Widowati, Sutoyo, H. . Karamina, and W. . Fikrinda. “Biochar and Organic Fertilizer Utilization in Enhancing Corn Yield on Various Types of Dryland”. Agriculture and Natural Resources, vol. 54, no. 6, Dec. 2020, pp. 665–672, https://li01.tci-thaijo.org/index.php/anres/article/view/248680.