304 



The Fixation of Nitrogen in Faeces 



while the grass fed cow dungs used in the preceding experiment all 

 gave negative results. 



Fixation of Nitrogen in Cow faeces {cake fed). 



Effect of diet on Nitrogen fixaition 



<x) 50-' 



^ 



M 



2-10-, 



Morse on Bullock 

 co»»n &. oT\ c&ke 



>)a,y. & gr&ss. 



HoY"5e Cow on BuUock 



on caKe & ot^ 



qr»&ss gr^ss. grass 



Fig. 1. 



Cow 



on 

 grass. 



Fig. 1 shows diagrammatical ly the effect of diet on the nitrogen fixing 

 power of faeces from the horse, bullock and cow. 



Before turning to the bacteriological aspect of these nitrogen changes, 

 there is one other point which may or may not have any direct con- 

 nection with the fixation of atmospheric nitrogen that is undoubtedly 

 associated with normal horse faeces under conditions not very different 

 from those operative in the field. 



