Effects of Organic Fertilizer Application and Spatial Arrangement on the Growth of Zingiber officinale var. amarum in Oil Palm Polyculture SystemsFitri Ramadhani, Marlina, M. Umar Harun, Dedik Budianta, Indri Fariroh, Strayker Ali Muda, Habibulloh, Muhardianto Cahya and Fitra Fadhilah RizarBIO Web Conf., 246 (2026) 00012DOI: https://doi.org/10.1051/bioconf/202624600012