Question

what is different sources of nitrites and nitrates in the soil? why do plants need them? i need easy and understandable answer

Answer 1

First, amonia convert to nitrites and nitrites convert to nitrates than plant absorb nitrat because plant used to protein synthesis

Answer 2

Plant belonging to pea family have nitrogen fixing bacteria in their root nodule to fix the dinitrogen gas in the soil into nitrogen compounds which were nitrites and nitrates. Plants need them because it increases soil fertility
hope it's right