The subsoil contains a high concentration of minerals.

Farmers often subsoil their fields to improve drainage and soil quality.

The subsoils of the region are rich in minerals.

The farmer used a subsoiler to break up the compacted soil.

Farmers use subsoilers to break up compacted soil.

Subsoiling is an important agricultural practice for ploughing to the depth of the subsoil.

Farmers use subsoilings to improve soil drainage.

The farmer subsoiled the field to improve drainage.