Dec. 1, 1919 Nitrogen Metabolism of Two- Year-Old Steers 



251 



in live weight. Steer 663 of this lot went off feed and had to be removed 

 from the experiment at the end of the thirtieth week. 



The relation between the nitrogen consumption and nitrogen balance 

 was about the same as in the preceding lots, with more numerous and 

 more striking irregularities. The nitrogen balance was generally greater 

 than in the two-thirds feed lot, although there were many weeks when the 

 reverse was true. 





...... ,. 



/ \ 



^i 



y"^"^ 



A 



\' 



7^ 



jz anc «c -J 



i-^r 



v^ 



re o e a x> /^ /^ /s /a ^o gg z^ 2s z s Vo jig jy jg jy ' ^ 

 Fig. 4.— Nitrogen metabolism of steers in the full feed lot. 



PERCENTAGE OF PROTEIN IN GAIN 



In an experiment covering the length of time of this one it is reason- 

 ably accurate to calculate the percentage of protein in the total gain in 

 live weight from the amount of nitrogen stored and the increase in live 

 weight. This is particularly true when one considers the entire experi- 

 ment of 37 weeks. The results are given in Table VI. 



