The correct answer is (4) Nitrogen-fixing bacteria are symbiotically associated with them
Those plant that fixes atmospheric nitrogen to the soil is called leguminous plant.
- For agriculture, legume plants are important, as they are an essential source of protein for human and animal consumption.
- This high protein content results from their ability to use atmospheric nitrogen for their nutrition as a result of their symbiotic interaction with rhizobia.
Examples of leguminous plants are Pea, Soya bean, Clover, Lupine, alfalfa etc.
Check the video given below to know more about the process of farming
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