7.1. Necessity

Try these first

1. 1.

   What is water logging?

   Hint

   Think of how too much water affects plant roots.

2. 2.

   List one method of drainage.

   Hint

   Consider what collects water on the surface.

3. 3.

   What is a major effect of water logging on crops?

   • Promotes healthy growth
   • Reduces root respiration
   • Increases nutrient intake

   Hint

   Think about what happens when roots are submerged.

4. 4.

   True or False: Subsurface drainage methods are suitable for all soil types.

   • True
   • False

   Hint

   Consider the conditions where water needs to be drained.

5. 5.

   You are tasked with designing a drainage plan for a rice paddy in a region with seasonal heavy rains. Describe your approach.

   Hint

   Consider how seasonal rains affect water levels.

6. 6.

   Analyze the impact of poor soil drainage on crop yields over a five-year period.

   Hint

   Think about long-term effects on soil and plants.