K. Sumada, L. U. Widodo. Liquid Bio-Silica Fertilizer from Ash Solid Waste of Sugar Industry. Nusantara Sci. Tech. Proc. [Internet]. 2019 Apr. 19 [cited 2025 Jul. 30];:224-30. Available from: https://nstproceeding.com/index.php/nuscientech/article/view/104