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UPSC Prelims 2020 Paper-1 📅 04 Oct, 2020

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:

A
1, 2 and 3 only
B
1, 2 and 4 only
C
1, 3 and 4 only
D
2, 3 and 4 only
Result Summary
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UPSC Prelims
2020 • 04 Oct, 2020 • Paper-1
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:
Correct Answer
1, 3 and 4 only
Concept of Fertigation: Fertigation is the highly precise application of liquid fertilizers directly through a micro-irrigation system (like drip irrigation) st......
Ref/Book : UPSC Prelims 2020
Ref. Subject Economy
Chapter -
Ref. Topic Agriculture
Pg. No -
💡 Analysis & Explanation
Concept of Fertigation ▼
Fertigation is the highly precise application of liquid fertilizers directly through a micro-irrigation system (like drip irrigation) straight to the root zone of the crop.
Alkalinity and Efficiency ▼
Farmers can easily inject precise doses of acids along with the water to neutralize excessive alkalinity, improving soil pH. (Statement 1 is correct). Because the fertilizer is delivered directly to the active roots in soluble form, nutrient absorption increases dramatically (Statement 3 is correct), and wasteful leaching into the deep groundwater is severely minimized (Statement 4 is correct).
The Phosphatic Limitation ▼
The critical constraint of fertigation is that it strictly requires fully water-soluble fertilizers. Rock Phosphate is a raw mineral that is highly insoluble in water. Forcing it into a fertigation system would fail to dissolve and would hopelessly clog the delicate emitters and micro-tubes. Statement 2 is technologically false.
Conclusion ▼
Leaving out the impossible application of insoluble Rock Phosphate, options 1, 3, and 4 identify the genuine advantages.
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