The ability of a hen to maintain regular egg production throughout as long a laying year as possible.
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The ability of a hen to maintain regular egg production throughout as long a laying year as possible.
An elongated structure of pale yolk extending into the interior of the yolk.
A reduced metabolic activity of the embryo in the egg caused by cooling below 16...
Ability of female birds to lay eggs.
A laying series (clutch) together with the subsequent pause.
The period during which a layer is producing eggs; duration depends mainly on sp...
A utility type characterized by a light body, high egg production, and high egg ...