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base saturation (basesat)>(%)>facultatief>verplicht>labex l8703-26-1-1>na>(mg/kg)>fe>facultatief>extractie met koningswater>al>(mg/kg)>facultatief>facultatief>extractie met koningswater
base saturation (basesat)>(%)>optional>mandatory>labex l8703-26-1-1>sodium (na)>(mg/kg)>optional>optional>extractant: aqua regia>aluminium (al)>(mg/kg)>optional>optional>extractant: aqua regia