SILAGE STUDIES 55 



the dry fodder. These changes are neglected in the compari- 

 son, since they were the common coarse fodders of the farm, 

 with no clover to introduce marked variations in protein. 

 The grain consisted of, — 



TOO lbs. wheat middlings, 50 lbs. wheat bran. 



TOO lbs. Buffalo gluten feed, and 150 lbs. cotton-seed meal. 



The groups of cows whicli continued throughout four 

 periods were as follows : 



Group A. Three Ayrshires. 



Ration : 120 lbs. silage, 21 lbs. dry fodder, 26 lbs. grain. 

 Group D. Three Durhams and one Holstein. 



Ration : 160 lbs. silage, 28 lbs. dry fodder, 32 lbs. grain. 

 Group J. Five Jerseys and one Guernsey. 



Ration : 210 lbs. silage, 40 lbs. dry fodder, 54 lbs. grain. 



The different varieties of silage were fed during these 

 periods in the following order : 



Mosby's Prolific, Jan. 16 to Feb. 3, 19 days. 

 Sanford, Feb. 4 to Feb. 25, 22 days. 

 Learning, Feb. 26 to March 23, 26 days. 

 Sanford, March 24 to April 13, 21 days. 



A group of three new milch cows (Group N), two Ayr- 

 shires and one Jersey, was fed from Feb. 26 to April 13, or 

 two periods, with a daily ration of 120 lbs. silage, 21 lbs. dry 

 fodder, and 30 lbs. grain. 



Group D continued but seven days in the fourth period, 

 and Group J stopped at the end of thirteen days. 



The average daily milk yield per cow for each period with 

 the different groups is shown in the following statement, 

 together with the average daily shrinkages : 



Group A, 



Mosby, 19 days, average yield, 27.5 lbs. 



Sanford, 22 days, average yield, 25.5 lbs.; average shrinkage, 2.0 lbs. 

 Learning, 26 days, average yield, 22.9 lbs.; average shrinkage, 2.6 lbs. 

 Sanford, 21 days, average yield, 20.9 lbs.; average shrinkage, 2.0 lbs. 



Group D. 



Mosby, 19 days, average yield, 17. i lbs. 



Sanford, 22 days, average yield, 17.1 lbs.; average shrinkage, nothing. 

 Learning, 26 days, average yield, 15.4 lbs.; average shrinkage, 1.7 lbs. 

 Sanford, 7 days, average yield, 15.4 lbs.; average shrinkage, nothing. 



