Question

Corn is a crop that requires a lot of nitrogen to grow properly. Farmers will often grow corn in a particular field every year, alternating it with a legume. What is the purpose of this –

• A. Legumes form mycorrhizal association which can convert atmospheric N₂ into a form usable by plants
• B. Legume roots contain bacteria that convert atmospheric nitrogen into a form usable by plants
• C. Legume are the only plants that can convert atmospheric nitrogen into a form usable by plants
• D. Legumes deplete the soil of nitrogen, so corn is grown to replenish the nitrogen in the soil

Answer 1

Answer: (C)

Legume are the only plants that can convert atmospheric nitrogen into a form usable by plants