What are the physiologically active nitrogen containing compound produce by plants?

There are many compounds containing Nitrogen and Hydrogen like Ammonia, Ammonium Chloride, Ammonium Hydroxide etc.

so that they grows and they manufactured their own food

Organic nitrogen containing compounds have nitrogen directly bonded to a carbon atom. Examples of organic nitrogen containing compounds include amines(-NH2), amides(-CONH2), nitro-group...

Both soil and the ocean contain archaeal microbes, assigned to the Crenarchaeota, that convert ammonia to nitrites. They are more abundant than the nitrifying bacteria and may turn out to play an...

In their body processes.