How do agricultural plastic mulch reduce soil erosion?

Agricultural plastic mulch reduces soil erosion by providing a physical barrier on the soil surface. This barrier prevents raindrops from directly impacting the soil, thereby reducing the splash erosion that can dislodge soil particles. Additionally, the mulch helps to slow down the velocity of water runoff, which decreases the erosive force of the water. By retaining moisture in the soil, plastic mulch also reduces the need for tillage, which can lead to soil compaction and erosion. Furthermore, mulch can enhance soil structure by improving aggregation, which in turn increases the soil's resistance to erosion. Overall, the use of plastic mulch can be an effective strategy for soil conservation in agricultural settings.