Pengaruh Variasi Kecepatan Putaran Terhadap Fertilitas, Mortalitas, Dan Daya Tetas Telur Bebek (Anas Platyrhynchos Domesticus) Pada Mesin Penetas Telur Otomati: The Effect of Rotation Speed Variation on Fertility, Mortality, and Hatchability of Duck Eggs (Anas Platyrhynchos Domesticus) in an Automatic Incubator Machine . JBETA 2025, 13 (2), 250-257. https://doi.org/10.24843/j.beta.2025.v13.i02.p06.