Maintenance of soil fertility without addition of nutrition is due to

Floods

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Crop residue

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Favourable temperature

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Microbial activity

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Solution

The correct option is D Microbial activity
Soil fertility is the ability of a soil to sustain agricultural plant growth. It is maintained without addition of nutrition due to microbial activity. Microbes increase the amount of nutrients in soil available for plants. Maintaining soil fertility naturally using microbes can reduce the need for synthetic fertilizers and pesticides.
Thus, the correct answer is 'Microbial activity.'

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Similar questions

An advantage of organic fertilizers over inorganic fertilizers is the addition of __________to the soil.

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