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Understanding the Impacts of Clay Mineralogy on Soil Specific Surface Area: Organic Carbon as a Key Factor

Fabien Hubert

Soil specific surface area (SSA) is a critical property that affects numerous soil functions and processes. Clay mineralogy, characterized by the types and arrangement of clay minerals, has long been recognized as a key factor influencing soil SSA. However, the role of organic carbon in modulating soil SSA and its interactions with clay minerals have gained increasing attention. This article explores the impacts of clay mineralogy on soil SSA and unravels the intricate role of organic carbon in this context. It highlights how different clay mineral compositions, such as type clays versus type clays affect the overall SSA of soils. Furthermore, it delves into the ways in which organic carbon interacts with clay minerals, modifying their behavior and influencing soil aggregation, thereby affecting soil SSA. Understanding these complex interactions is essential for improving soil management strategies, optimizing agricultural practices, and ensuring sustainable land use. Further research is warranted to explore the synergies between clay mineralogy and organic carbon and to develop predictive models for estimating soil SSA based on these factors. This knowledge will contribute to effective soil conservation and the enhancement of soil fertility and nutrient availability.