Question

how is nitrogen replaced naturally in soil?​

Answer 1

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✰Adding manure like cow dung, decayed leaves etc. By sowing leguminous crops like peas. These leguminous plants contains nitrogen-fixing bacteria in their roots that help them to fix atmospheric nitrogen and thus enrich the soil.

Answer 2

Organic

Adding composted manure to the soil.

Planting a green manure crop, such as borage.

Planting nitrogen fixing plants like peas or beans.