1. Outer packaging identification method. The compound fertilizer packaging bag must indicate the product name, nutrient content (grade), trademark, net weight, standard code, factory name, production license number and registration number. If the above marks are not or incomplete, the packaging is rough. It may be a fake compound. 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, open the package should have a certificate, but also pay attention to the date of production, the longer the compound fertilizer storage time, the total nutrients will be reduced.
2. Simple visual method. In general, as long as it is genuine, the compound fertilizer has to undergo a complicated process, such as extrusion granulation, disc granulation, drum granulation or high tower granulation, etc., the color performance is simple, or grayish white or light gray, very Less mottled, and the granulation is more uniform, round or cylindrical. Most of the fake and inferior compound fertilizers are not deep-processed, which are made by rough or general mixing, the color is not pure, and the granulation is uneven, and some are not even granulated and floured.
3, hand pinch feeling method. The real compound fertilizer is generally cooled and granulated by high temperature melting and then dried. It has good stability, high hardness and consistent hardness. Hand pinch is not easy to break, and it is not easy to be soft. However, the hardness of the fake and inferior compound fertilizer is inferior, the hardness is inconsistent, the hand is pinched easily, or it is muddy.