204 



SOILS AND FERTILIZERS 



COMPOSITION OF FERTILIZERS. 



No. i. 



Selling price $25. 

 Per cent. 



Nitrogen as nitrates 1.50 



Phosphoric acid, available 8.00 



" " insoluble 2.00 



Potash (water-soluble) 2.00 



POUNDS PER TON. 



No. i. 



Nitrogen i .50 X 20 = 30 



Phosphoric acid 8.0 X 20 !6o 

 Potash 2.0 X2o= 40 



ESTIMATED VALUE. 



No. i. 



Nitrogen 30 X 0.145 = $4-35 



Phosphoric acid 160 X -o6 = 9.60 



Potash 40X0.045 i. 80 



NO. 2. 



Selling price $30. 

 Per cent. 



2.IO 



IO.OO 



0.50 

 3-50 



No. 2. 



2.IOX 20 42 

 IO.O X 2O = 2OO 

 3.5 X 20= 70 



No. 2. 



42 Xo.i45 = $ 6 -9 

 200 X 0.06 =12.00 

 70X0.045= 3.15 



$15-75 



Difference between estimated value and 

 price, No. i, $9.25; No. 2, $8.76. 



$21.24 

 selling 



Fig. 34. Composition of Fertilizers. 



277. Home Mixing of Fertilizers. At the New 



Jersey Experiment Station it has been shown that 

 " the charges of the manufacturers and dealers for 

 mixing, bagging, shipping, and other expenses are on 

 the average $8.50 per ton, and also that the average 

 manufactured fertilizer contains about 300 pounds of 



