The potential of rice husk-derived biochar as a bio-silica source in the agricultural area of Tuban, East JavaNur Azmina Aisyah, Indah Trisnawati, Mukhammad Muryono and Tran Thi Huong SenBIO Web Conf., 202 (2025) 01003DOI: https://doi.org/10.1051/bioconf/202520201003