@article{Sumner2017, author = "Malcolm Sumner", title = "{Global soil degradation in relation to sustained productivity}", year = "2017", month = "10", url = "https://adelaide.figshare.com/articles/presentation/Global_soil_degradation_in_relation_to_sustained_productivity/5536708", doi = "10.4225/55/59f2aa4b0135e" }