explain different types of nitrogen fixation process.

Nitrogen fixation is of following types:-

1. Symbiotic nitrogen fixation:- In this type of fixation plant and microbe are in symbiotic association means plant provide the microbe with food source and microbe provide them nitrogen.

2. Associative nitrogen fixation:- In this type of fixation microbe remain attached to the plant roots or leaves, plant provide microbe with food source whereas microbe provide them nitrogen when they die.

3. Free living nitrogen fixation:- In this type of fixation microbes carry out fixation freely without any association.

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