Soil health is increasingly seen as a vital component of sustainable agriculture and food security. This collection of articles covers a broad range of topics, including the contribution of agroecology and conservation agriculture to sustainable agriculture. There is a particular focus on the importance of soil bacteria in climate-smart agriculture. The articles examine the importance of agricultural practices to carbon storage in soil, and the use of techniques such as nanobiochar application. These articles have been published in the journal CABI Reviews.