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Modeling is a powerful tool to integrate different processes in one theoretical framework.  Key is to identify the most important processes explaining mineral dissolution rates.  As important as the selection of processes is the factor scale. Soils are extremely heterogeneous environments, and most processes act on the micrometer to millimeter scale.  Due to the limitation of computational power, simulation models are restricted in their spatial scale. scale. How these small scale mechanisms are upscaled can have major consequences on the model behaviour at soil level.  The most well-known model, PROFILE \cite{Sverdrup_1993} is based on a series of chemical dissolution reactions simulated at the scale of soil layer 'bulk' soil solution. The parameterization is basedon extensive