110 Rkport of Department of Amimal Husbandry of the 



With soms reduction of nutrients. — The average of 28 records 

 which cover periods when there was a reduction of nutrients 

 with the same increase of protein as above is shown in C of 

 Table XXXI. There occurred a diminution in milk jield at 

 about half the normal rate 

 slower after the change than before. 



The gain in live weight was much 



AN INCREASE IN THE AMOUNT OF PROTEIN ABOVE 2.5 LBS. 



Only 18 records cover periods when this change in the ration 

 occurred. With half of them there was an increase of total 

 nutrients and with half a reduction. There was a more than 

 usually rapid falling off in milk for both groups. On the aver- 

 age there was a slight increase in amount of nutrients. The 

 average shrinkage in milk was twice as much as it would 

 normally be. The gain in live weight was much slower after 

 the change of ration. Little change in the cost of production 

 occurred. 



Table XXXII. — An Increase of Protein when Above 2.5 Lbs. 



Avirage of 18 rec- 

 ords from cows 

 a ve ra t; ing 5.3 

 yrs. old and 5.0 

 months in milk. 



Before 

 After 



-a 

 o 



9 



O 



a 



'"■ <-= 



^' ri Ik'fore 



^ g 

 c ™ 



P4 After 



Per 1000 Lbs Lr?E Weight. 



Total 

 digest- 

 ible or- 

 ganic 

 matter 



Lhs. 



15.4 

 16.0 



Digest- 

 ible 

 pro- 

 tein. 



Fuel 

 value. 



1,6.9. Cat 



2.52 30,759 



2.89 31,792 



Nutri- 

 tive 

 ratio. 



1:5.8 

 1:5-0 



AVERAGE Per 

 Day Per Cow. 



Milk 

 yield. 



/,6s. 



25.5 

 23.3 



Fatin 

 milk. 



Lbs. 

 1.05 



.9fi 



Fat In 

 milk. 



Per ct. 

 4.1 



4.1 



Dry 



matter In 



food for 



one lb. 



of milk 



solids. 



Lbs. 

 6.6 



7.4 



Digest- 

 ible dry 

 matter in 

 food for 

 each lb. 

 of milk 

 solids. 



Lbs. 



4 3 

 4.9 



