410 



Feeds and Feeding. 



lessened 0.6 to 2.1 Ibs. daily. One pound of concentrates in the 

 form of grain, bran, and oil cake proved equal to 10 Ibs. of mangels. 

 The water content of the milk was not materially changed by feed- 

 ing varying quantities of roots. Indeed the cows eating the largest 

 quantity of roots gave the richest milk. These extensive experiments 

 prove, beyond question, that the milk of the cow cannot be watered 

 by feeding roots. (275-6) 



661. Roots v. concentrates. Friis of the Copenhagen (Denmark) 

 Station 1 conducted feeding trials on 6 different farms with 4 lots of 

 10 to 12 cows each in the following manner: All received the same 

 basal ration, consisting of 6.5 Ibs. of hay and 10 Ibs. of straw. The 

 concentrates consisted of a mixture of barley, oats, and rye with 

 cotton-seed meal. Each cow received at least 4.5 Ibs. of dry matter 

 in the form of mangels. Three Ibs. of cotton-seed meal was withheld 

 from the ration of Lot III, and in its stead sufficient mangels were 

 supplied to furnish 3 Ibs. of dry matter. With Lot IV, 3 Ibs. of 

 cereal grains was withheld and 3 Ibs. of dry matter supplied in 

 mangels. 



Substituting roots in part for grain in the ration for dairy cows. 



It will be seen that when 3 Ibs. of grain or cotton-seed meal re- 

 placed an equal amount of dry matter in the form of mangels, there 

 was an increase rather than a decrease in the milk flow. From this 

 and other feeding trials the conclusion was drawn that for cows 1 Ib. 

 of dry matter in roots is equal in feeding value to 1 Ib. of Indian 

 corn, mixed grains barley, oats, and rye or 0.75 Ib. of cotton-seed 

 meal. 



Wing and Savage of the Cornell Station, 2 from carefully conducted 

 experiments with dairy cows, conclude: 



That 1 Ib. of dry matter in mangels is slightly superior to 1 Ib. of 

 drv matter in corn silaere. 



1 Expt. Sta. Rec., 14, 1903, p. 801; Landokon. Forsog (Copenhagen), 1902, p. 30. 



2 Bui. 268. 



