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UPSC 2018: With reference to agricultural soils, consider the following statements : 1. A high content of organic matter in soil drastically reduces its water holding capacity. 2. Soil does not play any role in the sulphur cycle. 3. Irrigation over a period of time can contribute to the salinization of some agricultural lands. Which of the statements given above is/are correct ?
(a)1 and 2 only
(b)3 only
(c)1 and 3 only
(d)1, 2 and 3
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Not attemptedCorrect Answer: (b) 3 only
Organic matter acts like a sponge and actually increases a soil’s water-holding capacity, so statement 1 is wrong. Soil microorganisms drive key steps of the sulphur cycle, so statement 2 is wrong. Long-term irrigation can lead to salt accumulation on the surface, making statement 3 correct; therefore only statement 3 is right. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-2018-question-82/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2018 Geography question?▼
The correct answer is option (b): 3 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physical Geography & Geomorphology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2018, GS Paper 1, as Question 82. It falls under Geography > Physical Geography & Geomorphology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Physical Geography & Geomorphology?▼
UPSC has asked 25 questions from Physical Geography & Geomorphology (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.