The article "Mineral control of soil organic carbon storage and turnover" by Margaret S. Torn, Susan E. Trumbore, Oliver A. Chadwick, Peter M. Vitousek, and David M. Hendricks explores the interactions between soil mineralogy and soil organic carbon in volcanic soil environments. The study uses radiocarbon analyses to investigate how spatial and temporal variations in soil mineralogy influence the quantity and turnover of long-residence-time organic carbon. Over a 150,000-year period, the soil developed from volcanic ash, with non-crystalline minerals initially abundant and crystalline minerals accumulating over time. Soil organic carbon content followed a similar trend, peaking after 150,000 years and then decreasing by 50% over the next four million years. A positive relationship between non-crystalline minerals and organic carbon was observed, indicating that changes in millennial-scale cycling of mineral-stabilized carbon, rather than changes in fast-cycling organic matter or net primary productivity, drove the accumulation and subsequent loss of organic matter. The study suggests that soil mineralogy plays a crucial role in determining the quantity of organic carbon stored in soil, its turnover time, and atmosphere-ecosystem carbon fluxes during long-term soil development, which is relevant to other humid environments.The article "Mineral control of soil organic carbon storage and turnover" by Margaret S. Torn, Susan E. Trumbore, Oliver A. Chadwick, Peter M. Vitousek, and David M. Hendricks explores the interactions between soil mineralogy and soil organic carbon in volcanic soil environments. The study uses radiocarbon analyses to investigate how spatial and temporal variations in soil mineralogy influence the quantity and turnover of long-residence-time organic carbon. Over a 150,000-year period, the soil developed from volcanic ash, with non-crystalline minerals initially abundant and crystalline minerals accumulating over time. Soil organic carbon content followed a similar trend, peaking after 150,000 years and then decreasing by 50% over the next four million years. A positive relationship between non-crystalline minerals and organic carbon was observed, indicating that changes in millennial-scale cycling of mineral-stabilized carbon, rather than changes in fast-cycling organic matter or net primary productivity, drove the accumulation and subsequent loss of organic matter. The study suggests that soil mineralogy plays a crucial role in determining the quantity of organic carbon stored in soil, its turnover time, and atmosphere-ecosystem carbon fluxes during long-term soil development, which is relevant to other humid environments.