Question

what is nitrogen fixation in plants​

Answer 1

Explanation:

some plants have special bacteria called rhizobium in their root nodules which help the plant to trap atmospheric nitrogen and convert in fertilizer

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Answer 2

They contain symbiotic bacteria called rhizobia within nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants; this helps to fertilize the soil.