Subsurface compaction from tillage usually starts at what depth?

Subsurface compaction from tillage typically begins slightly below the depth of tillage because the mechanical forces applied during tillage can compress the soil layers situated just below where the tillage implements reach. When tillage is performed, it disturbs the upper layers of soil, but as the equipment passes over the soil, it exerts pressure that can compact the layers just beneath the tilled zone.

This compression creates a denser layer which can hinder root growth and water infiltration. The extent and severity of this compaction often depend on factors such as soil texture, moisture content, and the type of tillage equipment used. Understanding this depth is crucial for effective soil management and ensuring optimal crop growth, as it helps identify the likely zones of compaction that could affect crop performance.