EVIDENCES OF ACIDITY 



mentsof plant food to land and yet skimp its 

 supply of lime, but naturally poor soils are 

 quite surely in the acid class. The excep- 

 tions in our humid region are not extensive. 

 When improvement is planned for, involv- 

 ing additions of organic matter and plant 

 food, the application of lime to correct 

 acidity is the first requirement. If such 

 land could be given the characteristics of a 

 limestone soil so far only as the lime factor 

 is concerned, the building up of fertility 

 would be relatively easy. Liming must 

 form the foundation of a new order of 

 things. The ability to grow the clovers 

 and to furnish rich vegetable matter to the 

 soil, which naturally is poor in humus, rests 

 upon lime application first, and then upon 

 any supply of plant food that may continue 

 to be lacking. 



