Question

how do the plant use nitrogen from the air?​

Answer 1

Answer:

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Plants cannot themselves obtain their nitrogen from the air but rely mainly on the supply of combined nitrogen in the form of ammonia, or nitrates, resulting from nitrogen fixation by free-living bacteria in the soil or bacteria living symbiotically in nodules on the roots of legumes.

Answer 2

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• Nitrogen is used by plants for lots of leaf growth and good green color.
• The circulation of nitrogen between organisms and the atmosphere is called the nitrogen cycle.
• Some microorganisms reside in the root nodules of leguminous plants and fix nitrogen from the air into the soil, and increase soil fertility.
• Nitrogen is also fixed by lightning to a small extent.