44.2.2. Equation for IR

Try these first

1. 1.

   Define Irrigation Requirement (IR).

   Hint

   Think about how IR relates to crop needs.

2. 2.

   What does CWR stand for?

   Hint

   It’s the total water needed for crops.

3. 3.

   What does IR stand for?

   • Irrigation Requirement
   • Irrigation Rate
   • Irrigation Resource

   Hint

   Think about the overall goal of irrigation.

4. 4.

   True or False: Effective rainfall reduces the irrigation required.

   • True
   • False

   Hint

   Consider how rainfall helps in growing crops.

5. 5.

   A botanical garden measures its CWR at 180 mm. Effective Rainfall is 60 mm, Groundwater contribution is 30 mm, and soil water available is 20 mm. Calculate the IR required and discuss how varying conditions might affect this requirement.

   Hint

   Use the IR equation methodically.

6. 6.

   Analyze how an anticipated drought might change irrigation practices based on the IR equation. If CWR is fixed, what adjustments would farmers need to make in their water sourcing?

   Hint

   Think about water conservation strategies and management plans.