116 HATCH EXPERIMENT STATION. [Jan. 



difference being at the rate of 3.8 ])ushels per acre ; the fer- 

 tilizer richer in potash gave slightly more stover. The dif- 

 ference in cost of the fertilizers applied on the two sets of 

 plots is at the rate of a little more than $4 per acre. This 

 is the apparent cost of the 3.8 bushels of corn. I say appar- 

 ent, for the following reason : the field was seeded to mixed 

 grass and clover the latter part of July, and at the present 

 time the condition of plots 2 and 4, which received the fer- 

 tilizer richer in potash, indicates a much heavier growth of 

 clover next season than on the other plots. 



It is believed that when this field is once more broken up 

 and put into corn the yields of plots 2 and 4 will stand rela- 

 tively better. 



In conclusion, attention is called to the fact that the results 

 on this field furnish important light upon the problem as to 

 lohether corn can be successfully/ grown on fertilizers alone. 

 The present is the tenth year since this field has been under 

 experiment, and throughout this time fertilizers only, and in 

 very moderate quantities, have been employed. The result 

 this year on the plots richer in potash is a crop at the rate of 

 about 74 bushels of sound corn and of 3 tons of stover per 

 acre, and a magnificent catch of grass and clover. The cost 

 of the fertilizers employed this year on these plots is at the 

 rate of $13.50 per acre, not including the lime. One ton of 

 the latter was put on this year, but such ap})lication will not 

 be required ofteucr than once in six or seven years. 



Manure alone v. Manure and Potash. 

 This experiment, which was intended to illustrate the rel- 

 ative value in crop production of an average application of 

 manure, as compared with a smaller application of manure 

 used in connection with some form of potash, was begun in 

 1890. Full accounts of the results in the different years will 

 be found in preceding annual reports, and summaries are 

 found in the reports for 1895 and 1900. The field contains 

 one acre and is divided into four plots of one-fourth acre each. 

 Corn was the crop in 1899. The field was ploughed last fall 

 and seeded to rye for winter protection. After ploughing 

 this spring the field received a dressing of air-slaked lime at 



