Which practice specifically improves soil structure and root growth by reducing compaction?

• A. Overseeding
• B. Topdressing
• C. Aeration
• D. Soil fumigation

Answer: (C)

Relieving soil compaction to improve air, water movement, and root penetration is what this question targets. When soil is compacted, pore spaces shrink, limiting oxygen, slowing water infiltration, and restricting how deep roots can grow. Aeration fixes this by creating holes in the soil and, in core aeration, removing plugs. Those openings reduce local soil density and boost pore space, allowing air, water, and roots to move more freely. With better aeration, roots can spread deeper, access nutrients more efficiently, and turf becomes more resilient to traffic and drought stress.

Overseeding focuses on adding more grass plants rather than altering soil structure, so it doesn’t directly address compaction. Topdressing adds material to the surface and can improve surface leveling and long-term soil quality, but its immediate impact on deep compaction is limited. Soil fumigation targets pests or pathogens and disrupts soil biology; it does not enhance physical soil structure or root growth.