MATTUAL OF CATTLE-FEEDUSTG. 



859 





Nitrogen of 

 iuBohible 



alburmnoids. 

 X\^r cent. 



Nitroj?en of 



fiolublp 



albuimuoids. 



I'er cent. 



Nitroprcn of 



nmidoB. 



Per cent. 



Nitroj^en of un- 

 known com- 

 pounds. 

 Per cent. 



I. 



0.069 

 0.046 

 0.058 

 0.047 

 0.087 



0.143 

 0.157 

 0.080 

 0.115 

 0,147 



0.135 

 0.118 

 0.143 

 0.150 

 0.100 



012 



II., 



0.019 



Ill 



IV 



0,010 

 0.024 



V 



0.026 







The distribution of tlie nitrogen between protein and 

 non-pi'otein was, therefore : 





Protein. 

 Per cent. 



Non protem. 

 Per cent. 



1 



Protein. 

 Per cent. 



Non-protein. 

 Per cent. 



I 



60.7 

 59 7 



47.4 



39.3 

 40.3 

 52.6 



iiv 



48.2 

 65.2 



51.8 



II 



iV 



34.8 



Ill 











Beets and potatoes appear to be the only root-crops 

 whose nitrogenous constituents have been investigated, but 

 it is highly probable that other roots and tubers also con- 

 tain considerable amounts of amides. Naturally, the bye- 

 pi'oducts, such as " potato slump," beet-root molasses, etc., 

 are also liable to contain the same or derived bodies. 



Tubers. — ^Potatoes. — The composition of potatoes is 

 largely determined by the variety and by various ex- 

 ternal circumstances, such as soil, weather, and manuring. 

 They may contain from 18 to 30 per cent, of dry matter, 

 from 1.3 to 4.5 per cent, of protein, and from 12 to 27 per 

 cent, of starch. 



The richer a potato is in starch the poorer it generally 



