Question

With reference to micro-irrigation, which of the following statements is/are correct?

1. Fertilizer/nutrient loss can be reduced.

2. It is the only means of irrigation in dryland farming.

3. In some areas of farming, the receding of the groundwater table can be checked.

Select the correct answer using the codes given below:

1. 1 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Answer 1

Correct Answer - Option 3 : 1 and 3 only

The correct answer is 1 and 3 only.

• Micro-irrigation: 
  • In the micro-irrigation technique water is directly applied to the root zone, through drippers, sprinklers, foggers, and other emitters. 
  • Micro-irrigation is a scientific method of irrigation carrying desired water and nutrients directly to the root zone of the plant, drop by drop. The system has an extensive network of pipes operated at low pressure.
  • Dryland farming is defined as the production of crops without irrigation in regions that receive rainfall of less than 500 mm annually. Hence statement 2 is incorrect.
  • Micro-irrigation benefits:
    • Increase in crop yield.
    • Reduces the loss of water.
    • Fertilizer saving.
    • Nutrient leaching can be reduced. Hence, statement 1 is correct.
    • Reduces pest problems
    • Reduces soil erosion 
    • Help in reducing ground water depletion. Hence, statement 3 is correct.