What is the term used to describe the point at which a plant cannot obtain enough water due to insufficient extraction force?

The term that describes the situation where a plant can no longer extract enough water due to insufficient extraction force is known as the permanent wilting point. This point represents a critical threshold in soil moisture dynamics. When the moisture in the soil reaches this level, the water remaining in the soil is held tightly by the soil particles, making it unavailable for plant uptake. At this stage, even if water is present in the soil, the plant roots lack the necessary force to draw it in, leading to irreversible wilting and potential plant death.

Understanding the permanent wilting point is essential for managing irrigation and ensuring that crops receive adequate moisture during dry periods. It is a key concept in soil science and agronomy, helping growers make informed decisions about when to irrigate based on soil moisture levels.