190S.] Farmyard Manure. 15 



in Table II. It will be seen from this that the loss of nitrogen 

 was much greater during the second period, which only differed 

 from the first in the fact that the dung lay without trampling 

 for a month during the summer. 



Table II. — Loss of Nitrogen in Making and Storing Dung 

 (Maercker and Schneidewind) . 



No. 



Conditions under which 

 Manure was made. 



Nitrogen Supplied. 



Nitrogen Recovered. 



In Food. 



In Litter. 



In Meat. 



In Dung. 







Lb. 



Lb. 



Lb. 



Lb. 





First Experiment. 











1 



Deep box 



1,033 



68-o 



°4'3 



900 



2 



Covered heap 



1,033 



68-o 



68-o 



652 



3 



Open heap 



1,033 



68-o 



68 -o 



646 





Second Experiment. 











4 



Deep box 



922 



52-1 



54-6 



797 



5 



dung lying one 













month untrampled.. . 



953 



65-4 



45'9 



634 







Nitrogen of Food. 



Active Nitrogen 

 Recovered. 



No. 



Conditions under which 

 Manure was made. 



Recovered — 



Lost. 



















In Meat. 



In Dung. 





Calculated. 



Found. 





First Experiment. 



Per cent. 



Per cent. 



Per cent. 



Per cent. 



Per cent. 



1 



2 

 3 



Deep box 



Covered heap 



Open heap 



Second Experiment. 



6-2 

 6-6 

 6-6 



8o-6 

 56-5 

 56-0 



13-2 

 3°"9 

 37'4 



7o 

 7o 

 70 



28-5 

 18-0 

 13-0 



4 

 5 



Deep box 



dung lying one 

 month untrampled ... 



6-o 

 4'8 



8o-8 

 59"7 



13-2 

 35-5 







Taking these results as a whole it is seen that even with the 

 most careful management the loss in making the dung amounts 

 to 13 per cent, of the total nitrogen supplied in the food, in 

 addition to 6 per cent, or so which the animals retain. This 



