1911.1 



PUBLIC DOCUMENT — No. 31. 



89 



Average Weight of Animals and Average Digestible Nutrients in Daily 

 Rations (Pounds). 



Three of the cows varied in weight from 800 to 900 poniids, 

 and three others from 1,000 to 1,000 pounds. During the high- 

 ])rotein period the cows gained in total 101 pounds, and during 

 the ]ow-i)rotein period there was a total loss of 64 pounds. The 

 average weight of the herd during each of the two halves of the 

 experiment was substantially the same. 



The figures for digestible nutrients were secured from actual 

 analysis of the feedstuffs used, together with average diges- 

 tion coefficients, actual digestion tests not being made. The 

 total digestible nutrients consumed was the same in case of 

 each of the halves of the experiment, the difference being in 

 the excess of digestible protein and the corresponding deficit 

 of carbohydrates. The high-protein ration had evidently too 

 narrow a ratio, and the low-j^rotein ration too wide a ratio for 

 the be.st results. 



Protein Balance (Pounds). 



Character of 

 Ration. 



Cows. 



Protein 

 digested. 



Protein 

 required 

 for Main- 

 tenance. 



Protein 



contained 



in Milk 



(N.X6.25). 



Protein 

 Excess 

 over Main- 

 tenance 

 and Milk 

 Require- 

 ments. 



Hiffh protein, 



Low protein. 



Ada, 

 Una, 

 Bessie, . 

 Beautv, 

 Red, . 

 Spot, 



Ada, . 

 Una, . 

 Bessie, . 

 Beauty, 

 Red, 

 Spot, 



69.16 

 79.56 

 81.12 



84.24 

 82.16 

 82.16 



33.54 

 36.40 

 37.96 

 40.82 

 39.00 

 39.00 



14.56 

 16.38 

 15.60 

 18.98 

 19 24 

 17.94 



14.56 

 16 12 

 15.60 

 18.98 

 18.72 

 18.20 



20 31 

 18,66 

 26 03 

 22.28 

 24.26 

 28.00 



17.84 

 17.84 

 22 51 

 17.92 

 22.08 

 20.72 



34.29 

 44.52 

 39.49 

 42 98 

 .38 66 

 36.22 



1 14 



2,44 



— .15 



3.92 



-.1.80 



Total hisrh, . 

 Total low. 



Average per cow, high. 

 Average per cow, low. 



478 40 

 226.72 



79.73 

 37.79 



102.70 



102.18 



17 12 



17.03 



139.54 

 118.91 

 23 26 



19,82 



236.16 

 5.63 



39 36 

 .94 



' Calculated by allowing .7 of a pound digestible crude protein per day per 1,000 pounds live 

 weight. 



