532 



The Storage of Farmyard Manure 



Table V. Change in small quantities of mayiure stored in the laboratory. 



Aerobic conditions. 



Expt. 1. Bullock manure, Rothamsted, April, 1914. 



Total weight, grams 

 Composition per cent. 

 Dry matter 

 Nitrogen as ammonia 

 „ ,, nitrate ... 

 „ ,, amide 

 ,, ,, other compoimds 



Total nitrogen 



Amount of dry matter, parts by weight 



Of 100 parts of N originally present there are ; 



As ammonia ... 



,, nitrate 



,, amide 



„ other compounds 

 Total nitrogen ... 



Expt. 2. Mixed manure : bullock, horse and pig, Woking. Made 

 in May, stored till July, then put up for experiment. 



Total weight, grams 



Composition per cent. 

 Dry matter 

 Nitrogen as ammonia . . . 



„ „ nitrate 



„ „ amide 



,. „ other compounds 

 Total nitrogen ... 



Amount of dry matter, parts by weight 

 Of 100 parts of N originally present there 

 are: 



As ammonia 

 ,, nitrate 

 „ amide... 

 „ other compounds 

 Total nitrogen 



* When the sample was first drawn in May it contained 0-15 % of ammonia, but 

 during storage this fell to the amount here given. 

 For full analyses and descriptions see Appendix. 



