ISO 18645:2016规定了水溶性肥料的试验方法、取样和制备、标记和标签以及包装、运输和储存的要求。 ISO 18645:2016适用于完全溶于水的水溶性肥料，适用于施肥和喷灌，以及叶面施用（叶面施肥）。

ISO 18645:2016 specifies the requirements for testing methods, sampling and preparation of test sample, marking and labelling, as well as package, transport, and storage of water soluble fertilizers. ISO 18645:2016 is applicable to water soluble fertilizers which are completely soluble in water and are suitable for fertigation and sprinkling irrigation, as well as for foliar application (foliar feeding).