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# From lab to field  Although numerous experiments clearly show that (mycorrhizal) fungi do have an impact on mineral dissolution (see previous section), the significance of fungal weathering on soil and global scale weathering rates remains controversial. This ongoing controversy is caused by both the challenge to quantify the fungal contribution in the field, and a series of persisting misconceptions. Modelling is a useful tool to test the scope of fungal weathering concepts. In this section we will review the available field data and modelling work on mycorrhizal weathering, and discuss the most persistent misconceptions in this research field.      Due to the slow kinetics of soil mineral weathering, and the complex soil matrix, a direct estimation of the contribution of mycorrhizal fungi on the weathering process is challenging.