potassium release from muscovite and phlogopite as influenced by selected organic acids

abstract low molecular weight carboxylic acids (lmw) play an important role in improving the bioavailability of soil nutrients. nonexchangeable soil k, trapped between the interlayers of clay minerals, is an important source of k for plants in many soils. the objectives of this study were to determine the effect of selected lmw organic acids on the release of k from micaceous minerals and to investigate the resulting mineralogical changes. a laboratory dissolution study was carried out using a completely randomized design with three replicates. muscovite and phlogopite ( muscovite. the kinetics of non-exchangeable k release from minerals consisted of two phases, the first phase was relatively rapid and then it had a constant rate untile the end of experiment. strongly coordinating lmw carboxylic acids enhance the mineral dissolution and weathering reactions through the detachment of surface complexes into solution. there was not any xrd detectable changes in minerals reacted with organic acids up to 4 months.