To Be Useful to Plants Soil Nitrogen Must Usually Occur

Question

To be useful to plants soil nitrogen must usually occur as: A) N2and NH3 B) NH3and NO3^- C) NO3^- and N2 D) N2and NO2 E) NO2and NO3^-

Accepted Answer

Nitrogen is most useful to plants in the form of ammonium (NH4+) and nitrate (NO3-), which are the forms plants can directly assimilate through their root systems.