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Question

Yield from Raghu's farm land was reducing year by year. He consulted an agriculture officer who had suggested him to use an organic substance X to increase yield and also retain the fertility of soil. Identify X.

A
Manure
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B
Ammonia
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C
Superphosphate
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D
Ammonium sulphate
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Solution

The correct option is A Manure
Manures are organic substances formed by the decomposition of animal excreta and plant wastes. They provide nutrition to plants. They are natural and contain no chemicals. Thus, they do not decrease the fertility of the soil. Meanwhile, ammonia, superphosphate and ammonium sulphate are the constituents of chemical fertilisers. Excessive usage of these fertilisers can damage the soil in many ways, and can lead to soil infertility.

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