Question

Three ways in which plants obtain nitrogen​

Answer 1

Plants cannot themselves obtain their nitrogen from the air but rely mainly on the supply of combined nitrogen in the form of ammonia, or nitrates, resulting from nitrogen fixation by free-living bacteria in the soil or bacteria living symbiotically in nodules on the roots of legumes.

Answer 2

Explanation:

Plants obtain nitrogen through a natural process. Nitrogen is introduced to the soil by fertilizers or animal and plant residues. Bacteria in the soil convert the nitrogen to ammonium and nitrate, which is taken up by the plants by a process of nitrogen fixation. In order to make amino acids, proteins and DNA plants need nitrogen. The nitrogen which is present in the atmosphere is not that kind which plants can use.