P and K cycles

Fragment of a discussion from Course talk:APBI200

What Sandra was hinting to is the process of ammonium (NH4+) fixation that traps (or fixes) ammonium ion in the inter-layer spacing of certain phyllosilicate minerals. Through that process of ammonium fixation, ammonium ions from soil solution (where they are available to plants) are made unavailable to plants.

MajaKrzic (talk)20:41, 28 April 2020