The Wilting Coefficient and Its Relation to Soil Water Content and Potential
A primary function of soil in natural environments is to store water from rain and irrigation, and to make the stored water available to plant roots for uptake and transpiration. Not all of the water stored in the soil, however, is available to the plants. In some clay soils, half the pore space may be filled with water unavailable to plants. For water budget analyses and irrigation management, it is important to know how much water the soil can store.
Plant water requirement study.
In 1912 L. J. Briggs and H. L. Shantz published an amazingly complete study of the water requirements
