New York Agricultural Experiment Station. 459 



In table XII are the data from two feeding periods which show 

 the results accompanying a change in the ration from oat-and-pea 

 fodder and hay to alfalfa fodder and corn silage, which without 

 much other change in the ration considerably widened the nutritive 

 ratio. Twelve cows were used of the average age of three years 

 They had been in milk on the average about 6.3 months at the be- 

 ginning of this trial. 



From July 1st to 15th oat-and-pea fodder was fed morning 

 and noon and clover hay at night. The mixed grain, No. 17, which 

 was fed during both periods, consisted of five parts corn meal and 

 four parts each of ground oats and wheat bran. The green fodder 

 represented 23.9 per cent, of the cost of the ration and the grain 

 52.0 per cent. The green fodder supplied 40.3 per cent, of the 

 total digestible nutrients and the grain supplied 37.4 per cent. 



From July 16th to 31st corn silage was fed morning and noon 

 and alfalfa fodder at night. The silage and green fodder represented 

 44.9 per cent, of the cost of the ration and the grain 55.1 per cent. 

 The silage and green fodder supplied 60.4 per cent, of the total 

 digestible nutrients and the grain 39.6 per cent. 



There was an average loss in weight per cow of about 4 pounds 

 during the month. For the first period the greatest daily aver- 

 age yield of milk was 31.1 pounds and the smallest 9.9 pounds. The 

 highest average percentage of fat was 5.70 and the lowest 2.30. For 

 the second period the extremes in daily average milk yield were 

 31.2 pounds and 9.5 pounds, and in average percentage of fat 5.50 

 and 2.40. 



