Which of the following is NOT a stage of soil erosion?

Soil compaction is not considered a stage of soil erosion; rather, it is a physical condition that affects the soil’s structure and porosity. Compaction occurs when soil particles are pressed together, reducing pore space, which can lead to decreased water infiltration and root growth. This can ultimately impact the soil's ability to resist erosion but does not represent a distinct stage of the erosion process.

In contrast, sheet erosion, raindrop impact, and channel erosion are all recognized stages of soil erosion. Sheet erosion refers to the removal of a thin layer of soil across a wide area, often caused by rainwater runoff. Raindrop impact is the initial process where raindrops strike the soil surface, dislodging soil particles and beginning the erosion process. Channel erosion occurs in defined spaces, such as gullies or streams, where concentrated water flow leads to increased soil removal.

Understanding these terms is essential for recognizing how different processes contribute to the overall erosion of soil in various environments.