What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture?
(1) Proliferation of nitrogen-fixing microorganisms is soil can occur.
(2) Increase in the acidity of soil can take palce.
(3) Leaching of nitrate to the ground-water can occur.
Select the correct answer using the code given below.
Answer:
(c)
Core Books/NCERT
Statement 1 is absurd. Increasing the amount of nitrogen based fertilizer does not lead to more micro-organisms in the field. If it did, just one dose of fertilizer would make a farm nitrogen rich for years together. Statement 2: Excessive use of nitrogen fertilizers resulting in soil acidity is a well-known fact. Statement 3: Nitorgen fertilizers break down into nitrates and travel easily through the soil. Because it is water-soluble and can remain in groundwater for decades, the addition of more nitrogen over the years has an accumulative effect.Tikdam: Statement 1 is absurd, it it were true, there would be no need of fertilizer any more. Soil bacterai will fix the nitrigen perpetualy Leaching of urea- formation of nitric acid, even 3rd statement points that out