Identifying true and false compound fertilizers is not an easy task and requires comprehensive judgment from many aspects.

Identifying true and false compound fertilizers is not an easy task and requires comprehensive judgment from many aspects. The following points may provide some reference for farmer friends: 1. Packaging details: Carefully observe the material, printing quality, information integrity, etc. of the packaging bag to see if there are any phenomena such as blurring or falling off writing. Formal product packaging has clear printing, neat fonts, and complete information. 2. Particle shape: The particles of high-quality compound fertilizer are uniform in size, consistent in color, and free of impurities; the particles of inferior compound fertilizer are of different sizes, uneven in color, and even have impurities or agglomerates. 3. Solubility test: Put a small amount of fertilizer into water and observe its dissolution speed and solution clarity. High-quality compound fertilizer dissolves quickly and the solution is clear and transparent; inferior compound fertilizer dissolves slowly and even has sediment or suspended matter.