How Soil Salinity Increases Biochar Carbon Stability

A new study indicates that high soil salinity slows the aging process of biochar, allowing it to retain carbon for longer periods. This happens because salt inhibits the fungi and microbes that typically break down organic matter, while mineral deposits create a physical barrier against oxidation. These findings have implications for carbon sequestration projects on saline farmland. Understanding how different soil chemistries affect the longevity of biochar helps land managers better predict carbon permanence and the long term effectiveness of soil amendments.