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The research work was carried out to evaluate the effects of age and breed on semen quality of beef bull sires. The experimental site was located at Singosari National Artificial Insemination Center, Malang, Indonesia. A total of 180 ejaculate semen which were collected from 9 beef bull sires (3...

Isnaini, N.; Wahjuningsih, S.; Ma'ruf, A.; Witayanto, D. A.
CIPAV Foundation, Cali, Colombia
Livestock Research for Rural Development, 2019, 31, 5, pp Article 78