How to identify genuine and fake fertilizers?
(1) Package identification method. A, check the logo. According to the regulations of the relevant state departments, the fertilizer packaging bag must indicate: product name, nutrient content, grade, net weight, standard code, factory number, and site; the phosphate fertilizer should be marked with the production license number; the compound fertilizer should be marked with the production license number and fertilizer registration code. New fertilizers such as commodity organic fertilizers, foliar fertilizers and microbial fertilizers shall be marked with fertilizer registration certificates. If there is no such sign and the sign is incomplete, it may be pseudo-changer or inferior fertilizer. B. Check the sealing of the bags. Special attention should be paid to the fertilizers that have obvious sealing marks on the bags. This phenomenon may be adulterated.
(2) Shape, color identification method. A, urea: white or light yellow, granular, acicular or prismatic crystals, no powder or little powder. B, ammonium sulfate: white crystals. C. Ammonium chloride: white or pale yellow crystals. D. Ammonium bicarbonate. White powder or non-straight granular crystals. E, superphosphate. Off-white light red particles or powder. G, potassium sulfate. White crystals or powder. H, potassium chloride. White or light red particles.
(3) Odor identification method. If there is a significant pungent ammonia granule is ammonium bicarbonate, fine sour powder is heavy calcium superphosphate. In the case of perphosphoric acid, this fertilizer is very toxic and can easily damage or burn plants, especially if the seedbed cannot be used. What needs to be reminded is that although some chemical fertilizers are real, but the amount is very low, such as inferior superphosphate, the effective phosphorus content is less than 8% (the minimum standard should reach 12%). These fertilizers are poor quality chemical fertilizers and have poor fertilizer efficiency. Also pay attention.
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