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  • John Kempf

    January 30, 2021 at 6:58 am

    There is documentation, root exudate pH can vary quite a bit, depending on whether it is absorbing nitrate or ammonium. Absorbing ammonium will acidify exudates, absorbing nitrate will produce less acidic exudates.

    It is my understanding the Haney H3A extraction is not a neutral solution, but mildly acidic and not highly buffered to be similar to root exudates.