42.10. Irrigation Scheduling Based on Root Zone Water Balance

Try these first

1. 1.

   What does the water balance equation represent?

   Hint

   Think about how we measure water coming in and going out.

2. 2.

   Define Available Water (AW).

   Hint

   Consider what water plants can actually use.

3. 3.

   What does 'I' stand for in the water balance equation?

   • Irrigation
   • Infiltration
   • Intake

   Hint

   Think about the water we give to crops.

4. 4.

   True or False: Surface runoff is beneficial for irrigation.

   • True
   • False

   Hint

   Consider where the water goes when it runs off the surface.

5. 5.

   A farmer calculates that he has the following values: P = 40 mm, I = 15 mm, ET = 20 mm, D = 3 mm, and R = 5 mm. How much water remains in the soil after these calculations?

   Hint

   Follow the water balance equation step by step.

6. 6.

   Analyze how a prolonged dry season would affect the water balance and what a farmer should consider when scheduling irrigation.

   Hint

   Think about balancing inputs and managing water resources efficiently.