At present, it is the peak season for sales of fertilizers. There are many types and types of fertilizer on the market, and the quality of the fertilizers varies from true to false, from good to bad, and from high to low. To prevent the people from being deceived, teach the people how to know how to judge the quality of fertilizer products.
A look: first look at whether there is double-layer fertilizer packaging, packaging is marked on the mark, production license number, fertilizer registration number, standard code, total nutrient content, the name and address of the production company, whether the inner bag product certification and so on. Look at whether the fertilizer granules are even and uniform. There are no large lumps and powders are excellent products. If the above marks are incomplete, agglomerates or powders may be inferior products.
Two kneading: Grab a compound fertilizer and knead it with a hand. There are grayish white powders on the hands, and there is excellent adhesion and slickness. If the fine white crystals are visible in the grains, it is also a good quality compound fertilizer. The poor quality compound fertilizers are mostly grayish black powders with no sensation of sticking and no white crystals in the granules.
Three burning: Take a small amount of compound fertilizer placed on the tin, on the open fire burning, there is ammonia smell and the yellow flame shows that contains nitrogen and potassium, and the more concentrated the ammonia odor, the yellower the yellow flame, indicating that the higher the nitrogen and potassium content It is a high-quality compound fertilizer. On the contrary, it is a poor quality compound fertilizer.
Four News: Under normal conditions, compound fertilizers generally have no peculiar smell (except for organic-inorganic compound fertilizers). If there are odors, they are inferior compound fertilizers.
Wu Rong: Put a bowl of water and put some fertilizer to observe its dissolution. The high-quality compound fertilizer has good water solubility and can be dissolved in most of the water. Even if there is a small amount of sediment, it is also small. The poor quality compound fertilizer is hardly soluble in water, and the residue is rough and numerous.
Six tastes: Potassium in compound fertilizers is usually potassium chloride or potassium sulfate. These potassium salts have a salty taste. When you purchase, you can take a small amount of compound fertilizer in your mouth. There is salty taste as a genuine product. If there is no salty taste, It is a shoddy product.
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