THE YOUNG FARMER 



amount of commercial fertilizer used. Un- 

 fortunately there is no experimental evi- 

 dence bearing upon this question. 



Potash required to maintain fertility is 

 largely to be found in the coarse fodder, 

 such as hay, maize stover and silage, and in 

 the straw used for bedding; hence where 

 these substances are used in abundance and 

 returned to the soil the amount of potash 

 required to be supplied in fertilizers is re- 

 duced to a minimum. Where, however, the 

 amount of live stock is limited and the 

 products sold contain large quantities of 

 potash, such as hay and straw, the supply 

 furnished in fertilizers must be liberal. 



Phosphoric acid is always being slowly 

 depleted from the soil either from the sale 

 of farm crops or animal products. There is 

 no way of returning this loss completely, 

 except from the addition of a commercial 

 fertilizer. 



The above fertilizer suggestions are based 

 on the experiments covering a period of 

 more than 25 years on a limestone soil. 

 Soils may modify materially the amount 



