“Potential of Rice Husk Biochar and Bio-Oil With Varying Soaking Times As Environmentally Friendly Fertilisers to Increase Cayenne Pepper Productivity”. CHEMICA: Jurnal Teknik Kimia 12, no. 3 (January 6, 2026): 247–256. Accessed September 19, 2026. https://journal3.uad.ac.id/index.php/chemica/article/view/491.