THE YOUNG FARMER 



so that the influence of the soil has been 

 entirely eliminated. At the December farm 

 prices for the decade ending December i, 

 1906, the value of these four crops per acre 

 have been: Maize, $29.67; oats, $14.49; 

 wheat, $18.49; and hay, $18.05. It Wl ^ be 

 noted that during 25 years the average in- 

 come from an acre of maize has been almost 

 exactly twice that from an acre of oats. The 

 region where these results were obtained is 

 relatively unfavorable to a large yield of 

 maize. It is obvious, therefore, that a mod- 

 ification in the rotation may modify the 

 average income from the farm materially, 

 provided such modification does not reduce 

 the fertility of the soil. Thus, while the 

 average income per acre during 25 years for 

 the four-course rotation above mentioned 

 was $20.17, if the rotation were increased to 

 a five-course rotation by the addition of an- 

 other year of maize, the average income 

 would be $22.45 an acre. 



It may be desirable to modify the rota- 

 tion in order to increase or decrease a cer- 

 tain crop usually fed upon the farm. Thus, 

 102 



