Multiple choice

Nitrogen needed by the plants is taken up in the form of _______.

  1. nitrates

  2. nitrogen gas

  3. ammonia

  4. nitrous oxides

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Although nitrogen is abundant in the atmosphere, plants cannot absorb it directly as gas. They absorb nitrogen primarily in the form of nitrates or ammonium ions from the soil.