HOW INDIVIDUAL SELECTION IS MADE 



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When complete milk records are kept, as is recommended, it 

 is sufficient to take a sample covering from three to five days 

 each month for the butter-fat test. The best plan is to take a 

 mixed or composite sample, as it is called, for three days in the 

 middle of the month. This is tested for butter fat, and the 

 result counted as the average for the month. 



Monthly Tests. Another plan of keeping records of in- 

 dividual cows, which is well adapted for use by those who feel 

 they cannot spend the time necessary to take daily milk 



FIG. 33. Form for keeping milk records, weighing three days per month. 



