The form of nitrogen most usable to plants is
A) Ammonia
B) nitrogen gas
C) Proteins
D) Nitrates
E) Methane

Question

Quizplus · Accepted Answer

Nitrates (NO3-) are the most commonly utilized form of nitrogen by plants. Nitrogen gas (N2) makes up 78% of the atmosphere but cannot be used by plants until it is converted into other forms. Ammonia (NH3) can also be utilized by some plants, but nitrates are preferred. Proteins and methane are not forms of nitrogen that can be directly taken up by plants.

The Form of Nitrogen Most Usable to Plants Is