20 AMERICAN MANURES. 



soils from which these plants must be pro- 

 duced. 



When the farmer is fully informed on these 

 subjects, he can realize the commercial value of 

 those elements of fertility, that are yearly re- 

 moved from his land, in the various forms of the 

 produce that is sent to market ; and also, if he 

 does not add anything to his soil in the shape of 

 manure, and only realizes a bare living for his 

 labor, he can see how much poorer he is becoming 

 every year. A thorough knowledge and ap- 

 preciation of these things will at once convince 

 the farmer, that it is impossible for him to 

 preserve the fertility of his soil unimpaired, even 

 by the most economical and judicious saving and 

 application of all the waste substances produced 

 on his farm; that the portion of this produce 

 which is removed from the farm, in the shape 

 of cattle, and grain, and other produce, is a 

 constant drain on the valuable elements of 

 fertility, that should finally give his land a 

 value; and that if he wishes to preserve its 

 average productiveness, or improve it, he must 

 return an equivalent in some cheaper form. 



To meet this want, concentrated manures and 

 superphosphate of lime are prepared, and the 

 farmer finds in them the most convenient means 

 at hie command to supply the wants of his land. 

 As the names and prices of these fertilizers are 



