Question

Excess of nitrogenous fertilizers are harmful because they__________.

• A. Increase the acidity of the soil.
• B. do not get distributed uniformly in the soil.
• C. get leached away from the soil easily and pollute the water bodies.
• D. produce extra heat which burns plants.

Answer 1

Answer: (C)

get leached away from the soil easily and pollute the water bodies.

Nitrogenous fertilizers leach away from the soil easily due to their high solubility in water and pollute the water bodies. Nitrogen leaching is a naturally occurring process, it occurs when nitrogen leaves the soil in drainage water. Nitrate is soluble and mobile. It is no problem when it is within the root-zone, but once it gets into the groundwater and other freshwater bodies it is an environmental pollutant.

Hence, the correct option is $\left(C\right)$.