44.5.3. IW/CPE Ratio Method

Try these first

1. 1.

   What does IW stand for in irrigation?

   Hint

   Think about what water is applied to the crops.

2. 2.

   What does CPE represent?

   Hint

   What is the total evaporation measured from a pan called?

3. 3.

   What does IW in irrigation methods refer to?

   • A. Irrigation Water
   • B. Irrigation Width
   • C. Internal Water

   Hint

   Think about the depth of water implications for crops.

4. 4.

   True or False: A higher IW/CPE ratio indicates more efficient water use.

   • True
   • False

   Hint

   Consider what efficiency really means in water usage.

5. 5.

   A farmer in a semi-arid region gets a CPE of 400mm over a season. If his crops need an IW of 200mm, what would the ratio be, and is it sustainable?

   Hint

   Calculate IW/CPE and think about seasonal water needs.

6. 6.

   Discuss how different crops might require different IW/CPE ratios and what factors could influence these decisions.

   Hint

   Consider crop types and local climatic conditions impacting moisture needs.