Question

1.Why does left over roots and other plant parts are deliberately

dumped in farm soil after har vesting a leguminous crop?

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Answer 1

Answer:

After continuous plantation of the crops like rice and wheat, the nitrogen level of the soil decreases. ... Hence increasing the nitrogen level of soils. So the farmers plant the leguminous plants to maintain the nitrogen level of the soil.

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Answer 2

Answer:

These wastes are biodegradable. So it will degrade in the soil and thus it increases the soil fertility.