72 



The amoimt applied (32 eu. ft.) to plot 13, weighed 1400 pounds, 

 and at this rate per acre it would furnish : nitrogen, 131.6 pounds ; 

 phosphoric acid, 89.6 pounds; and potash, 159.6 pounds. 



RESULTS OF THE ADDITION OF NITROGEN TO 



Nothing. 



Large, bushels per acre, 3.44 

 Small, " " —.11 



Value of net average increment, $1.71 



Financial result, 2.29 loss. 



RESULTS OF THE ADDITION OF PHOSPHORIC ACID TO 



Nitrate Muriate Nitrate Average 



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



Large, bushels per acre, 15.56 11.89 —12.25 —.34 3.71 



Small, " " .45 2.27 .75 .41 .97 



Value of net average increment, $2.00 



Financial result, 2.80 loss. 



RESULTS OF THE ADDITION OF POTASH TO 



Nitrate Phosph'ic Niti-ate and Average 

 Nothing. of soda. acid. phos. acid, result. 



Large, bushels per acre, 46.16 41.06 18.35 28.83 33.60 

 Small, " " —.92 1.69 —.62 —.17 —.005 



Value of net average increment, $16.80 



Financial result, 13.60 gain. 



RESULTS OF THE ADDITION TO NOTHING OF 



Complete Barn-yai-d Land 



fertilizer. manure. plaster. Lime. 



Large, bushels per acre, 44.16 132.33 2.75 1.67 



Small, " " 1.99 .77 1.50 .22 



Fertilizer. Manure. Plaster. Lime. 



Value of net average 



increment due to $22.38 $66.28 $1.60 $0.87 



Financial result, 10.38 gain 41.28 gain 0.88 gain 0.09 loss 



These comparisons make evident the fact that for potatoes, as for 

 corn last year, potash should be a piominent ingredient of the fertil- 

 izer used. Neither nitrogen nor phosphoric acid gave results of any 

 great importance, while potash alone, and in every combination, 

 produced a profitable increase. 



In this experiment, contrary to the general result, the manure gave 

 a much better crop than "complete" fertilizer. This may have 

 been, in part, due to its superior quality, but it is believed that the 



