Q11.
What can be the impact of excessive/inappropriate use of nitrogenous fertilizers 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 ground water can occur. Select the correct answer using the codes given below.
Answer
C
Explanation
Nitrogen fixing bacteria converts N2 to Ammonium ion NH4+. With fertilizers already containing NH4 ions, there is no demand or need from plants for the symbiotic association. Further, we can certainly assume that there is no positive correlation between fertilizers and bacterium.