Question

how do plants get nitrogen and how do they use it​

Answer 1

actually plants get nitrogen by rizobium present in there nodules by the process of nitrogen fixation

Answer 2

Plants get Nitrogen via the process of Nitrogen Fixation.

• Nitrogen is an element that is vital for all life forms on the earth. However, nitrogen cannot be used by either plant or animal life in it's atmospheric form N2.

• Atmospheric nitrogen needs to be 'fixed' to other usable forms. In the soil, nitrogen is fixed by certain bacteria to convert it into ammonia which is a combination of nitrogen and hydrogen molecules.

• Groups of bacteria and cyanobacteria use an enzyme called nitrogenase  to convert gaseous nitrogen to ammonium ions or ammonia. This process does not take place in the presence of oxygen and therefore bacteria like Rhizobium, which reside in the oxygen-free nodes of the roots of legumes, perform this task.

• Ammonia in the soil is the usable form which is utilized by the plants through their roots and eventually gets incorporated as plant proteins and nucleic acids.

To know more about Nitrogen Fixation, visit:

https://brainly.in/question/2661219