What impact does soil erosion have on nutrient management?

Soil erosion plays a critical role in nutrient management primarily because it leads to the loss of topsoil and vital nutrients essential for plant growth. Topsoil is the uppermost layer of soil, rich in organic matter and nutrients that plants rely on for sustenance. When erosion occurs, whether from water or wind, this layer is removed, resulting not only in the depletion of nutrients but also in diminished soil health and fertility.

The loss of topsoil is particularly concerning because it not only reduces the soil's nutrient content but also affects its structure and capacity to retain moisture, which can further impair plant health and crop yields. Without adequate management practices to mitigate erosion, land may become less productive, leading to long-term consequences for agricultural sustainability.

Other choices suggest improvements or no impact, which is contrary to the well-documented effects of soil erosion. Through sound nutrient management practices, it is essential to address erosion to maintain soil health and ensure sustainable agricultural practices, therefore highlighting the importance of choice B as the correct answer.