58 



Analysis of Manure Used. 

 Moisture at 100° C, 69.58 per cent. 



Phosphoric acid, .34 " 



Potassium oxide, .49 " 



Nitrogen, .38 " 



Insoluble matter, 11.49 "• 



This manure weighed 46 pounds per cubic foot ; the i)lot received 

 32 cubic feet, 1472 pounds. Such manuring would supply per acre : 

 nitrogen, 111.9 pounds ; phosphoric acid, 100.1 pounds; and potash, 

 144.3 pounds. It produced a net increase in crop at the rate of 

 almost exactly sixty bushels per acre. When we remember that 

 one-hundred bushels of potatoes, on the average, contain only nitro- 

 gen, 12.4 pounds; phosphoric acid, 4 pounds; and potash, 17.6 

 pounds, this result seems especially insignificant. 



RESULTS OF THE ADDITION OF NITROGEN TO 



Phos. acid 

 Phosph'ic Muriate and Average 



Nothing. acid. of potash. potash. result. 



Large, bushels per acre, 16.89 —11.94 23.50 5.01 8.37 



Small, " " —2.22 —1.55 —2.66 —.33 —1.69 



Value of net average increment, $3.94. 



Financial result, 0.06 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, 8.78 —20.05 40.24 21.75 12.68 

 Small, " '' —.45 .1^2 —2.83 —.,50 —.89 



Value of net average increment, $6.21. 



Financial result, 1.41 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, 17.42 24.03 48.88 65.83 39.04 

 Small, '' " —3.17 —3.61 —5.55 —4.33 —4.16 



Value of net average increment, $18.90. 



Financial result, 15.70 gain. 



RESULTS OF THE ADDITION TO NOTHING OF 



Land 

 Plaster. Lime . 



—10.33 —6.89 

 — .67 —4.00 



