lasandrang, salawati, and S. . Ende. “The Use of Rice Husk Biochar and Flooding System on Rice Production in Central of Sulawesi Indonesia”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 48, no. 5, Nov. 2019, pp. 185-9, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/10394.