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प्रश्न
Which of the following is not true for fertilisers?
पर्याय
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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संबंधित प्रश्न
Write a paragraph in your own words of the following.
Sowing
______ is called as farmer’s best friend.
Give an example for inorganic fertilizer.
______ is the organic tertillzer.
Fertilizers containing only plant or animal-based materials or those synthesized by microorganisms are called inorganic fertilizers.
Analogy:
Used as fertilizer: Gypsum:: Helps nerves function properly: ______.
Define Biofertilizer.
If you are given a dry piece of land for cultivation, what will you do before sowing the seeds?
