Which of the following farming methods helps reduce soil erosion?

Subsistence agriculture refers to farming primarily for the farmer's family consumption rather than for sale. While it may involve some practices that can mitigate erosion, such as maintaining diverse crops, it generally lacks the systematic approach of crop rotation and can lead to soil degradation if not managed sustainably.

Deforestation involves clearing forests for agriculture or other uses, which significantly increases soil erosion. Without tree cover, the soil becomes exposed to rain and wind, leading to increased runoff and loss of topsoil. This practice is detrimental to soil health and directly contradicts the goal of reducing erosion.

Mechanized plowing utilizes machinery to prepare the soil for planting, but it can lead to increased soil compaction and erosion if not done carefully. This method often disrupts the soil structure and can lead to runoff, especially if the land is left bare between crops. It does not inherently reduce erosion like crop rotation does.