The capillary action can be defined as the process in which liquid flows up or falls down into narrow spaces without the help of any external forces.
When gravitational water drains out, there is still some water left in the soil, which is subjected to capillary action. This water is known as capillary water.
Significance of Capillary Water:
The capillary water in narrow soil spaces forms a film around it. It is important as it holds the soil particle together, not letting the soil disperse to gravity.
Capillary action helps people to drink through straws, as water moves up in straws against gravity by capillary action.
In towels, there are small pores in which the water moves; thus, it helps absorb water and quick drying.