1907.] 



PUBLIC DOCUMENT— No. 33. 



55 



is then spread, aud as soon as convenient the entire area, 

 including both the winter and the spring applications, is 

 plowed. It is estimated that the double handling of the 

 manure required in the case of that portion which is applied 

 in the spring costs at the rate of $4.80 per acre more than 

 the single handling where the manure is spread when hauled 

 during the winter. 



The experiment was begun in 1899 ; the present season, 

 therefore, is the eighth during which the experiment has been 

 continued. The crop of the past season was corn. Fourteen 

 different varieties of seed were used. The different plots, 

 however, were so planted that each contained equal areas of 

 each variety. The fact that a number of varieties was used 

 is mentioned only because it is a partial explanation of the 

 fact that the yield in this field is considerably lower than is 

 usual in this vicinity on well-manured land. This inferiority 

 in yield was due to the fact that many of the varieties which 

 we had been asked to test by the United States Department 

 of Agriculture proved comparatively worthless. The rates 

 of yield per acre and the relative standing of the several 

 plots are shown in the following tables : — 



Corn and Stover. — Actual Yields (Bates 2)er Acre). 



