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    Ammonium availability in the Late Archaean nitrogen cycle

    The bioavailability of essential nutrients such as nitrogen and phosphorus has fluctuated with the chemical evolution of Earth surface environments over geological timescales. However, significant uncertainty ...

    J. Yang, C. K. Junium, N. V. Grassineau, E. G. Nisbet, G. Izon in Nature Geoscience (2019)