AGRICULURAL EXPERIMENT STATION. 



137 



TABLE I. 



Crop. 



<i3 



u 



a 

 s 



o 

 A 



"§: 



% 



Yield with Dissolved Bone- 

 black 200 lbs., Muriate of 

 Poiash 50 lbs., and Sul- 

 phate of Ammonia 60 lbs. 

 p»r acre, in 1886, 1SS7, and 

 1889. 



Yield with Dissolved Bone- 

 black 300 lbs., MuHate of 

 Potash 100 lbs., and Sul- 

 phate of Ammonia 120 lbs. 

 per acre, in 1886, 1887, and 

 1889. 



Yield with Dissolved Bone- 

 black 400 lbs., Muriate of 

 Potash 150 lbs., and Sul- 

 phate of Ammonia 180 lbs. 

 per acre, in 1886, 1887, and 

 1S89. 



Oats, 1886 



54.1 busheis. 

 27-4 " 

 2100 lbs. 



57*5 bushels. 



30.0 



2-166 lbs. 



69.0 bushels. 

 28.6 " 

 1767 lbs. 



68. bushels. 



Oats 1887 



40.5 " 



Hay 1888 



2374 lbs. 







Peas 1890 



12.7 bushels. 

 98.0 



14.9 bushels- 

 40.1 



13.7 bushels. 

 42.6 





Oats, 1891 



42.6 " 







Total value of crop . . . 



$*014 



$93., 25 1 $89 04 $99.27 



Value of crop on manured plots in 



$13.11 



$8.90 



$19.13 



Value of fertilizers ap 





$15.60 



$27 60 



$39.60 





Table I furnishes the most important data. We find that 

 the excess of the value of the crops on the manured 

 plots over the unmanured plots is not sufficient to pay for the 

 fertilizers in any case. We also find that the smallest amounts 

 come nearer paying for themselves in the increase of the crop. 

 It is probable, however, that the manured plots will continue to 

 give larger yields on account of the applied fertilizers for some 

 years to come. If the season of 1887 had been a favorable one 

 for oats and an average crop produced, it is probable that those 

 plots to which the least amount of fertilizer has been applied 

 would have paid for the fertilizer in the increase of the crop. 

 But it is not probable that either of the other sets of plots would 

 have accomplished this result. 



Conclusion. 

 From the investigation this conclusion can be safely drawn. 

 Commercial fertilizers applied at the rate of 300 lbs. to 500 

 lbs. per acre are more likely to pay for themselves in 

 increased crop produced than larger quantities. 



