In this chapter, the results from many years of research on silicon in soils and plants were consolidated, and the analysis included the chemical dynamics of the different forms of silicon in soils, specifically the form used by plants, monosilicic acid (H4SiO4), the assimilation and the role of silicon in plants, the critical levels of silicon in soils and plants, the procedures to estimate the plant-available silicon in soils, and the potential sources of silicon.
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