Yes, agricultural plastic mulch can be used to prevent soil erosion. It helps by reducing the impact of raindrops on the soil surface, thus decreasing the detachment and splashing of soil particles. The mulch also slows down the velocity of surface runoff, which is a major factor in soil erosion. By reducing runoff velocity, plastic mulch can minimize the erosion process. Additionally, it can improve soil structure and fertility, which indirectly contributes to better soil stability and reduced erosion. However, it's important to note that plastic mulch is not a complete solution and should be used in conjunction with other erosion control practices.