MANURING AND FERTILIZING 47 



become available later on, hence we may take 23^ 

 pounds nitrogen in the form of nitrate of soda, and 

 36^ pounds in the form of sulphate of ammonia. 

 Cottonseed-meal, dried blood, tankage, etc., might 

 also be used if desired. 



Nitrate of soda containing 15^ per cent, nitrogen ; to fur- 

 nish 23 l /4 pounds nitrogen it requires 150 pounds . 150 



Sulphate of ammonia containing 20 per cent, nitrogen; 

 to furnish 36% pounds nitrogen, it requires 184 

 pounds 184 



Acid phosphate containing 16 per cent, available phos- 

 phoric acid; to furnish 120 pounds phosphoric acid it 

 requires 750 pounds 750 



Muriate of Potash containing 50 per cent, potash; to 



furnish 200 pounds potash it requires 400 pounds . 400 



Filling, sand, etc., used to make weight if desired . . 516 



Unless care be taken in mixing fertilizers loss of 

 valuable ingredients may result. 



1 . Nitrate of soda and soluble phosphate of lime as, 



acid phosphate must not be mixed and allowed 

 to stand for any length of time, or chemical action 

 will take place, resulting in a loss of nitrogen and 

 phosphoric acid. 



2. Do not mix an ammonium salt as, sulphate of am- 



monia with any other fertilizer containing free 

 lime, as the lime will set free the ammonia, which 

 will be lost. 



3. Do not mix soluble and insoluble phosphates to- 



gether. 



