48o 



Bulletin 268, 



Table XXIV. Dry Matter in Silage and Mangels Compared on the Basis 

 OF the Cost of One Pound of Fat in Each Case. 



Group 



Cow 



Year 



Periods 

 compared 



Cost 



01 one 



pound 



fat with 



ration I 



Cost 

 of one 

 pound 



fat with 

 ration II 



C 

 C 

 C 

 C 

 C 



B 

 B 

 B 

 B 



C 

 C 

 C 

 C 



D 

 D 

 D 

 D 



GHsta Delta . . , 

 GHsta Alpha . , 



Zelma 



Hector's Berta . 

 Ida Peri 



Glista Omicron. 

 Glista Sigma. . . 



Gipsy 



Gwyn 



Glista Alpha. . . 

 Glista Delta . . . 



Zelma 



Hector's Berta. 



Glista Epsilon. , 

 Glista Lambda. 

 Glista Omega . . 

 Garnet Delta . . 



First 

 First 

 First 

 First 

 First 



Second 

 Second 

 Second 

 Second 



Second 

 Second 

 Second 

 Second 



Second 

 Second 

 Second 

 Second 



I & 2 



I & 2 



I & 2 



I & 2 



I & 2 



1 & 2 



I & 2 



I & 2 



I & 2 



& 

 & 

 & 

 & 



& 

 & 

 & 

 & 



.185 

 . 192 

 . 209 

 .171 

 •353 



. 221 

 . 204 

 .211 

 .138 



.217 

 .211 

 .189 

 .214 



•233 

 . 229 

 . 220 



.205 



.248 

 .284 



■3H 

 .285 



•503 



.282 

 .260 



• 243 

 .184 



.268 

 .208 

 .227 



•233 



.320 



•279 

 •315 

 •293 



Average . 



212 



279 



Average of check groups at same time .206. 



(2) Comparison of dry matter in grain and in mangels 



Little work has been done at the experiment stations in the United 

 States in comparing the value of dry matter in coarse foods with the dry 

 matter in grain. Only two valuable experiments of this kind have been 

 reported in the Experiment Station Record; one at the Ohio Station, 

 in which silage was substituted for grain, and the other the Danish 

 experiment mentioned earlier in this bulletin. 



The Oliio experiment* The object of this experiment was to determine 

 whether silage could be substituted for a considerable part of the grain 

 usually fed to dairy cows. Two rations were fed, carrying practically 

 the same amounts of dry matter. In one, over' 50% of the dry matter 

 was derived from silage and less than 18% was derived from grain; 

 in the other, over 57% of the dry matter was derived from grain, no 

 silage being fed. The cows fed silage produced 96.7 pounds of milk 

 and 5.08 pounds of butter fat per 100 pounds of dry matter. The cows 

 fed the heavy grain ration produced 81.3 pounds of milk and 3.9 pounds 



* Ohio Station Bulletin 155. Pages 63-80. 



