Soil-Water-Plant Relationship

The soil moisture tension corresponding to the Permanent Wilting Point (PWP) of most agricultural crops is approximately:

Options:

• (A) $-1.5\text{ MPa}$ ($-15\text{ bars}$)
• (B) $-0.033\text{ MPa}$ ($-1/3\text{ bar}$)
• (C) $-0.01\text{ MPa}$ ($-0.1\text{ bar}$)
• (D) $-3.1\text{ MPa}$ ($-31\text{ bars}$)