Plants require water for their survival. But when watered excessively, plants die. Discuss.

Plants die when watered in excess, because excess water removes the air trapped between the soil particles.

Plants use water for several metabolic processes as photosynthesis, transpiration and respiration.

Plant when watered excess its roots do not get enough oxygen for respiration. Once root cells die, water and mineral absorption is stopped and this leads to gradual death of a plant.

Hence irrigation should be supported with proper drainage of water to avoid water logging in the soil. Water logging draws salt to the surface of the soil. This salt gets deposited on roots of the plants. This increased salt content is dangerous to the growth of the crops and is extremely damages the plants and plants die.