76 



DAIRY FARMING 



What differences in production are found for different cows in the 

 same herd ? 



6. Define lactation period. 



7. Do you know any farmer in the region who weighs the milk 

 from each cow ? 



8. Distinguish between rich milk and high yield of butter-fat. 



9. How is milk sold in this region, by pound, quart, or on butter- 

 fat basis? 



10. What is the object of having distinct breeds and keeping 

 them pure? 



11. What is the distinction between a grade and a cross-bred 

 animal ? 



12. Who in this county owns any advanced registry cows? 



13. If a Jersey heifer calved at two years of age and in a year pro- 

 duced 3000 pounds of milk, testing 5 per cent fat, how much milk 

 can she be expected to produce when mature ? What will her yearly 

 production of butter-fat probably be? Compare with the average 

 for experiment station herds. Is she a good heifer? 



14. Considering the proportion of fat to remain the same when 

 the heifer becomes a cow, complete the following table. Consider 

 the average butter-fat production of the experiment station herds of 

 the breed as 100 per cent when filling the last column. Which ones 

 are good animals? 



15. From the figures given on page 17 does there seem to be any 

 danger of over-production of pure-bred cattle in the near future ? 



