Touch, grab a compound fertilizer and hold it several times. The quality of “oily wet†is relatively reliable. If you touch the compound fertilizer in your hand and then rub it with your hand, you will feel obvious dissolved compound fertilizer and compound fertilizer on your hand. The gloss is bright and the quality of this product is relatively reliable. Drying is probably a fake.
Dissolve, put the compound fertilizer particles in a small amount of water, after a period of time, can be judged according to the dissolution of the fertilizer. The compound fertilizer particles will diverge and dissolve, and after shaking, the solution will be stable with almost no residue. The counterfeit compound fertilizer has poor solubility or does not dissolve at all.
Burning and cauterizing methods are the main methods for distinguishing between true and false compound fertilizers and identifying the concentration. The compound fertilizer particles are heated or burned, and the advantages and disadvantages of the fertilizer are identified from the melting condition, the smoke, the smoke smell and the residue. After heating, the compound fertilizer will bubble and melt (the more nitrogen melts faster), emit smoke, and emit ammonia smell, the particle deformation becomes smaller, and the higher the concentration, the less the residue. The high-quality high-concentration compound fertilizer burns very completely with almost no residue. Conversely, those that cannot burn or burn but have no ammonia smell are likely to be fake compound fertilizers.
The above is just a simple identification of the superior and inferior compound fertilizer from the senses. If you want to buy a safe fertilizer, you are advised that when purchasing compound fertilizer, you must go to a reputable dealership to buy products that are used in agricultural production with obvious effects and good reputation. Don't buy compound fertilizers for hawkers who have no fixed homes in the streets to prevent the purchase of counterfeit and shoddy products.
How to identify true and false compound fertilizer
Look, first look at the packaging of compound fertilizer. The relevant state departments stipulate that the product name, nutrient content (grade), trademark, net weight, standard code, factory name, production license number and registration number must be indicated on the compound fertilizer packaging bag. If the above-mentioned mark is not or incomplete The packaging is rough and may be a fake and inferior compound fertilizer. Special attention should be paid to the compound fertilizer with obvious sealing marks on the sealing of the bag. This phenomenon may be adulterated. In addition, pay attention to the date of production. The longer the compound fertilizer is stored, the less the total nutrients will be. Second, look at the particle size (or crystalline state) of the compound fertilizer. The high-quality compound fertilizer has uniform particle size and specific gravity, and the surface is smooth, not easy to absorb moisture and agglomerate. The fake and inferior compound fertilizer is just the opposite. The uneven particle size is rough, the humidity is high, and it is easy to agglomerate. Third, look at the color of the compound fertilizer. The color of the high-quality compound fertilizer is very uniform, there is no obvious color difference, and the whole particle is uniform from the inside to the outside. Most of the fake compound fertilizers are painted on the surface.
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