Identification of Potash Fertilizers in the Land

The identification of potash fertilizer ultimately depends on laboratory testing. The simple identification method of potash fertilizer introduced here is only a qualitative identification method, and the level of potassium cannot be identified, and the effect is limited.

1. Iron burning method. Fertilizer granules (large or small) are burned on a red-hot iron plate. Any non-melting, odorless, and heat-producing bounce phenomenon can be roughly classified as potassium fertilizer. If the iron plate is tilted to directly subject the fertilizer to high temperature combustion, a colored flame will appear. The golden shiny flame is sodium, and the pale yellow entrained lavender flame is potassium. There is also a kind of powdered potassium fertilizer, the color can be brick red, light red or white, the identification method is also burning on the iron sheet, potassium fertilizer showed no melting, no odor; while the performance of phosphorus fertilizer is light gray, although Not melting, but odor.

2. The saturated potassium fertilizer solution was burned on a wire coil and the flame color was observed. It was difficult to grasp the difference. However, if poor quality potassium fertilizers are encountered in the market, such as the use of unrefined potassium feldspar small or powdery, it is only through laboratory tests that the content of soluble potassium can be determined. Only the combustion method can only quantify and cannot be quantified. In other words, it can only distinguish between authenticity and falsehood, and it cannot distinguish between pros and cons.

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