1900.] PUBLIC DOCUMENT — Xo. 33. 21 



ply much lime. This entire question, however, demands further 

 experimental study, and I am not at present prepared to give 

 definite advice upon this point. 



Manure Alone v. Manure and Potash, 

 An experiment in continued corn culture for the compari- 

 son of an average application of manure with a smaller ap- 

 plication of manure used in connection with muriate of potash 

 was begun in 1890. A full account will be found in the 

 annual reports of 1890-96, and in 1895 a general summary 

 of the results up to that date was given. 



The land used in this experiment was seeded with a mix- 

 ture of timothy, red-top and clover in the standing corn of 

 1896. A good stand of grass and clover was secured, al- 

 though the latter was rather unevenly developed in different 

 parts of the field, suggesting a possible lack of thoroughness 

 in mixing the seeds. 



No manure or potash was used in 1897. The field was 

 kept in grass two years, and was manured as usual in 1898. 

 It includes four plots, of one-fourth an acre each. The aver- 

 age results while in grass are shown below : — 



Plots 1 and 3 (manure alone, fi cords per acre, 1890-96) : per 

 acre, hay, o,6G2 pounds ; rowen, 3,218 pounds. 



Plots 2 and 4 (manure, 3 cords per acre, 1890-92 ; 4 cords, 

 1893-90; and potash, 160 pounds per acre) : per acre, hay, 4,540 

 pounds; rowen, 2,633 pounds. 



The sod was turned in the autumn of 1898 and was ma- 

 nured this spring, as shown below : — 



Plot 1, manure, 1^ cord; weight, 8,825 pounds, 

 p, , o f manure, 1 cord; weight, 5,880 pounds. 



' ( high-grade sulfate of potash, 40 pounds. 

 Plot 3, manure, 1^ cord ; weight, 8,840 pounds, 

 p, . , j manure, 1 cord ; weight, 5,880 pounds. 



' 1 high-grade sulfate of potash, 40 pounds. 



The crop this year has been corn (Sibley's Pride of the 

 North), and its development appears to have been normal 

 in all respects. The crop was a heavy one on all plots. 



