THE FARMER OF TO-MORROW 



capital? It is so regarded by those who urge 

 the use of mineral fertilizers only as "plant 

 food." We must believe this if we believe 

 that our soils are wearing out, as we are being 

 told on every hand. If our soils contain only 

 sufficient quantities of any of these ingredients 

 to feed us one hundred or two hundred years, 

 surely it is a matter of national concern. 



Here again the promulgates of the new 

 hypothesis take the opposite ground. They 

 believe that the normal agricultural soil will 

 never be deficient in minerals. They have a 

 different conception of the nature of the soil 

 from the old school. 



Briefly they tell us "We are not farming 

 the same soil as our fathers farmed." 



It is changing continually. 



The study of the broad science of geology 

 did not make much progress until the scien- 

 tists recognized the fact that geological 

 changes are as much due to quiet forces that 

 are at all times at work as to great cataclysms 

 of Nature. The blowing of the winds, erosion, 

 the profound movement of ground waters, and 

 a hundred other subtle agencies are at all times 

 working their miracles. They are too subtle, 

 except in rare instances, to be measured in a 



