97 



5. Sulphate of Ammonia and Muriate of Ammonia Compared. 



Along- with the field experiment on this subject (see page 86) 

 a similar one was carried out at the Pot-culture Station. The 

 soil was from the headland of Stackyard Field, the crop, wheat. 

 A dressing of superphosphate and sulphate of potash was given 

 to each lot at sowing time, and the ammonia salts were given 

 later as top-dressings. These latter consisted of sulphate of 

 ammonia, 1 cwt. per acre, and muriate of ammonia equivalent in 

 ammonia to 1 cwt. per acre of sulphate of ammonia. 



Wheat was sown on December 23rd, 1922; the top-dressings 

 were given on June 11th. Towards the end of July the muriate 

 pots looked the better, though the ripening of the crops was 

 retarded. 



The crops were cut on August 14th and gave the following 

 comparative returns : — 



Sulphate of Ammonia and Muriate of Ammonia, 1923. 



The results were confirmatory of the field ones, and indicated 

 the superiority of the muriate in the case, at least, of corn crops. 



