_:b15951 . _:b15951 . "SulfurExtractableElements"@en . "ISRIC Report 2019/01: Tier 1 and Tier 2 data in the context of the federated Global Soil Information System. Appendix 3"@en . _:b15953 . . . _:b15953 . _:b15952 . _:b15952 . _:b15953 . _:b15952 . _:b15951 . _:b15953 . _:b15951 . _:b15952 .