At present, counterfeit and compound fertilizers flood the market, and farmers' friends are really difficult to distinguish. Is there an easy-to-remember, easy-to-use method for identifying true and false compound fertilizers? The author summarizes several experiences and summarizes them in four words: burning, melting, looking and touching. (1) Burning - The compound fertilizer particles are heated or burned, and the fertilizer is identified from the flame color, melting condition, smoke taste, residue condition, and the like. When the high-quality compound fertilizer is burned, there will be three phenomena. First, it will bubbling. This is mainly the effect of nitrogen fertilizer, and then the combustion will be very prosperous. This is mainly because the phosphate fertilizer is burning. Again, there is a pale blue flame in the upper part of the flame. It is mainly caused by the burning of potassium. The high-quality compound fertilizer burns completely without residue. (2) Dissolve - Dissolve the compound fertilizer granules in the water to distinguish them. The compound fertilizer granules are placed in a small amount of water. After a period of time, the fertilizer can be judged according to the dissolution of the fertilizer. The compound fertilizer particles will diverge, dissolve or have a little residue. After shaking, the solution will be transparent and stable with almost no residue. The counterfeit compound fertilizers have poor solubility or do not dissolve at all. (3) Look - First of all, look at fertilizer packaging. The compound fertilizers produced by regular manufacturers are standardized and solid-packed. For example, "Sunny Sky" series compound fertilizers are marked with trademarks, product names, nutrient contents (grades), net weight, factory name, site, telephone number, and national free service telephone number; The packaging of fake and inferior compound fertilizers is generally rough, and the information on the packaging bags is unclear, poor quality, and easy to leak. Second, look at the particle size (or crystalline state) of the compound fertilizer. The high-quality compound fertilizer has a uniform particle size and specific gravity, a smooth surface, and is not easy to absorb moisture and agglomerate. The opposite is true of counterfeit fertilizers, fertilizers are uneven in size, rough, high humidity, easy to agglomerate. Again, look at the color of the fertilizer. The color of the high-quality compound fertilizer is very uniform and there is no obvious color difference. For example, the yellow compound fertilizer particles have a yellowness of 6-9, and the entire particle is uniform from the inside to the outside. The fake compound fertilizer is very light in color, and most of it is painted on the surface. (4) Touch - Put the fertilizer on the palm of your hand, hold it firmly or press it, and judge the fertilizer according to your hand. Grab a handful of fertilizer and hold it a few times. The “oily†feeling is genuine; if it is a peasant friend who has han liquid on hand, it will be firmly dissolved in the hand and there will be obvious dissolved compound fertilizer in the hand. Drying, as it were, is likely to be caused by a flip-chip compound fertilizer. (Zhao Chuanjun) Fei County Mingtao Electronic Co.,Ltd , https://www.yourbeautyassistant.com