34 EXPERIMENT STATION. [Jan. 



II. On the field where different potash salts have been under 

 comparison for so many years the crops this year have been 

 sweet corn and early cabbages. The former on two series of 

 plots, the latter on three. Last year the entire field was in 

 potatoes, and the results showed a marked dependence of the 

 potato crop on this soil on a liberal supply of potash, the average 

 yield of the plots to which potash was applied exceeding that 

 on the no-potash plots by 36.96 per cent. During the past 

 year the fields both of sweet corn and cabbages have been re- 

 markably even, and the most striking result of the experiment 

 is that the vield both in the case of sweet corn and cabbages is 

 about the same on the plots to which no potash has been applied 

 for eleven years as on any of the potash plots. The diiference 

 in favor of the potash plots has been for the corn 2.7 per cent; 

 for the cabbages the no-potash plots average 6.33 per cent better 

 than those receiving potash. The yield of the corn on the no- 

 potash plots was at the rate of 48.57 bushels per acre. The 

 yield of the early cabbages on the no-potash jDlots was 48,213 

 pounds per acre. 



III. The corn crop on the field where special corn fertilizer 

 is under comparison with a mixture richer in potash was un- 

 usually good on both fertilizer combinations. On the special 

 corn fertilizer it was at the rate of 94 bushels of sound corn 

 and 7,760 pounds of stover per acre. On the fertilizer richer 

 in potash it was at the rate of 90.23 bushels of sound corn and 

 9,224 pounds of stover per acre. This experiment has now been 

 continued for eighteen years. Incidentally it furnishes a very 

 conclusive answer to the question as to whether corn can be 

 profitably raised on fertilizers. The cost of fertilizers applied 

 to this field, where corn and mixed grass and clover hay have 

 alternated, each being grown for two successive years, has varied 

 in different years from about $12 to $16 per acre. There has 

 not been a single unprofitable crop, and the crop of the last 

 season is the heaviest so far secured. 



IV. The crop of corn produced on the south corn acre, 

 where manure alone is under comparison with a small quantity 

 of manure and a potash salt, was also exceptionally heavy. On 

 the manure alone (6 cords) the rate per acre amounted to 90.43 

 bushels of hard grain and 8,800 pounds of stover per acre. On 



