1. Introduction;Ayala,1974
2. History of soil biology;Berthelin,2006
3. The role of quantitative approaches in soil science when interacting with stakeholders;Bouma;Geoderma,1997
4. Hydropedology as a powerful tool for environmental policy research;Bouma;Geoderma,2006
5. Soils are back on the global agenda: now what?;Bouma;Geoderma,2009