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How to identify superior and inferior compound fertilizers
Due to its nutrient-rich, targeted fertilizers, convenient use, and high fertilizer efficiency, compound fertilizers are welcomed by farmers. In recent years, some unscrupulous manufacturers have been making huge profits to produce large quantities of fake and inferior compound fertilizers, which has caused great losses to farmers and agricultural production. To this end, the simple identification method of the advantages and disadvantages of the compound fertilizer is described as follows: A look: first look at whether the fertilizer is a double-layer packaging, whether the packaging is marked with a trademark, production license number, agricultural use registration number, standard code, The total amount of nutrients, the name and address of the manufacturer, whether or not there is a product certificate in the inner bag, etc. If the above labels are incomplete, it may be a counterfeit product. Look at whether the fertilizer particles in the bag are the same, no big lump, and less powder. Second touch: rubbed the compound fertilizer by hand and knead it. There was a layer of gray powder on the hand and a sticky sensation was of good quality. If the granules were touched, fine white crystals were also shown as high-quality compound fertilizer. Inferior compound fertilizers are mostly gray-black powders, with no sticky sensation, and there are no white crystals in the granules. Three-burning: Take a small amount of compound fertilizer placed on the iron skin, burning on an open flame, there is ammonia odor that contains nitrogen, yellow flame shows that there is potassium, and the stronger the ammonia odor, the yellower the yellow flame, indicating that nitrogen, potassium The higher the content, the higher quality compound fertilizer. On the contrary, it is a poor quality compound fertilizer. Four reports: Compound fertilizers generally have no odor (except organic-inorganic compound fertilizers). If they have odor, they are poor quality compound fertilizers. Five soluble: High-quality compound fertilizer has good water solubility, and most of the soaked in water can be dissolved, even if there is a small amount of precipitate, it is also smaller. The poor quality compound fertilizer is hardly soluble in water and the residue is rough and hard. Six tastes: Due to the relative lack of potash fertilizer on the market, and the high price, some illegal manufacturers act as potash fertilizers after being crushed with red bricks. Potassium chloride has a salty taste, while red brick particles do not have a salty taste. Therefore, a small amount of compound fertilizer can be sampled at the time of purchase. If there is no salty taste, it is a shoddy product.
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