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lactation period
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dry period
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Ag science preswex

Dairy husbandry and industry

TermDefinition
lactation period 305 days
dry period 2 months
hybrid vigour crossbred offspring having improved characteristics above the average of its parents
Define BCS measure of fat cover on an animal, scale 0-5
BCS at calving 3-3.5
BCS at mating 2.5 -3.0
Qualitative milk tests Delvo test, temperature
quantitative milk test % solids, SCC, TBC
Characteristics of a good replacement heifer. healthy udder, four teats, good feet, good condition score, breed,
Mastitis Bacterial infection of the udder
gestation length of cow 283 days
Oestrous of cow 21 days
Colostrum First milk, high in antibodies, fat %4-7, protein %14-16.
Jersey low milk yield high solids content.
Holstein high yields, low solids
jersey cross intermediate yield and solids, better fertility
Factors that affect milk compsition Age, stage of lactation, breed, milking interval, health
Contaminants of milk Antibiotics, bacteria, excess water, somatic cells
Created by: mdoylepreswex
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