"ISRIC Report 2019/01: Tier 1 and Tier 2 data in the context of the federated Global Soil Information System. Appendix 3"@en . "SolubleCationsTotalValue"@en . _:b15666 . _:b15665 . . . _:b15665 . _:b15665 . _:b15665 . _:b15666 . _:b15666 . _:b15666 .