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?

[UPSC Civil Services Exam – 2018 Prelims]

(a) 1 and 2 only

(b) 3 only

(c) 1 and 3 only

(d) 1, 2 and 3


Answer: (b)

Explanation:

  • The capacity of soil to hold water for crop utilization is known as soil water-holding capacity.
  • Soil texture and organic matter are the major factors that determine this capacity.
  • Sulfur is one of the three crucial nutrients that are circulated between soil, plant matter, and the atmosphere.
  • Although it is predominantly present in sedimentary rocks, it is a vital component of numerous proteins that are necessary for living organisms.
  • Sulphur is released by the erosion of rocks and minerals.
  • The excessive presence of salts in soil is a significant issue for agriculture under irrigation.
  • Long-term irrigation can lead to the accumulation of salts in the soil, causing damage to crops, which is known as soil salinization.

Therefore, option (b) is the correct answer.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

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