138 Eeport of the Acting Director and Chemist of the 



We should, then, have the following amounts of materials to be 

 used for one ton of fertilizer : 



500 pounds nitrate of soda 

 1067 pounds acid phosphate 

 400 pounds muriate or potash 



1967 pounds of these mixed materials furnish the 

 amount of nitrogen, potash and phosphoric acid we need for one 

 ton of our formula. How shall we make the mixture up to one 

 ton ? We simply add 33 pounds of sand or other inert matter as a 

 " filling," and we thus obtain one ton of a fertilizer having the 

 composition given above. 



By adding one more ton of filling, we should have two tons of a 

 fertilizer of the following composition : 



Nitrogen 2 per cent. 



Availal)le phosphoric acid 4 " 



Potash 5 " 



By way of further illustration, we add several formulas and the 

 details of their make-up. 



No. 1. High-Grade. — [Comjylete). 



