The effect of local-based feed ration on the production and quality of duck eggs in Tanjungpinang, Riau IslandsSalfina Nurdin Ahmad, Yeni Yusriani, Apriyani Nur Sariffudin, Khoiru Rizqy Rambe, Annisa Dhienar Alifia, Irma Oktavia and Sugeng WidodoE3S Web Conf., 306 (2021) 02024DOI: https://doi.org/10.1051/e3sconf/202130602024