FERTILIZERS. 41 



Phos. 



Ammonia. Acid. Potash. 



Nitrate of soda 300 Ibs. containing 57 Ibs. 



Acid phosphate 1,500 Ibs. containing 210 



Muriate of potash 200 Ibs. containing 100 



Total 2,000 1'bs 57 210 100 



Percentage 2.85 10.5 5.0 



Thus we have our complete formula for a ton of fertilizer 

 having the percentage composition that was wanted. 



In case it is desired to use a raw material containing both 

 ammonia and phosphoric acid, steamed bone meal for instance, 

 the method of calculation would be only slightly modified. To 

 indicate this we will assume that a high grade fertilizer is 

 desired, which shall contain 4.03% ammonia, 16.1% phosphoric 

 acid and 4% potash, and in which it is desired to use 800 pounds 

 of steamed bone meal. 



With the perecents as given a ton of mixed fertilizer would 

 contain 80.6 Ibs. ammonia, 322 Ibs. phosphoric acid, and 80 Ibs. 

 potash. Of these ingredients 16 Ibs. ammonia and 224 Ibs. of 

 phosphoric acid would be contained in the 800 Ibs. steamed bone. 

 This would leave 64.6 Ibs. of ammonia and 98 Ibs. of phosphoric 

 acid to be supplied from the nitrate of soda and acid phosphate 

 respectively. Making the same calculation as in our first formula 

 it is found that 



64,6- 

 98.0 



80.0 



0.19 = 340 Ibs. nitrate of soda. 

 0.14 = 700 Ibs. acid phosphate. 

 0.50 = 160 Ibs. muriate of potash. 



Our formula would then be 



Phos. 

 Ammonia. Acid. Potash. 



Steamed bone meal 800 Ibs. containing 16 Ibs. 224 Ibs 



Acid Phosphate 700 Ibs. containing 98 



Nitrate of soda 340 Ibs. containing 64.6 



Muriate of potash 160 Ibs. containing 80 



Total, 2,000 Ibs. containing 80.6 322 80 



Per cent . 4.03 16.1 4 



