MANURES, 



In order to restore to the soil the matters which have been 

 taken from it by the removal of its produce, as well as to 

 add to its power to produce to make it richer, or to keep it 

 from growing poorer we make use of what are known as 

 manures. 



This term is a very comprehensive one, and is taken to 

 mean all substances whatever their character or origin 

 which will have the eifect of causing a larger growth of 

 vegetation. 



Manures may be either mechanical or chemical in their 



