Soil-Water-Plant Relationship

The permanent wilting point of agricultural soils is conventionally defined at a soil matric potential of:

Options:

• (A) $-15\text{ bar}$ ($-1.5\text{ MPa}$)
• (B) $-0.33\text{ bar}$ ($-33\text{ kPa}$)
• (C) $-0.10\text{ bar}$ ($-10\text{ kPa}$)
• (D) $-31\text{ bar}$