102 



READINGS IN RURAL ECONOMICS 



TAT.LE 1. CROP YIELDS 1'F.R ACRE IX THE UNITED STATES, 

 FROM Till: CENSUS REPORTS 



large areas of arid land were brought into cultivation. The aver- 

 age yields on this new land are lower than those in the older 

 states. Hence the yields of later years are lowered, not by the 

 exhaustion of the soils in the older states, but by the addition of 

 new land with low yields. It is therefore misleading to quote the 



