Some plants cannot take the atmospheric nitrogen directly. They take in nitrogen in usable forms like:
A
Nitrates
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B
Nitrites
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C
Nitrogen dioxide
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D
Nitric acid
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Solution
The correct options are A Nitrates B Nitrites Plants cannot absorb the atmospheric nitrogen directly. They take up the nitrogen in the form of nitrates and nitrites. The atmospheric nitrogen is fixed in the soil by nitrogen fixing bacteria and is converted into nitrates and nitrites by nitrifying bacteria.