As the spring sowing approached, the majority of peasant consumers began to purchase chemical fertilizers for spring sowing. In order to reduce the loss of farmers and enhance their ability to identify, the industry and commerce departments reminded peasant consumers to pay attention to the four methods of identifying genuine and fake fertilizers.
The first is the fertilizer produced by the regular manufacturers of visual identification method. Its outer packaging is standardized and sturdy, and it is marked with production licenses, implementation standards, registration licenses, trademarks, product names, nutrient content (grades), net weight, factory name, and factory site. Telephone etc. The packaging of counterfeit and inferior fertilizers is generally rough, and the information on the packaging bags is unclear and the quality is poor and easy to leak.
Second, the hand-touch recognition method puts the fertilizer on the palm of the hand and holds it firmly or presses and turns to judge the fertilizer according to the feel. If there is a layer of grayish white powder on the hand and the sticky feeling is of good quality, grab a handful of fertilizer and hold it a few times. There is a sense of “oil and damp†and it is genuine, while the dry one is likely to be impersonated.
The third is the olfactory recognition method, that is, through the special odor of fertilizers to easily determine if ammonium bicarbonate has a strong ammonia odor, ammonium sulfate is slightly sour, calcium superphosphate has a sour taste, and counterfeit fertilizers are not obvious smell.
Fourth, the combustion identification method heats or burns the chemical fertilizer sample, and identifies the fertilizer from the flame color, melting condition, smoke taste, residue condition, and the like. Ammonium bicarbonate and ammonium chloride, directly decomposed, will produce a lot of white smoke, a strong ammonia smell, no residue. Urea can quickly melt, take a white smoke, can be burned into the charcoal fire, take a glass sheet contact with white smoke, you can see a glass layer attached to a white crystal.
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