234 



MANURES FOR TREES 



Superphosphates enter into the composition of 

 a large number of special manures, the supply of 

 phosphoric acid being ready for root-absorption 

 and the growth of the tree. 



Nitrate of Soda, cubic nitre, or Chili salt- 

 petre is essentially a nitrogenous manure, and a 

 good sample contains in 100 parts : — 



Nitrate of soda is a valuable ingredient in a 

 large number of special manures. It is readily 



