41.2.3. Permanent Wilting Point

Try these first

1. 1.

   What does the Permanent Wilting Point (PWP) indicate?

   Hint

   Think about when plants start showing signs of stress.

2. 2.

   What type of soil retains water more tightly?

   Hint

   Consider surface area and pore size.

3. 3.

   What does the Permanent Wilting Point signify?

   • A. Highest water retention
   • B. Point of plant wilting
   • C. Suitable irrigation level

   Hint

   Remember the effects on plants when moisture levels fall.

4. 4.

   True or False: The smaller the micropores, the easier it is for plants to access water.

   • True
   • False

   Hint

   Reflect on the relationship between pore size and water accessibility.

5. 5.

   Calculate the PWP given a soil sample retains 30% water but is at capacity. What implications does this have for irrigation scheduling?

   Hint

   Consider how much moisture should ideally be present before wilting affects the plants.

6. 6.

   Discuss the potential ecological impacts in a region where agricultural practices neglect the principles of PWP.

   Hint

   Reflect on the balance within an ecosystem when water resources are mismanaged.