PERAN TANAMAN BENGKUANG (Pachyrrhizuz erosus L.) DALAM MENDUKUNG SISTEM PERTANIAN ORGANIK ROBIATUL ADAWIYAH, TERRY PAKKI BioWallacea : Jurnal Penelitian Biologi (Journal of Biological Research) Vol. 5 No. 2 2019 DOI 10.33772/biowallacea.v5i2.5880