CHAPTER V 



KOTATION OF CKOPS 



The worth in dollars and cents of a good 

 system of rotation is suggested by some experi- 

 ments conducted at the Minnesota University 

 Farm. 



One acre on which wheat was grown continu- 

 ously yielded a product worth $13.08 per year. 

 The cost, including rent of land, labor, hire of 

 machinery, etc. was $9.94, leaving a net profit of 

 $3.14. 



On another acre wheat was grown in the 

 standard five-year rotation and the average 

 gross value of the crops for the five years 

 amounted to $15.89, produced at a cost of $10.02. 

 This left a net profit of $5.87 per acre, per year. 



An analysis of the soil showed that the rota- 

 tion system had added both nitrogen and car- 

 bon, while the continuous cropping had reduced 



