How does a green plant get the nitrogen from the soil?

Green plants absorb nitrogen from the soil primarily in the form of nitrate (NO3-) or ammonium (NH4+). These forms of nitrogen are taken up through the plant's root system. Once inside the plant, nitrogen is utilized to synthesize essential compounds such as amino acids, proteins, and nucleic acids, which are vital for growth and development. Additionally, some plants form symbiotic relationships with nitrogen-fixing bacteria, which can convert atmospheric nitrogen into a usable form for the plant.