ISO 14820-2:2016规定了肥料和石灰材料样品的还原和制备方法，并规定了样品制备报告的要求。它还规定了从实验室肥料样品中制备供后续化学或物理分析用的试样和试验部分的方法。它不包括某些物理试验的样品制备，这些物理试验要求试验部分超过2kg。它适用于所有肥料。 注:除非另有说明，否则ISO 14820本部分正文中使用的术语“肥料”包括石灰材料。

ISO 14820-2:2016 specifies methods for the reduction and preparation of samples of fertilizers and liming materials and sets out the requirements for sample preparation reports. It also specifies methods for the preparation of test samples and test portions from laboratory samples of fertilizer for subsequent chemical or physical analysis. It does not cover the preparation of samples for certain physical tests which require test portions of more than 2 kg. It is applicable to all fertilizers. NOTE The term "fertilizer" is used throughout the body of this part of ISO 14820 and is taken to include liming materials unless otherwise indicated.