360 



DRY FARMING 



essential to growth. When each is provided in suitable 

 quantity and in available form, the soil produces abund- 

 antly. If any one is lacking, no growth whatever will 

 take place. And it is important to note that the factor 

 that is present in smallest quantity in relation to the 



Fig. 107. — Bacon Hogs in the Making. 



need of the crop will determine the yield. A chain is as 

 strong as its weakest link. The yield of a crop will be 

 as high and no higher than the supply of the limiting 

 factor will permit. 



318. The Vital Part of the Problem— That of Profit.— 

 It is not enough that man should know the factors that 

 are essential to plant growth nor that he should provide 

 them. The intelligent farmer does not farm for his 

 health alone. For him there must be some profit after 

 the various items in the cost of production have been 

 paid. 



It is not difficult to grow crops. It is not very difficult 



