62 



ANALYSIS OF MANURE USED. 



Moisture at 100" C, 64.09 



Phosphoric acid. .29 



Potassium oxide, .395 



Nitrogen, .44 



Insoluble matter, 20.01 



The manure used in this experiment weighed 1350 pounds and 

 therefore supplied at the rate of nitrogen, 118.8 pounds ; phosphoric 

 acid, 73.3 pounds; and potash, 106.7 pounds per acre. 



It produced a total increase in crop at the rate of 78.5 bushels per 

 acre. " Complete" fertilizer supplying nitrogen, 48 pounds ; phos- 

 phoric acid, 96 pounds, and potash, 160 pounds, produced an increase 

 of 78.6 bushels, a considerably larger proportion of which were mer- 

 chantable. It is evident from a comparison of the above figures that 

 the fertilizer must have left in the soil a much larger residue of 

 potash and phosphoric acid than the manure, while the latter has 

 undoubtedly left some organic nitrogen behind. 



RESULTS OF THE ADDITION OF NITROGEN TO 



Phosph'ic Muriate Phos. acid Average 

 NothiDg, acid. of potash, and potash, result. 



Large, bushels per acre, .67 7.21 13.04 18.59 9.88 



Small, " " 1.88 .17 —.30 .09 .46 



Value of average net increment, $5.01. 



Financial result, 2.99 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, —7.50 —.96 32.30 37.85 15.42 



Small, " " —.30 —2.01 1.18 1.57 .11 



Value of average net increment, $7.73. 



Financial result, 1.87 loss. 



RESULTS OF THE ADDITION OF POTASH TO 



Nitrate 

 Nothing, of soda. 



Large, bushels per acre, 26.39 38.76 

 Small, " '' .07 —2.11 



Value of average net increment, $26.15 



Financial result, 19.75 gain. 



RESULTS OF THE ADDITION TO NOTHING OF 



