Root Biomass Estimation in Natural and Planted Mangrove Nasir Sudirman, Terry Louise Kepel, Restu Nur Afi Ati, Mariska A. Kusumaningtyas and Hadiwijaya Lesmana Salim E3S Web Conf., 324 (2021) 03014 Published online: 16 November 2021 DOI: 10.1051/e3sconf/202132403014