In what ways can nitrogen gas be broken down into nutrients for plants

it can be done by oxidation and reduction.

Some nitrogen fixing bacterias are also responsible for converting atmospheric nitrogen into nitrates that plants can use (e.g ribozhium )

bacterias in the soil participate in nitrification as well, oxidizing ammonium ions into nitrates which plants can use.

Explanation:

Oxidation produces nitrate compounds

reduction produces ammoniacal compounds.

nucleus

would be most reasonable answer tbh