Which Forms of Nitrogen are Readily Usable by Plants

Question

Which forms of nitrogen are readily usable by plants? A) NH4⁺ and NO2^- B) NO3^- and NO4^- C) NH4⁺ and NO3^- D) N2and NH3

Accepted Answer

Plants readily use nitrogen in the forms of ammonium (NH₄⁺) and nitrate (NO₃⁻).