66 



Value of average uet increment, $7.19. 

 Financial result, 3.19 gain. 



RESULTS OF THE ADDITION OF PHOSPHORIC ACID TO 



Nitrate Muriate Nitrate Average 



Nothing. of soda. of potash, and potash, result. 



Large, bushels per acre, 23.56 54.39 —2.92 —7.25 16.94 

 Small, " '' 4.78 5.44 —2.92 1.66 2.24 



Value ol average net increment, $8.81. 



Financial result, 4.01 gain. 



RESULTS OF THE ADDITION OF POTASH TO 



Nitrate Phosph'ic Nitrate and Average 

 Nothing. of soda. acid. Phos.acid. result. 



Large, bushels per acre, 15.75 27.13—10.73 —34.50 —.59 

 Small, " " .84 2.61 —6.86 —1.17 —1.15 



Value of average net decrease, $0.46. 



Financial result, 3.66 loss. 



RESULTS OF THE ADDITION TO NOTHING OF 



Complete Barn yard Land 



fertilizer. 



Large, l)ushels per acre. 21.33 



Small, " " 4.16 



Fertilizer. 



Value of increment due to $11.29 

 Financial result, 0.71 loss 3.03 loss 0.53 gain 1.37 gain 



These comparisons make it evident that the results of this experi- 

 ment are worthless in so far as the indication of the plant food 

 requirements of the crop is concerned. Plot six gave a much better 

 crop than any other receiving fertilizer. There appears no sufficient 

 reason why this should have been so. This peculiarity makes it 

 appear that either nitrogen or phosphoric acid used with the other 

 alone, produced a larger increase in crop than when used with the 

 other and potash. When it is noted that potash under some condi- 

 tions has given an increase, this becomes the more strange ; and we 

 are driven to conclude that the variations in crop on these plots have 

 been largely caused by accidental variations in conditions beyond 

 our control. Last year this soil responded most freely to phosphoric 

 acid. The same appears to be the teaching of the experiment of this 

 year, although nitrate of soda is not far behind the dissolved bone- 

 black in its apparent beneficial effect. Neither lime nor plaster 

 produced effects sufficiently great to indicate any important benefit 

 from their use, although both appear to have paid for themselves. 



