To determine the characteristics of runoff generation and soil erosion at the different ages of Acacia plantation in Luong Son headwater of Vietnam, four plots (15m2 plot-1 ) were set up. Of those, two plots were at up-hill and down-hill in 1-year-old and two plots in 5-years-old Acacia plantation. | Runoff generation and soil erosion at different age of acacia plantation in Hoa Binh province, Vietnam