Substitution of Roots for Concentrated Foods. 



453 



The nutritive ratio of the above ration is 1:5.6. With ration I, the 

 amount of grain fed per day varied with the needs of each cow, accord- 

 ing to her size and production, from 8 to 14 pounds. The hay and 

 grain varied a Httle with some individuals. 



Ration II, first year. In ration II, mangels are substituted for silage 

 and the same grain mixtures, i and 2, are used as in ration I. Ration 

 II was used to compare the value of dry matter in mangels with the dry 

 matter in silage. This ration, as computed for a 1000-pound animal, 

 would be as follows : 



Ration II. First Year (1907-1908) 



2.79 



The nutritive ratio of the above ration is approximately i :5. The 

 amount of grain, hay and mangels varied with the individual cows 

 somewhat as with ration I, but the above ration was adhered to as 

 closely as possible. 



Ration III, first year. In ration III, the grain was reduced about 

 one-half and its place taken by mangels, in order to compare the feeding 

 value of the dry matter in mangels with the dry matter in grain. The 

 amounts of hay and silage were approximately the same as in ration 

 I. Ration III computed for a 1000-pound animal would be: 



Ration III. First Year (1907-1908) 



Food 



10 pounds hay 



30 



50 



2 



I . 2 



.8 



silage 



mangels 



Ajax flakes 



corn-meal 



cottonseed-meal 



Total 23 . 03 



Dry 



matter 



lbs. 



8.57 

 6.27 



4-55 

 I .84 

 I .07 



•73 



Dig. 

 protein 



lbs. 

 •54 

 ■36 

 •50 

 •43 

 . 10 



■25 



2 . l! 



Dig. 

 fiber 



lbs. 



1-43 

 I . 29 



■25 

 . 12 

 .01 

 .01 



Dig. 

 N. F. E. 



lbs. 



274 

 1 . 22 



>.65 

 .70 



•77 

 .09 



9.17 



Dig. 



fat 



lbs. 

 .16 

 .18 



■05 

 . 21 



.06 

 . 10 



76 



3. II + 9.17 -I- (.76 X 2j) 



2.18 



=6.4 



