224, THE FARMER OF TO-MORROW 



Science merely explains a condition in this 

 instance. 



The two schools separate here. 



The established school teaches that potash, 

 phosphorus and calcium are not only limited 

 in ultimate quantity, but enter soluble com- 

 binations so slowly that they must be added 

 in soluble form to maintain fertility. 



The new school says that these three ele- 

 ments are not only present in inexhaustible 

 quantities, but are at all times soluble, no 

 matter in what form they may exist. 



The parting of the ways comes with the 

 meaning of the word "available." Both agree 

 that plant food must be in solution to be made 

 use of by plants. 



What is soluble? 



Everything is soluble, in everything else, 

 say the scientists of this day. It is merely a 

 matter of degree. 



A statement that gold is soluble in air would 

 probably be laughed to scorn by many. Yet 

 that gold is soluble in ordinary air is a fact 

 recognized by all metallurgists and to such 

 an extent that only recently it was seriously 

 suggested that ordinary weighing machines 

 such as are used in the federal assay offices 



