51.5.2.a.iii. Materials

Try these first

1. 1.

   What is surface drainage?

   Hint

   Think about how water is collected and moved away from flat land.

2. 2.

   Name one method of subsurface drainage.

   Hint

   Consider what might be buried underground in agricultural fields.

3. 3.

   What is the primary purpose of surface drainage methods?

   • To store water
   • To remove excess water
   • To increase soil salinity

   Hint

   Consider what happens when it rains heavily.

4. 4.

   True or False: Subsurface drainage methods are only effective in sandy soils.

   • True
   • False

   Hint

   Think about the different kinds of soil used for cultivation.

5. 5.

   You are a farmer with a field experiencing regular waterlogging after rains. Design a comprehensive drainage strategy that incorporates both surface and subsurface methods appropriate for your soil type.

   Hint

   Consider the depth for both types of drainage and how they will work together.

6. 6.

   Evaluate the effectiveness of mole drainage in a region that receives both heavy rains and has poor soil permeability. What would be the limitations?

   Hint

   Think about how mole drains are constructed and their interaction with soil type.