Yields of Guernsey Heifers Compared 
With Mature Cows. | 
By Gly VBeacn: 
In Table No. 2 are exhibited the official milk and fat yieid 
of four hundred cows and heifers, classified according to age. 
The two-year-old class averaged 352.8 pounds of butter-fat ; 
the three-year-old class 403.9 pounds; the four-year-old class. 
433.5 pounds ; the mature form class (five years old and over ) 
averaged 455.7 pounds of butter-fat in one year. The two- 
year-old class averaged (352.8+448.4=.774) 77.4%; the three- 
year-old class 88.6%, and the four-year-old class 95.1% of the 
yield of those five years old and over. | 
The requirements for admission to the Guernsey Advanced 
Registry is 250.5 pounds of fat if the record is commenced _ 
the day the animal is two years old or previous to that age. 
For each day the animal is over two years old at the begin- 
ning of the year’s record, the amount of butter-fat she will be 
‘required to produce in the year will be established by adding 
one-tenth of a pound for each such day to the 250.5 pounds. 
required wher two years old. 
This ratio is applicable until the animal is five years old, 
when the required amount will have reached 360 pounds, 
which will be the amount of butter-fat required of all cows 
five years old or over. | 
