DAIRY, SEED IMPROVEMENT, STOCK BREEDERS MEETINGS. 21/ 



COMPARISON OF AMERICAN ADVANCED REGISTRY AYRSHIRES 



WITH AYRSHIRES IN SCOTI^AND IN RESPECT 



TO MILK PRODUCTION. 



As set forth in our last report, the records furnished by the 

 Scottish Milk Records Society have been the basis of our study 

 of Ayrshire milk production. These records, it will be recalled, 

 correspond to American cow-test association records in this 

 particular, that the records pi oil cows in each herd, good, bad, 

 and indifferent, are included. During this past year we have 

 been able, through the kindness of Dr. J. A. 'Ness, President of 

 the Ayrshire Breeders' Association, and C. M. Winslow, Secre- 

 tary, to compare the American Advanced Registry Ayrshire 

 records with these Scottish records. The results of such com- 

 parison, in part, are shown in Table i. 



Table i. 



Comparing Mean Weekly Yields (in Gallons) of (a) American 



Advanced Registry^ and (b) Scottish Milk Record 



Society Ayrshire Cows. 



Age of Cow. 



American 



advanced 



registry. 



Scottish milk 

 records 

 society. 



Difference. 



Two years. . 

 Three years 

 Four years. . 

 ''Mature". . 



14.84±.08 

 16.76±.14 

 17.47±.14 

 20.32 ±.13 



13.61 ±.18 

 13.84 ±.04 

 15.23 ±.06 

 18.56±.093 



1.23 

 2.92 



2.24 

 1.76 



SThis figure is for 9- year-old cows. 



From this table it will be seen that the American Advanced 

 Registry Ayrshires outyield their Scottish sisters, on the aver- 

 age, from about one and a quarter gallons to three gallons per 

 week, or roughly, from ten to 25 pounds. Looked at from a 

 relative standpoint it appears . that the American Advanced 

 Registry animals give, as two-year-old heifers or as mature 

 cows, about nine per cent on the average more milk than the 

 Scottish herds. For the three year and four year ages the per- 

 centage is higher. 



The standards for admission to advanced registry are just 

 as high for the Ayrshire as for any other breed. It appears a 

 fair question as to whether a standard which runs less than ten 



