Substitution of Roots for Concentrated Foods. 



487 



Table XXVIII. 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 with the Smaller Amount of Grain. 



Group 



D 

 D 

 D 



B 

 B 

 B 

 B 



C 

 C 

 C 

 C 



D 

 D 

 D 

 D 



Cow 



Glista Epsilon. 

 Glista Lambda. 

 Glista Theta . . . 



Glista Oinicron. 

 Glista Sigma. . . 



Gipsy 



Gwyn of O. H. . 



Glista Alpha. . . 

 Glista Delta . . , 



Zelma 



Hector's Berta. 



Glista Epsilon. , 

 Glista Lambda. 

 Glista Omega . . 

 Garnet Delta . . 



Average . 



Year 



First 

 First 

 First 



Second 

 Second 

 Second 

 Second 



Second 

 Second 

 Second 

 Second 



Second 

 Second 

 Second 

 Second 



Periods 

 compared 



I & 2 

 I & 2 



I & 2 



& 

 & 

 & 

 & 



& 

 & 

 & 

 & 



I & 3 



I & 3 



I & 3 



I &3 



Cost 



of one 



pound 



fat with 



ration II 



.297 

 .299 

 •311 



.282 

 .260 



•243 

 .184 



.268 

 .208 

 . 227 

 •233 



.320 

 .279 



■315 

 ■293 



268 



Cost 



of one 



pound 



fat with 



ration III 



. 224 

 . 224 

 •239 



.219 

 . 201 

 . 229 



. 148 



. 198 

 .179 

 .197 

 , 206 



, 222 



173 

 244 

 216 



208 



Average of check groups for both years .206. 



of dry matter in grain when mangels are fed for succulence with the full 

 grain ration, it also is not economical to feed ration II with mangels 

 at $4.50 per ton, whereas it seems to be economical to feed ration III, 

 even with mangels costing $4.50 per ton. 



As a further comparison of the value of dry matter in rations II and 

 III, Tables XXI and XXII may be studied. Here it is found that 

 with ration II, 20.93 pounds of total dry matter and 7.57 pounds of 

 dry matter in the grain are required for the production of one pound 

 of butter fat, while with ration III, 22.02 pounds of total dry inatter 

 and 8.62 pounds of dry matter in the grain are required for the pro- 

 duction of one pound of butter fat. With the check group for both 

 years, the requirement for the production of one pound of butter fat 

 was 22.05 pounds of total dry matter, and 8.33 pounds of dry matter 

 in the grain. These averages show that while the dry matter was not 

 so efficient in ration III as in ration II, yet it was practically as efficient 

 as the dry matter in ration I fed to the check group both years. 



