Time estimation for mating peak and calving of Bali cattle in semi-arid area in Netemnanu village Kupang district

Bali cattle have advantages in terms of adaptation and fertilization rates, but tend to slow growth rate because the rearing system is still grazing so that livestock becomes uncontrollable. This study aims determine peak mating calving estimation (Bos sondaicus) did not experience reproductive disorders, aged 4-7 years, belonging smallholder farmers. The were reared semi-arid area Netemnanu village, South Amfoang district, Kupang regency, Nusa Tenggara Timur. method used was interviews with farmers, diagnosis pregnancy through rectal palpation ultrasonography. results showed 86.20% (50/58). Based on data, it known would occur December 2021 estimated reach its September 2022.