Unit 10Unit 10Dairy ScienceDairy Science
Major Uses of Dairy Major Uses of Dairy CattleCattle
U.S. Average DairyConsumption
28.8 gallons of milk26.8 pounds of cheese16 pounds of ice cream
4.3 pounds of butter4.3 pounds of yogurt
Milk ProductionMilk Production
• Selective Breeding– Choosing superior livestock to
fill herds to improve genetics
• BST Hormone– Naturally occurring– Increases milk production– Controversial
• Feeding Systems– Grazing– Lots
Milking Steps
1) Cow enters the parlor
2) Udder is cleaned and dried
3) Milking machine is attached to the teats
4) Cow is milked
5) Cow is disinfected and released to her pen
Dairy ProcessingDairy Processing• Milk
– Carefully tested– Pasteurized– Separated into cream and skim
portions• Cheese
– Americans eat 25 lbs. per year– Bacteria culture is added for
fermentation– Rennet is added to speed the
process– Ripens at specific temperature
and time