Corn is a crop that requires a lot of nitrogen to grow properly. Farmers will often grow corn in a particular field every other year, alternating it with a legume (a member of the pea family) such as soybeans or clover. What is the purpose of this practice?

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Legumes form mycorrhizal associations, which can convert atmospheric nitrogen to a form usable by plants.

  

Legume roots contain bacteria that convert atmospheric nitrogen to a form usable by plants.

  

Legumes are the only plants that can convert atmospheric nitrogen to a form usable by plants.

  

Legumes deplete the soil of nitrogen, so corn is grown to replenish the nitrogen in the soil.

 

asked Dec 31, 2012 in Biology by anonymous
    

1 Answer

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Legume roots contain bacteria that convert atmospheric nitrogen to a form usable by plants.

 

answered Dec 31, 2012 by anonymous

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