MICHIGAN EXPERIMENT STATION BULLETINS. 

 Table IX. — Average results with fertilizers. 



133 



By reference to the tables it will be seen that the highest yield was 

 obtained when manure was used as a mulch between the rows. This would 

 seem natural, as it would both provide plant food, and prevent evaporation 

 of soil water, which could not be spared in a season like the last. The 

 manure used under seed gave about 50 bushels more of potatoes to the 

 acre than did the adjoining unfertilized plot. Manure over seed in the 

 furrow produced 60 bushels more than the check plot without fertilizers, 

 owing in part probably to the effect as a mulch. 



