What are the advantages of fertigation in agriculture ?
- 1.Controlling the alkalinity of irrigation water is possible.
- 2.Efficient application of Rock Phosphate and all other phosphatic fertilizers is possible.
- 3.Increased availability of nutrients to plants is possible.
- 4.Reduction in the leaching of chemical nutrients is possible.
Select the correct answer using the code given below :
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Answer: C. Fertigation means giving fertiliser through drip or sprinkler irrigation water. It allows acids to be added to control alkalinity, makes nutrients more available, and cuts leaching. Rock phosphate is insoluble, so it cannot be applied this way. So 1, 3 and 4.
Watch for: 'All phosphatic fertilisers' is too broad; only water-soluble ones work.
Why the other options are wrong
- A. Wrong because rock phosphate is insoluble and cannot be used in fertigation.
- B. Wrong because rock phosphate cannot be used, and nutrient availability is improved.
- D. Wrong because rock phosphate cannot be applied by fertigation.
Source to check: ICAR / TNAU Agritech Portal on fertigation (agritech.tnau.ac.in)
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.