The consequences of changes in the rate of involuntary replacement on
the optimum replacement policy of dairy cows were determined by the
dynamic programming technique.
A reduction in the rate of involuntary replacement allowed a higher
voluntary replacemen trate. This increased the financial advantage
but it reduced the lengthening of the average herd life.
The sires' predicted difference for milk production had a considera
ble effect on the average herd life of the daughters. However, selection on milk production will not automatically lead to a longer
average herd life.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume IX. Breeding programs for dairy and beef cattle, water buffalo, sheep, and goats., , 95–100, 1986
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