Selecting only economically important traits should be ever producer's objective.
The use of artificial insemination sires is the most economical and productive way to increase the herd's genetic potential.
A cow's record is a measure of her genetic potential,which is modified by the environment in which she is kept.
Environmental factors that directly influence a cow's record include types of housing,milking equipment,feed and feeding veterinary care,mastitis treatment and climatic conditions.
Only through control of these factors can the true genetic ability of a cow be expressed