1921.] 



Roots v. Silage for Dairy Cows. 



621 



This experiment does not take into account the somewhat 

 greater cost of labour in feeding roots than in feeding silage. 

 On the other hand, it also does not take into account the fact 

 that if the cows give less milk, more cows are necessary to 

 produce the same quantity of milk, and this involves more 

 labour and more capital invested in the cows, buildings, &c., 

 with a correspondingly greater depreciation in value of the 

 larger number of cows necessary. 



Conclusions. — From the results of the experiment it would 

 appear that 60 lb. of oat and tare silage, fed with barley straw, 

 kale and 4 lb. of mixed concentrated foods (equal weights of 

 decorticated cotton cake and dried grains) gave about one- 

 sixth of a gallon of milk per cow daily less than 60 lb. of 

 mangolds fed with the same quantity of barley straw and kale 

 but double the concentrated foods. That is, 60 lb. of silage 

 was not equal in milk-producing capacity to 60 lb. of mangolds 

 and 4 lb. of concentrated foods. 



The cost of the silage ration, in the production of milk, how- 

 ever, was fd. per gallon less than that of the root ration. 



