This standard specifies test methods for the determination of copper, iron, manganese, zinc, boron and molybdenum contents in water-soluble fertilizers. This standard is applicable to the determination of copper, iron, manganese, zinc, boron and molybdenum content in liquid or solid water-soluble fertilizers. Appendix A of this standard specifies test methods for the simultaneous determination of copper, iron, manganese, zinc, boron, and molybdenum contents in liquid or solid fertilizers.