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What are the methods for identifying controlled-release fertilizers?
What methods are used to identify controlled-release fertilizers? Please explain the identification methods. To identify genuine versus fake controlled-release fertilizer, you can refer to the following methods: The rub test: genuine fertilizer is not afraid of rubbing; its coating has good strength and high strength, and when you rub the granules with both hands, the coating does not lose color or come off; fake fertilizer is afraid of rubbing. Poor-quality or fake controlled-release fertilizer, because its strength does not reach...