Which method is effective for reducing soil erosion?

Implementing contour plowing to follow land contours is an effective method for reducing soil erosion because it works by aligning the plowing and planting with the natural contours of the land. This technique creates furrows that act as small barriers, which slows down water runoff and allows more water to infiltrate the soil. By doing so, it minimizes the potential for soil particles to be washed away during rain events, thereby protecting the soil structure and maintaining its fertility.

In contrast, tiered farming systems may help in specific contexts but do not directly address the mechanics of erosion control like contour plowing does. Increasing the slope of cultivated fields typically exacerbates erosion issues, as steeper slopes result in faster runoff, increasing the likelihood of soil loss. Reducing plant cover on slopes would leave soil vulnerable to erosion, as plant roots help stabilize the soil and provide protection against the impact of raindrops and runoff. Hence, contour plowing stands out as a targeted approach to effectively mitigate soil erosion through careful land management.