Consider the following statements: 1. Agricultural soils release ni

Consider the following statements:

  • 1. Agricultural soils release nitrogen oxides into environment.
  • 2. Cattle release ammonia into environment.
  • 3. Poultry industry releases reactive nitrogen compounds into environment.

Which of the statements given above is/are correct?

1 only
2 and 3 only
4 only
1, 2 and 3
This question was previously asked in
UPSC IAS – 2019
The correct answer is D) 1, 2 and 3.
This question assesses the understanding of sources of atmospheric nitrogen compounds.
1. Agricultural soils release nitrogen oxides into environment: Correct. Nitrous oxide (N₂O), a significant greenhouse gas, is released from agricultural soils through microbial processes (nitrification and denitrification), especially when nitrogen fertilizers are used. Other nitrogen oxides (like NO and NO₂) can also be released, though N₂O is the most significant from soil.
2. Cattle release ammonia into environment: Correct. Livestock, particularly cattle, excrete significant amounts of nitrogen in urine and feces. This nitrogen is converted to ammonia (NH₃) through microbial processes in manure and released into the atmosphere.
3. Poultry industry releases reactive nitrogen compounds into environment: Correct. Similar to cattle, poultry operations generate large amounts of nitrogen-rich manure, which leads to the release of ammonia and other reactive nitrogen compounds into the atmosphere. Poultry litter management is a major source of atmospheric ammonia.
All three statements describe significant anthropogenic sources of nitrogen compounds that impact the environment, contributing to air pollution, acid rain, eutrophication, and climate change (in the case of N₂O). Therefore, all three statements are correct. The options provided seem to have a typo with “4 only”; assuming option D represents “1, 2 and 3”, that is the correct choice.