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प्रश्न
Which of the following is not true for fertilisers?
विकल्प
They increase the yield
Their excessive use disturbs the balance of nutrients in soil
They are generally used in small quantity
They are environment friendly
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उत्तर
They are environment friendly
Explanation:
Fertilisers are not environment friendly as they are chemical substances rich in particular nutrients. Though they increase the crop yield, the repeated and excessive use of fertilisers in the same field reduces the soil fertility. It also pollutes water bodies as they get dissolved and washed away by rain and also seeps into the water table posing threats to humans.
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