Improving the productivity of Joper chickens with fermented soy milk waste (SMW) Nining Haryuni, Yuli Arif Tribudi, Niswatin Hasanah and Ragil Angga Prastya BIO Web Conf., 88 (2024) 00043 Published online: 22 January 2024 DOI: 10.1051/bioconf/20248800043