Which of the following practices can help in water conservation in agriculture?

  1. Reduced or zero tillage of the land
  2. Applying gypsum before irrigating the field
  3. Allowing crop residue to remain in the field

Select the correct answer using the code given below.

[UPSC Civil Services Exam – 2017 Prelims]

(a) 1 and 2 only

(b) 3 only

(c) 1 and 3 only

(d) 1, 2 and 3


Answer: (c)

Explanation:

  • To minimize water stress and improve water resources, various methods can be employed.
  • One such method is using surface residue covers to increase infiltration and reduce runoff, as this reduces the ability of rainwater to disintegrate soil aggregates and detach fine particles.
  • Another effective method is using impermeable and permeable contour barriers at discrete intervals downslope, combined with reduced or zero tillage. These methods help in conservation agriculture.
  • Additionally, incorporating lime without or with gypsum can reduce toxic concentrations of aluminium and/or manganese, enabling deeper rooting, increasing productivity, and aiding in water conservation.
  • However, according to the official UPSC answer key, only statements 1 and 3 are correct, implying that statement 2 is incorrect.

Therefore, option (c) 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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