[911. 



PUBLIC DOCUMENT — No. 31. 



103 



Protein Balance (Pounds). 



Herd Results; Periods of Twenty-six Daya. 



Influence of Protein on Milk Yield. 

 Herd Results in Pounds. 



The average amount of dige.^tible protein fed daily to each 

 cow ill the high-protein ration was 2.41 ponnds, and the excess 

 over that reqnired for milk and maintenance was G5.3 per cent. 

 In the low-protein ration each cow received 1.96 ponnds daily, 

 and an average excess of 39 per cent, above requirements. 



Dnring the high-protein feeding the herd produced Y.4 per 

 cent, more milk than when it received the low-protein ration, 

 showing the influence of the larger amount. Whether all of 

 the milk increase was due to the extra protein consumed is 

 uncertain. The low-protein ration naturally had a wider ratio, 

 and evidently was rather better suited to fatteniing than to milk 

 |)roduction, and was indicated by the increase in live weight. 



Composition of the Herd Mill; {Per Cent.). 



