In which process is nitrogen from the air put into a form that plants can use?
A B C D
nitrification denitrification nitrogen saturation nitrogen fixation
Question: In which process is nitrogen from the air put into a form that plants can use?
(A) nitrification
(B) denitrification
(C) nitrogen saturation
(D) nitrogen fixation

Answer: (D) nitrogen fixation
Answer: (A) nitrification
Question: In which process is nitrogen from the air put into a form that plants can use?
(A) nitrification
(B) denitrification
(C) nitrogen saturation
(D) nitrogen fixation
Answer: (D) nitrogen fixation