128 



Food for Yield dry matter. Gain per cent. 



Plants Phosphoric acid, potash only 1 54-° 



Phosphoric acid, potash and Nitrate of Soda. . . . 240.5 83.70 



Phosphoric acid, potash and sulphate of ammonia. 224. 1 61.40 



Phosphoric acid, potash and dried blood 206.0 5 5-^° 



^ The details of the experiment are too 



much at length to give in full here, and we 

 Ammoniate is . . ° ° . ,. r 



.. ,, , , , must limit our remarks to a discussion or 

 Most Valuable. , 1. r^ ^u ^ r • 



the results, rrom the percentage or gain 



it is evident that if the ammonia in the form of Nitrate of 

 Soda is worth i 2 cents per pound, as sulphate of ammonia it 

 is worth only 9 cents, and as dried blood, it is worth only 

 8 cents. That is, if dried blood ammonia costs 8 cents per 

 pound, ammonia from the sulphate of ammonia is cheaper 

 if it can be purchased anywhere under 9 cents per pound, 

 or ammonia from Nitrate of Soda is cheaper if it can be 

 purchased under 12 cents per pound. In like manner 

 comparison was made with farmyard manures with results 

 based on a price of 12 cents per pound of the Nitrated 

 ammonia or Nitrate of Soda, as follows : 



Per pound. 



Fresh solid manure 1-7 cents. 



Fresh solid and liquid manure 5.8 cents. 



Leached solid manure . . 2.0 cents. 



Leached solid and liquid manure 3.8 cents. 



Farmyard manure is commonly valued at $2.50 per 

 ton; as it contains 10 pounds of ammonia, and presumably 

 phosphoric acid and potash together of equal value, the 

 10 pounds of ammonia are worth I1.25 or 12.5 cents per 

 pound. This is very near the actual cost of ammonia in 

 Nitrate of Soda, but ammonia in the Nitrated form is of 

 much greater value than in the organic form, such as 

 farmyard manure; a fact well shown by the above table. 

 If the ammonia of farmyard manure is worth 12.5 cents 

 per pound these experiments show that ammonia in the 

 other forms under examination is worth per pound as 

 follows : 



Solid fresh manure 12.5 cents. 



Solid and liquid fresh manure 42.6 cents. 



Solid leached manure '4- 7 cents. 



Solid and liquid leached manure 27.9 cents. 



Dried blood 60. 5 cents. 



Sulphate of ammonia 67.4 cents. 



Nitrate of Soda 9 ' • 9 ^^^^^- 



