It is shown, for a herd of Brahman cross cattle in the humid tropical lowlands of Papua New Guinea, that reducing the age of weaning from seven to four months advances the date of subsequent calving by ca 39 days. The calving interval is nevertheless always considerably shorter than that recorded from similar equatorial climates elsewhere. The 4-month calves showed an unexpected sensitivity to pasture quality, the nature of which requires further investigation.
Reproduction and calf growth in Brahman crossbred and South East Asian cattle in Papua New Guinea