_:b15994 . _:b15992 . . _:b15993 . _:b15994 . _:b15993 . "PH"@en . _:b15992 . _:b15994 . "ISRIC Report 2019/01: Tier 1 and Tier 2 data in the context of the federated Global Soil Information System. Appendix 3"@en . _:b15993 . _:b15994 . _:b15992 . _:b15992 . . _:b15993 .