In which form(s) can plants generally absorb nitrogen and make use of it?

Question

Quizplus · Accepted Answer

Plants can absorb nitrogen primarily in the form of nitrate (NO3-) and ammonium ion (NH4+). These are the two main forms of nitrogen that plants can directly utilize for their growth and development. Nitrogen in the form of N2 gas requires fixation by bacteria before it can be used by plants, and it is not directly absorbed from the soil in this form.

In Which Form(s) Can Plants Generally Absorb Nitrogen and Make