484 



Bulletin 268. 



obtained in this experiment that one pound of dry matter in mangels 

 is equal to one pound of dry matter in grain as far as its feeding value 

 is concerned in the production of milk. 



As a further light on this comparison, Plates I and II may be studied, 

 where the results are plotted graphically. In all cases, during the 

 second year the production was maintained fully as well as when ration 

 I was fed in the check groups. During the first year there appears 

 to have been a gain in production when Group B was fed ration III 

 in the second feeding period. This is not a true gain in production, 

 however, since a cow was substituted for the one which was with- 

 drawn, as noted in the table on page. 450. The substituted cow was 

 a heavier producer, so that the rise hi production in the chart is not due 

 to the ration. The production was plotted with this substitution, 

 however, to show that the average production did not decrease to any 

 appreciable extent during the feeding of the different rations. 



Cost of one pound of butter fat with ration III as compared with ration 

 I. Table XXVI has been prepared from Tables- VI, XIV, XV, and XVI, 



Table XXVI. Dry Matter in Mangels and Grain Compared on the Basis 

 OF THE Cost of a Pound of Fat When the Grain is Replaced by Mangels 

 Silage Being Fed for Succulence in Each Case. 



Group 



B 

 B 

 B 

 B 



B 

 B 

 B 

 B 



C 

 C 

 C 

 C 



D 

 D 

 D 

 D 



Cow 



Lina 



Glista Mu 



Glista Omicron. 

 Delia 



Glista Omicron. 

 Glista Sigma . . . 



Gipsy 



Gwyn 



Glista Alpha. . . 

 Glista Delta . . . 



Zelma 



Hector's Berta. 



Glista Epsilon. . 

 Glista Lambda. 

 Glista Omega , . 

 Garnet Delta . . 



Average . 



Year 



First 

 First 

 First 

 First 



Second 

 Second 

 Second 

 Second 



Second 

 Second 

 Second 

 Second 



Second 

 Second 

 Second 

 Second 



^ Periods 

 compared 



I & 2 



I & 2 



I & 2 



I & 2 



& 



& 

 & 

 & 



& 

 & 

 & 

 & 



1 & 2 



I & 2 



I & 2 



I & 2 



Cost 



of one 



pound 



fat with 



ration I 



•152 

 . 172 



■243 

 ,179 



. 221 

 . 204 

 .211 

 .138 



, 217 

 . 211 

 ,189 

 , 214 



233 



229 



, 220 



205 



, 202 



Cost 



of one 



pound 



fat with 



ration III 



.184 

 .225 

 ■258 

 . 216 



. 219 



. 201 

 . 229 

 .148 



.198 

 .179 

 .197 

 . 206 



. 222 



•173 

 .244 



. 216 



, 207 



Average of check groups both years .206. 



