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Human activity redistributes nitrogen fixation across the terrestrial biosphere
Nature, Published online: 16 July 2025; doi:10.1038/d41586-025-02209-2Detailed spatial estimates from a global analysis of biological nitrogen fixation on land reveal that natural environments sustain much less nitrogen fixation than was thought. But agricultural cultivation of nitrogen-fixing crops and forage drastically increases local nitrogen inputs, so that total agricultural nitrogen fixation nearly equals that of all natural lands combined.
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