AGRICULTURAL EXPERIMENT STATION. 



151 



the fertilizers. All of the fertilizers increased the crop largely, 

 however. The cost of the increase is least with muriate of 

 potash, while the largest crop was produced with dissolved bone 

 black. 



Experiment of Charles S. Pope, Manchester. 

 The crop grown was barley. The combined weights of the 

 crops on the duplicate plots are given so that the weights repre- 

 sent the grain produced on one-tenth of an acre instead of a 

 twentieth. 



Fertilizers applied. 



Dissolved bone-black . 



Nitrate of soda 



Muriate of potash . — 

 Dissolved bone-black. 

 Muriate of potash — 

 Dissolved bone-black . 



Nitrate of soda 



Dissolved bone-black . 

 Muriate of potash . — 



Nitrate of soda 



Nitrate of soda 



Muriate of potash .... 

 No manure 



O N — 



500) 

 150 [ 

 100 ) 

 500 \ 



ioo ; 



5001 



150/ 



500 



100 \ 



150/ 



150 



100 



b)3 . 



o5 



1 and la 



2 and 2a 



3 and 3a 



4 and 4a 



5 and ha 



6 and 6fl 



7 and la 

 S and 8a 



159 



145 



138 



109 



91 



73 

 71 

 61 



2G0 



215 



216 

 176 



172 



165 



1(58 

 147 



5-=> 



33.1 



30.2 



26.7 



22.7 



19.0 



15.2 

 14.8 

 12.7 



Table showing increase in barley crop on manured plots over 

 unmanured plots and cost of increase per bushel at wholesale 

 prices quoted above. 



Plots. 



Increase of crop 

 per acre due to 



Cost of fertilizer 



Cost of increase 

 per bushel. 





fertilizers. 



per acre. 





20.4 bushels. 



$11.00 



55 cents. 





17.5 



$8.00 



46 " 





14.0 « 



$9.00 



64 " 





10.0 " 



$6.00 



60 " 





6.3 



$5.00 



79 " 





2.5 "■ 



$3.00 



120 " 





2 1 " 



S2.00 



95 " 











In this experiment dissolved bone black and muriate of potash 

 produced the increase in crop at the least cost per bushel, while 

 dissolved bone black, muriate of potash and nitrate of soda 

 caused the largest gain in crop. 



