500 



Journal of Agricultural Research 



Vol. XV, No. 9 



In rotation 31 manure has been applied to the same plot twice during the 

 period, while in rotation 61 only one cycle has been completed, and no 

 residual effect of previous applications of manure is to be observed. 



Table III. — Effect of manure on the yield of sugar beets at the Scottshluff, Nebr., Belle 

 Fourche, S. Dak., and Huntley, Mont., field stations, igi2 to 1917, inclusive 



[The yields, differences, and means are expressed in tons per acre] 



SCOTTSBLUFF 



BELLE FOURCHE 



c No manurial effect on this crop. 



