“THE CHANGE OF SANDY SOIL PROPERTIES AFTER ADDING CHARCOAL PRODUCED FROM A TRADITIONAL KILN IN THE MEKONG DELTA, VIET NAM” (2021) TẠP CHÍ KHOA HỌC TRƯỜNG ĐẠI HỌC TRÀ VINH, 1(42), pp. 109–115. Available at: https://journal.tvu.edu.vn/vi/index.php/tckh/article/view/25 (Accessed: 21 January 2026).