152 



STORRS AGRICULTURAL EXPERIMENT STATION. 



material advantage in the conditions of plot K over those of 

 plot L; the cost of the fertilizer on plot L, was only 8i per cent. , 

 while the yield of crop was 85 per cent, of that of plot K. 



Table 75. 



Yields of oats and peas in the experiment on soil improvement, 



1901. 



The only expense for the green manuring of plots M, N and 

 P was the cost of the seed and the time and labor of sowing it. 

 The land was not plowed, as the soil was quite loose after the 

 potatoes were dug; the seed was covered by harrowing the soil. 

 No account was taken of the cost of seed and of labor. The 

 cost of fertilizing plot M is therefore given in the table as noth- 

 ing because the onl}^ fertilizer was the vetch for green manur- 

 ing; and the cost of fertilizing plots M and P is given as that 

 of the mineral fertilizers used, at the rate of $7.59 per acre on 

 each plot. 



Apparently the most economical of the methods of fertiUzing 

 these three plots was that on plot M. The yield from this plot, 

 with no fertilizer but the vetch plowed under, was practically 

 the same as that from plot P with mineral fertilizers in addition 

 to the vetch, and was larger than that from plot N with the 

 mineral fertilizers and rye for green manure. These results 

 would indicate that the mineral fertilizers were of little or no 

 advantage in this experiment and also that considerable benefit 

 was derived from the vetch as manure, even though the crop 

 plowed under was very light. 



