station Tests vnih Feeds for Dairy Cows. 



421 



Though, the rations are not identical they so nearly coincide in 

 digestible nutrients that the results are comparable. It will be 

 seen that the cows receiving cotton-seed meal were fed slightly 

 more digestible matter with a somewhat narrower nutritive ratio. 



In these trials cotton-seed meal produced more milk than did 

 linseed meal, while the latter gave somewhat better returns in 

 butter. All things considertd, neither feed showed an advantage 

 over the other. (206-216) 



647. Oil cake compared with grain. — During feeding trials with 

 cows conducted by the Copenhagen Stationi in 1891 and 1892, 

 the comparative feeding value of grain and oil cake of various 

 kinds was studied, two hundred and forty cows on various estates 

 being used in the trials. The grain fed was a mixture of barley 

 and oats; the oil cake consisted of equal parts by weight of palm 

 nut, rape seed, and sunflower-seed cake. In each series of ex- 

 periments, three lots of cows were fed as follows: Lot I, f grain, 

 J oil cake; Lot II, \ grain, \ oil cake; Lot III, \ grain and f oil 

 cake. The yield and fat content of the milk obtained during the 

 experiments are as shown below, the iigures being the average of 

 the experiments continued for two years: 



Feeding grain and oil calce in varying proportions to 2^0 dairy cows — 

 Copenhagen {Denmark) Station. 



Lot I. 



I grain, 

 oil cake. 



Lot II. 



i grain, 

 J oil cake. 



Lot III. 



i grain, 

 I oil cake. 



Average daily milk yield, pounds- 

 Average per cent, of milk solids.... 

 Average per cent, of fat 



21.7 

 11.90 

 3.20 



22.9 

 11.85 

 3.17 



23.4 

 11.84 

 3.20 



It was shown that for each one hundred pounds of oil cake 

 substituted for the same amount of mixed grain there was a gain 

 of sixty-six pounds of milk, provided the oil cake did not con- 

 stitute more than half of the grain ration. The feeding of tl-.is 

 amount of oil cake in the ration therefore proved economical. 



648. Dned distiifery grains compared with oats. — Experinu'w s 

 were made in 1893 by Gripenberg at the Mustiala (PinlaB-J;. 



' 27th Rept. 1892. 



