Which of the following is/are the advantage/advantages of practising drip irrigation?
- 1.Reduction in weed
- 2.Reduction in soil salinity
- 3.Reduction in soil erosion
Select the correct answer using the code given below.
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Answer: C. Item 1 is correct: drip irrigation wets only the plant root area, so fewer weeds grow. Item 3 is correct: slow, small amounts of water do not wash away soil. Item 2 is treated as wrong in the key: drip does not reduce soil salinity in general and can leave salts at the edge of the wetted zone. So 1 and 3.
Watch for: Students think any water-saving method also fixes salinity.
Why the other options are wrong
- A. Wrong because drip irrigation is not generally a way to reduce soil salinity.
- B. Wrong because reduced weeds is also an advantage.
- D. Wrong because reduced weeds and erosion are clear advantages.
Source to check: ICAR and Ministry of Agriculture, Pradhan Mantri Krishi Sinchayee Yojana micro-irrigation guidelines; NCERT Class 9 Science, Chapter 'Improvement in Food Resources' (irrigation)
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.