilizers, at equal cost. 



This difference is due chiefly to the wrong properties of 

 plant food in the prepared fertilizers, and more to the defi- 

 ciency of potash than any other cause. 



( phosphoric acid 

 Prepared fertilizer gives . . ) potash 



( nitrogen . 



While the chemicals that give { Phosphoric acid 

 best result contain . i potash 



( nitrogen . 



12.0 per cent. 

 3.0 

 3.0 



8.6 

 14.6 



2.4 " 



Chemicals properly mixed and used can and do give as good 

 returns as farm-yard manure, and oftentimes better, and this in. 

 a six years rotation. 



Leached ashes gave better results per dollar invested thaa 

 whole ashes. 



G. H. WHITCHER, 



Director. 



