MANURING AND FERTILIZING 47 



become available later on, hence we may take 2^}( 

 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. 



Pounds 



Nitrate of soda containing iS/4 P^^ cent, nitrogen ; to fur- 

 nish 22^4, 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 



2,000 



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 adlion 

 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. 



