CONTENTS 



PART I 



HISTORY AND CHARACTERS OF SULPHATE 

 OF AMMONIA 



PAGE. 



The Manufacture of Ammonia salts ... ... ... 5 



The Introduction of Ammoniacal manures n 



CHARACTERISTICS OF SULPHATE OF AMMONIA : 



1. Chemical Properties ... ... ... ... 14 



2. Behaviour in the Soil ... ... ... ... 16 



3. Exhaustion of Lime ... ... ... ... ... 24 



4. Special Function as a manure ... ... ... 29 



PART II 



AGRICULTURAL RESULTS OBTAINED BY THE 



APPLICATION OF SULPHATE OF AMMONIA 



TO CROPS 



WHEAT : 



1. Experiments at Rothamsted ... ... ... 31 



2. Experiments at Holkham and Rodmersham ... 39 



3. Comparative effect of Autumn and Spring dress- 



ings of Ammonia salts ... ... ... ... 41 



4. Experiments at Woburn ... ... ... ... 44 



5 Influence of Ammonia salts on the quality of the 



produce ... ... ... ... ... ... 48 



6. Practical Remarks 50 



M716541 



