Effects of breed, season of lambing and fecundity level on production per ewe and per hectare

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Abstract
Production per ewe and output per hectare were measured from the ewes of self-replacing, wool sheep flocks, stocked at 500 kg liveweight/ha on mixed annual-perennial pasture species in a temperate zone with 700 mm annual winter rainfall, near Hamilton in Victoria. Ewes of 2 breeds, a small body-sized, fine wool (20 pm) Merino and a larger body-sized, medium wool (23 pm) comeback, were compared at 2 lambing seasons (May or August) and at 2 levels of fecundity (natural or enhanced) from 1982 to 1985. Supplements were fed to prevent nutritional stress. Comeback ewes were about 10% heavier (P

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