Question

Which of the following is not true for fertilisers?

• A. They are environment friendly.
• B. They are generally used in small quantity.
• C. They increase the yield.
• D. Their excessive use disturbs the balance of nutrients in soil.

Answer 1

The correct option is A They are environment friendly.

• Fertilisers are inorganic salts made in factories and are rich in nitrogen, phosphorus and potassium.
• They are used in very small quantity and enhances the fertility of the soil. Thereby increasing the crop yield.
• Fertilisers are not environment friendly as they are chemical substances rich in particular nutrient.
• Although they increase the crop yield, but their excessive use reduces the soil fertility, as it kills the microorganisms present in the soil.
• Sometimes they are washed away by rain into the water bodies and also seeps in the water table posing threats to life.