EXPERIMENT STATION BULLETINS. 157 



This table shows, on an average taken from fourteen cows in two 

 four-weeks feeding periods, that the addition of twenty pounds of roots 

 to the daily ration increased the milk production 10.75 lbs. per week, 

 and the butter fat production .413 lb. per week, but the cost of the 

 ration was increased 12.4 cents per week; the cost of 100 lbs. milk in- 

 creased 3.1 cents, and butter fat cost 0.91 cent more per pound than on 

 the ration containing no roots. 



WEIGHTS. 



Average weight 14 cows at start of root ration 985 . 5 lbs. 



Average weight 14 cows at close of root ration 993 . 2 lbs. 



Average gain per cow in four weeks on roots 7.7 lbs. 



Average weight 14 cows at start of ration without roots .... 1006 . lbs. 

 Average weight 14 cows at close of ration without roots. . . . 975.3 lbs. 



Avg. loss per cow in four weeks on ration without roots 30.7 lbs. 



The root ration, therefore, seemed to keep the cows in somewhat bet- 

 ter condition of flesh, as a considerable loss in weight followed the re- 

 moval of roots from the ration. 



FEEDING TRIAL — NUMBER THREE. 



This was carried out in the spring of 1906 with two lots of five cows 

 each, selected from Grade Herd 'No. 2. As in the two experiments re- 

 ported above, precautions were taken to divide the lots as evenly as pos- 

 sible from previous production and period of lactation. All ten cows had 

 been on the same feed up to the beginning of the test, namely, silage, 

 clover hay, and grain, and were continued on the same ration throughout 

 the experiment, except for the addition of 20 lbs. of roots per head daily 

 to Lot 1 during the first four weeks, and the same to Lot 2 during the 

 second period of four weeks. 



The roots were fed twice daily, 10 lbs. at a feed. 



Lot 1 consisted of Nos. 11, 12, 13, 14, 16, and Lot 2 of Nos. 15, 17, 18, 

 19 and 20. 



The average rations consumed per head daily for the two lots follow: 



, Lot 1. 



First Period. Second Period. 



Silage '. . . 24. lbs. 25.2 lbs. 



Hay 6.8 lbs. 6.0 lbs. , 



Grain 8.5 lbs. 8.5 lbs. 



Roots 20.0 lbs 



Lot. 2. 



First Period. Second Period. 



Silage 25.5 lbs. 25.3 lbs. 



Hay 6.8 lbs. 6.0 lbs. 



Grain 8.8 lbs. 8.8 lbs. 



Roots . 20.0 lbs. 



