7. Consumptive Use and Irrigation Requirement

Try these first

1. 1.

   Define Consumptive Use (CU).

   Hint

   What happens to water during crop growth?

2. 2.

   What does Irrigation Requirement (IR) mean?

   Hint

   Think about what crops need from irrigation.

3. 3.

   What does Consumptive Use (CU) refer to?

   • A. Water supply system
   • B. Water loss via evaporation and transpiration
   • C. The total amount of rainfall

   Hint

   Think about the water's journey during crop growth.

4. 4.

   True or False: Irrigation Requirement (IR) is always zero.

   • True
   • False

   Hint

   Consider what happens when it does not rain.

5. 5.

   A farmer grows wheat that requires a total CU of 120 cm during the season. If the effective rainfall is only 50 cm, what is the IR?

   Hint

   Remember the relationship between CU and effective rainfall.

6. 6.

   Discuss how using drip irrigation might change a farmer's CU compared to traditional methods.

   Hint

   Think about how water arrives at the plant differently.