Which of the following adds/add nitrogen to the soil?

1. Excretion of urea by animals
2. Burning of coal by man
3. Death of vegetation

Select the correct answer using the codes given below:

Question

Which of the following adds/add nitrogen to the soil? 1. Excretion of urea by animals 2. Burning of coal by man 3. Death of vegetation Select the correct answer using the codes given below:

Quintessence Classes · Accepted Answer

The correct answer is 1 and 3 only. The correct answer is 1 and 3 only.1. Excretion of urea (Yes): Animal waste contains nitrogenous compounds. Soil bacteria convert this urea into ammonia and nitrates, enriching the soil.2. Burning of coal (No): This releases nitrogen oxides into the atmosphere. It is a source of air pollution, not a direct method of soil fertilization.3. Death of vegetation (Yes): When plants die, decomposers break down their organic matter, returning the nitrogen stored in their tissues back into the soil.

Answer

1 only

Answer

2 and 3 only

Answer

1, 2 and 3

Which of the following adds/add nitrogen to the soil?

1. Excretion of urea by animals
2. Burning of coal by man
3. Death of vegetation

Select the correct answer using the codes given below:

Answer & Explanation

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UPSC CSE 2013 Prelims

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