| What can be the impact of excessive/inappropriate use of nitrogenous fertilisers in agriculture? |
| 1. Proliferation of nitrogen-fixing microorganisms in soil can occur. |
| 2. Increase in the acidity of soil can take place. |
| 3. Leaching of nitrate to the groundwater can occur. |
| Select the correct answer using the codes given below. |
A) 1 and 3
B) Only 2
C) 2 and 3
D) All of these
Correct Answer: C
Solution :
Exp. [c] The impacts of excessive use of nitrogenous fertilisers in agriculture are as follow ? Continuous use of nitrogen fertilisers causes decrease in soil pH i.e. increases acidity. ? When it is too much applied, it causes air pollution by nitrogen oxides emissions. ? Nitrogen in agricultural areas reach the water environment by three ways: drainage, leaching and flow. ? Nitrate leaching is particularly linked to agricultural practices such as fertilising and cultivation. ? Proliferation of nitrogen-fixing microorganisms in soil enhance the availability of nutrients i.e. nitrogen. Hence, option [c] is correct.
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