Dr. Sally Brown
Organic residuals, soil health and
Organic residuals, such as biosolids and compost from food waste, have the potential to improve soil fertility and a number of other soil properties important for plant growth. Organic residuals and soils can also play a role in climate change: The different end-use options available for organic residuals can carry very different total life-cycle greenhouse gas emissions, and soils can be important sources and sinks of greenhouse gases when applied with residuals. Soils applied with residuals may also tend to store more carbon, making them an important tool in mitigating human-driven climate change. We have conducted research into the carbon storage potential of soils applied with organic residuals (including biosolids), and have also begun work on establishing the strength of nitrous oxide (N2O) emissions from organically amended soils.