"CopperExtractableElements"@en . _:b10690 . "ISRIC Report 2019/01: Tier 1 and Tier 2 data in the context of the federated Global Soil Information System. Appendix 3"@en . _:b10688 . . _:b10688 . _:b10690 . _:b10689 . _:b10688 . _:b10690 . . _:b10689 . _:b10690 . _:b10688 . _:b10689 . _:b10689 .