Mulching can improve soil structure by:

• A. Raises soil pH dramatically
• B. Increases soil salinity
• C. Improves soil structure
• D. Depletes soil organic matter

Answer: (C)

Mulching improves soil structure by adding and sustaining organic matter in the topsoil. As mulch breaks down, it feeds soil organisms and increases stable organic material that helps particles stick together into aggregates. These aggregates create better pore spaces, boosting aeration and drainage, while reducing surface crusting and erosion. The result is a looser, more crumbly soil that holds moisture and supports healthier root growth. Mulching doesn’t dramatically raise soil pH, and it doesn’t increase salinity; it also adds organic matter rather than depleting it, so the option describing improved structure best fits.