The particles of the true compound fertilizer are round and uniform in size, and the pseudo compound fertilizer particles have different shapes and severe granules.
Take a few pieces of compound fertilizer and put it at a height of 1.5 meters to let it fall freely, repeating two or three times. If the sound is sharp, it will be true.
The proportion of compound fertilizer is larger than that of fake compound fertilizer. It is the same as 25 kg compound fertilizer. The volume of real fertilizer is small and the volume of fake fertilizer is large. Put a little compound fertilizer in a damp plate and let it absorb moisture for three or four minutes. The moisture absorption speed is fast and the moisture absorption rate is slow.
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