First look: first look at whether the fertilizer is double-layered, whether the mark on the outer packaging, the production license number, the agricultural registration certificate number, the standard code, the total nutrient content, the name and address of the manufacturer, whether the inner bag is placed Product certification, etc., if the above-mentioned signs are incomplete, it may be a counterfeit product. Look at the fertilizer particles in the bag is consistent, no large lumps, less powder.
Second touch: grasp the half of the compound fertilizer by hand, leave a layer of grayish white powder on the hand and have a sticky feeling for the quality; if the particles are crushed, the fine white crystals are also shown as high quality compound fertilizer. The inferior compound fertilizer is mostly gray-black powder, has no adhesive feeling, and has no white crystals in the particles.
Three burns: Take a small amount of compound fertilizer on the iron, put it on the open flame, burn it with ammonia smell, indicate that it contains nitrogen, yellow flame indicates potassium, and the ammonia smell is thicker, the yellow flame is yellow, indicating nitrogen and potassium. The higher the content, the better the quality compound fertilizer. On the contrary, it is a poor quality compound fertilizer.
Four smells: Compound fertilizers generally have no odor (except organic and inorganic compound fertilizers), and if they have odor, they are inferior compound fertilizers.
Five solvents: high-quality compound fertilizer has good water solubility, most of which can be dissolved in water, even if there is a small amount of sediment, it is fine. The inferior compound fertilizer is hardly soluble in water, and the residue is rough and hard.
Six tastes: Because the market is relatively lack of potash, and the price is high, some unscrupulous manufacturers use red bricks to smash and act as potash. Potassium chloride is salty, while red brick granules are not salty. Therefore, you can take a trace of compound fertilizer when you buy it. If it is not salty, it is a fake product.
Hua County: Yue Xiuli
Second touch: grasp the half of the compound fertilizer by hand, leave a layer of grayish white powder on the hand and have a sticky feeling for the quality; if the particles are crushed, the fine white crystals are also shown as high quality compound fertilizer. The inferior compound fertilizer is mostly gray-black powder, has no adhesive feeling, and has no white crystals in the particles.
Three burns: Take a small amount of compound fertilizer on the iron, put it on the open flame, burn it with ammonia smell, indicate that it contains nitrogen, yellow flame indicates potassium, and the ammonia smell is thicker, the yellow flame is yellow, indicating nitrogen and potassium. The higher the content, the better the quality compound fertilizer. On the contrary, it is a poor quality compound fertilizer.
Four smells: Compound fertilizers generally have no odor (except organic and inorganic compound fertilizers), and if they have odor, they are inferior compound fertilizers.
Five solvents: high-quality compound fertilizer has good water solubility, most of which can be dissolved in water, even if there is a small amount of sediment, it is fine. The inferior compound fertilizer is hardly soluble in water, and the residue is rough and hard.
Six tastes: Because the market is relatively lack of potash, and the price is high, some unscrupulous manufacturers use red bricks to smash and act as potash. Potassium chloride is salty, while red brick granules are not salty. Therefore, you can take a trace of compound fertilizer when you buy it. If it is not salty, it is a fake product.
Hua County: Yue Xiuli
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