Technical efficiency of cocoa farming in Gorontalo Province Ari Abdul Rouf, Erna Retnawati, Dwi Rohmadi, Soimah Munawaroh and Awaludin Hipi E3S Web Conf., 232 (2021) 01027 Published online: 25 January 2021 DOI: 10.1051/e3sconf/202123201027