Question
How does Nitrogen get to the soil? From sunlight From broken pieces of rock It falls to the ground with precipitation (rain, snow sleet, etc..)
Solution
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XaviMaster · Tutor for 5 years
Answer
The correct answer is: **It falls to the ground with precipitation (rain, snow, sleet, etc.).**<br /><br />Nitrogen gas (N₂) makes up about 78% of the Earth's atmosphere. However, plants can't use nitrogen in its gaseous form. It needs to be "fixed" or converted into other nitrogen-containing compounds like nitrates and ammonia. Some of this nitrogen fixation happens in the atmosphere during lightning storms and then falls to the earth dissolved in precipitation. Other nitrogen fixation happens in the soil by specialized bacteria.<br />
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