12 HATCH EXPERIMENT STATION. [Jan. 



Combining the figures showing the averages of hay and 

 rowen, we find that plots 1 and 3 have produced an average 

 of 2,187 pounds per plot, which is at the rate of 4 tons, 748 

 pounds, per acre. Plots 2 and 4 have produced an average 

 of 1,497| pounds per plot, which is at the rate of 9 pounds 

 less than 3 tons per acre. The larger quantity of manure, 

 then, produced this year about 11 tons more per acre than 

 the manure and potash. This is a large difference, but a 

 difference which was to be anticipated, in view of the much 

 larger quantity of plant food which has been applied to 

 these plots. It remains to be seen whether the clover on 

 plots 2 and 4 will be capable of so enriching the soil in 

 nitroo:en as to remove or lessen this difference in succeed- 

 ing years. 



"Special" Corn Fertilizer v. Fertilizer richer in 



Potash. 



This experiment was begun with a view of comparing the 

 results obtained with a fertilizer proportioned like the aver- 

 age of the ' ' special " corn fertilizers found upon our mar- 

 kets in 1891 with those obtained with a fertilizer richer in 

 potash but furnishing less nitrogen and phosphoric acid. 



Corn was grown during each of the years from 1891 to 

 1896 inclusive. From 1891 to 1895 it was found that the 

 fertilizer richer in potash gave the more profitable results. 

 In 1896 there was no practical difference. It was decided 

 during the season of 1896 that it might be possible to derive 

 a greater benefit from the larger quantity of potash applied 

 to two of the four plots if grass and clover should be grown 

 in rotation with the corn. Accordingly the land was seeded 

 with a mixture of timothy, red-top and clover in the stand- 

 ing corn in July, 1896. The field is divided into four plots, 

 of one-fourth of an acre each. The materials applied to the 

 several plots are shown in the following table : — 



