PURCHASING PLANT-FOOD 



phosphoric acid in a ton as the public can buy in 

 a large way. A 10 per cent acid phosphate is 

 low-grade. The effort is to escape paying freight, 

 and other cost of handling, on waste material as 

 far as possible. Generally speaking, the higher 

 the percentages of plant-food in a fertilizer, the 

 cheaper per pound is the plant-food. A low-grade 

 fertilizer rarely fails to be an expensive one be- 

 cause the expense of handling adds unduly to the 

 price per pound of the small content of plant- 

 food. 



[197] 



