Why should broad bean seeds be soaked in water before planting?

Is to let dry seeds absorb enough water, and then give them temperature and air. It will germinate if conditions permit, and it will germinate if it is kept moist and supplied with water without soaking in advance, but it usually takes a long time to germinate!

Soak in warm water of 50 ~ 55℃, stir while soaking until the water temperature tends to normal temperature, then soak for about 12 hours, take out, rinse with clean water, wrap with gauze, and accelerate germination. Pay attention to keep the gauze moist and not dry!

The seeds can be sown when they crack and expose about one third!