COMMERCIAL FERTILISERS 403 



made productive by applications of marl. It 

 improves the texture of the soil, sets free plant 

 food and corrects acidity, the same as lime. If 

 a deposit of it is handy, it is certainly worth using. 

 Salt was once used considerably as a fertiliser, 

 especially on asparagus. It makes the soil more 

 moist and assists decay, but its agricultural value 

 is not equal to its cost, which is $4 to $6 per ton. 

 The potash salt, kainit, is one-third common salt. 

 If salt is needed, buy it in this form, because the 

 price of kainit is based solely upon the amount of 

 potash in it. 



