• yesman@lemmy.world
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    18 hours ago

    The air is full of nitrogen with trace amounts of carbon. The soil is rich in carbon but nitrogen poor. Plants draw carbon from the air and nitrogen from the soil.

      • FoxyFerengi@lemm.ee
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        16 hours ago

        Nitrogen as a gas (N2) has a triple bond to another nitrogen. Those are the hardest bonds to break. CO2 has strong double bonds to oxygen, but those are easier to break. Bacteria and fungi are able to split nitrogen and supply it to plant roots in exchange for carbon (sugars) in symbiotic relationships.

        Side note, but we’re starting to see the exchange rates of nitrogen and carbon shift, because plants are now absorbing/exchanging so much carbon from the air