Hartono, Arief, Budi Nugroho, and EdwarFeabri Kurniawan. 2023. “Manufacture Potassium Silicate Fertilizer Based on Quartz Sand from Bangka ”. Jurnal Ilmu Tanah Dan Lingkungan 25 (1), 19-24. https://doi.org/10.29244/jitl.25.1.19-24.