_:b10641 . . "ISRIC Report 2019/01: Tier 1 and Tier 2 data in the context of the federated Global Soil Information System. Appendix 3"@en . "PotassiumExtractableElements"@en . _:b10641 . _:b10640 . _:b10640 . _:b10640 . _:b10639 . _:b10639 . _:b10639 . _:b10640 . _:b10641 . _:b10641 . _:b10639 . .