Impact of Young Coconut Waste Biochar on Growth Response of Mustard (Brassica rapa subsp. chinensis var. Samhong King)Ramadhan Rizqi, Zaitun Zaitun, Rahmawati Marai, Andari Dwi Surya, Putri Syabila Natasya and Ramadhani Azzahna SalsabilaBIO Web Conf., 246 (2026) 00008DOI: https://doi.org/10.1051/bioconf/202624600008