12 



Plots on which no manure or chemicals were used for the 

 same six years, gave us crops valued at $128.77, ^° that we 

 have a gain of crops on the manured acre valued at $66.10, 

 and this is the result of investing $33. On the acre fertilized 

 with chemicals the excess is valued at $73.44. 



This exjDeriment I regard as a safe one for farmers to study, 

 as it was on a large scale, and under the most favorable cir- 

 cumstances so far as the uniformity of soil and treatment were 

 concerned. 



In the series of experiments represented by the cuts in this 

 bulletin made in iSS9-'90, we have a comparison of the effi- 

 ciency of chemicals, prepared fertilizers, and manure, on land 

 which had been fertilized with ashes either in 1879 or 1880 and 

 had since been in grass. 



PREPARED FERTILIZERS, CHEMICALS, AND ASHES COMPARED. 



Cost. Yield. 



Plot I had the follow- 

 ing chemicals 



dissolved bone-black, 404 lbs., ) 

 muriate of potash, 122^ lbs., > $12.25 19.85 tons, 

 .g, v,..v.....^.*.o ^ sulphate of ammonia, 86 lbs., ) 



* Plot 14, the same as plot I 12.25 16.01 " 



Plot 13 had 6S0 lbs. of Bowker's Hill and Drill Phos- 

 phate 12.25 



Plot 10 had 244 bushels of leached ashes . . . 12.25 



Plot II had 98 bushels of whole ashes .... 12.25 



16.93 '' 

 16.88 " 

 13.60 " 



The amount and cost of the fertilizer above is per /la^J" acre, 

 but the yield is computed per acre, as we are more accustomed 

 to think of the amount we produce per acre. 



MANURE AND ARTIFICIAL FERTILIZERS. 



Plots 10-14 form a series which may be studied by them- 

 selves, and as the yield of 10, 11, 13, and 14 do not vary greatly, 

 except II, we will average them and compare them with No. 

 12, which was spring manured. 



Cost per acre. Tons. 



Fertilized with, 

 riot ID, leached ashes, 

 " II, whole ashes, 

 " 13, Bowker's H. and D. Phosphate, 

 " 14, chemicals, 

 " 12, 3^ cords of manure, 



Gain in favor of artifical fertilizer, 



► S12.25 average yield, 15.85 

 12.25 yield, 11.72 



4-13 



* Plots 10 to 14 had some six or eight years previous to this experiment been 

 fertilized with ashes. 



