How can nitrogen be fixed naturally for plant use?

Answer 1

Nitrogen fixation is a process by which nitrogen in the atmosphere is converted into ammonia.

Nitrogen fixation occurs naturally in the soil by nitrogen fixing bacteria.

Some nitrogen fixing bacteria ( Rhizobia ) have a symbiotic relationship with plants.
Non symbiotic nitrogen fixing by bacteria ( Azospirilum ) also occurs in cases like rice roots.
Prokaryotic micro organisms that can fix nitrogen are called diazotrophs.

All biological nitrogen fixation is done by the enzyme nitrogenase which contains a metallic component ( iron ,molybdenum and vanadium ) .

Nitrogen fixation also occurs naturally in the air by means of lightning.

You can watch a video about nitrogen fixation from Britannica here and read more extensively about biological nitrogen fixation here.

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Answer 2

Emma Arvizu

Nitrogen is naturally fixed for plant use through processes like nitrogen fixation by certain bacteria, symbiotic relationships with legumes, and atmospheric deposition.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.