Food for Although there are many valuable suggestions offered 



Plants ky tne ex p er i m ents, at least two are of fundamental im- 

 portance, and cannot be too strongly urged upon the attention 

 of farmers: 



1. That the constituents Nitrogen, phosphoric acid and 

 potash, as found in commercial supplies furnishing these 

 elements, do serve as plant-food, nourishing the plant in the 

 same manner as those in home manures, and should, there- 

 fore, be liberally used, in order to guarantee maximum crops. 



2. Of these constituent elements Nitrogen is of especial 

 importance, because it is the one element which, in its natural 

 state, must be changed in form before it can be used by the 

 plants. Hence, its application in an immediately-available 

 form is especially advantageous for quick- growing vegetable 

 crops, whose marketable quality is measured by rapid and 

 continuous growth, and for those field crops which make their 

 greatest development in spring, before the conditions are 

 favorable for the change of the Nitrogen in the soil into 

 forms usable by plants. 



