CONCLUSION 307 



nually to dispose of sewage, the highest and 

 most active form of "fertilizer." 



If we can judge by the history of other 

 nations, the problems of the next few hundred 

 years, so far as food supply is concerned, are 

 not in the least terrifying. Compared with the 

 older nations, the American farmer has not 

 yet begun to farm. Without intensifying his 

 methods, the American farmer still possesses 

 enough raw land to support twice the popula- 

 tion he is supporting to-day. In another fifty 

 years we will have attained this population at 

 the present rate of increase. 



Of the land nominally in farms at the pres- 

 ent day, there are available ten acres to feed 

 one human being. The millions of China 

 thrive in content, with an allotment of less than 

 one-half acre to every soul, and when we shall 

 have attained a population ten times as dense 

 as it is to-day, when we shall have crossed the 

 billion mark, still we will possess twice as 

 much food resources measured in terms of 

 cultivable land as does Japan at the present 

 day. 



In Germany the services of one farm laborer 

 are required for every nine acres of land. In 

 the United States our speed is still so slow 



