Substitution of Roots for Concentilvted Foods. 



455 



The nutritive ratio of the above ration is i :6.4. The grain mixtures 

 were the same in this ration as in ration I. 



Alternation of rations fed the first year. Rations I, II and III were 

 fed to the four groups of cows, A, B, C, and D, in the following order 

 during 1907-8: 



Alternation of Rations During 1907-1908 



Group A (check) , 



Group B 



Group C 



Group D 



First 

 feeding period 



Ration I 

 Ration I 

 Ration II 

 Ration III 



Second 

 feeding period 



Ration I 

 Ration III 

 Ration I 

 Ration II 



This arrangement admitted of the following comparisons: In Group 

 B, dry matter in grain with dry matter in mangels; in Group C, dry 

 matter in silage with dry matter in mangels; in Group D, dry matter 

 in grain with dry matter in mangels, with mangels for succulence in 

 place of silage when the large grain ration was fed. The results of these 

 comparisons are given later in connection with the results obtained 

 from the work the second year (1908-9), 



Rations fed the second year. The rations fed the second year were 

 planned in the same way as the rations fed the first year, except that 

 in ration III the mangels were decreased somewhat. The grain mix- 

 ture for the second year was made up differently, mainly because the 

 feeds could be more easily obtained. The same grain mixture was 

 fed through all three periods and was made up as follows for each 200 

 pounds: 100 pounds Ajax flakes, 40 pounds buckwheat-middlings, 

 20 pounds corn-meal, 20 pounds wheat-bran, 20 pounds oil-meal. 



' Ration I. Second Year (1908-1909) 



Food 



Dry 



matter 



Dig. 

 protein 



Dig. 

 fiber 



Dig. 

 N. F. E. 



Dig. 

 fat 



10 



35 

 4.0 



pounds hay. 

 silage 



lbs. 

 8-57 



Ajax flakes 



buckwheat-middhngs. . 



corn-meal 



wheat-bran 



oil-meal 



32 

 68 



39 



71 

 70 



73 



lbs. 



•54 

 .42 



•85 



•35 

 .07 

 . 1 1 

 . 22 



lbs. 



1-43 



I-5I 

 •23 



.or 

 .01 

 .04 



lbs. 

 2.74 



59 

 40 



53 

 51 

 34 

 22 



lbs. 

 .16 

 .21 

 .42 

 .09 

 .04 



•03 

 .06 



Total . 



23.10 



2.56 



3^23 



8.33 



1 .01 



3^23 + 8.33 + (l.OI X 2\) 

 2.56 



The nutritive ratio of this ration is 1 15.4. 



5-4 



