First look at whether the fertilizer is double-layered, and then see whether the trademark, production license number, agricultural use registration number, standard code, total nutrient content, name and address of the production company are indicated on the outer bag. Finally, see if the inner bag is inside. If you have a product certificate, if the above logo is not complete, it may be a fake product. The national standard stipulates that the moisture content of the three-element low-concentration compound fertilizer should be less than or equal to 5%. If it exceeds this index, it will feel sticky when caught in the hand and can be kneaded into a cake. Take a small amount of compound fertilizer on the iron, and put it on the open flame to burn. There is ammonia smell indicating nitrogen, and a yellow flame indicates potassium.
Compound fertilizers generally have no odor. If there is odor, it is because the basic raw material nitrogen fertilizer mainly uses agricultural ammonium carbonate, or the basic raw material phosphate fertilizer contains toxic substance trichloroethane (acid). When trichloroacetaldehyde (acid) enters the farmland, it will cause burning of the seedlings, but the crops will not be harvested, and the toxic residue period will be long, which will affect the growth of the next season crop. Therefore, it is best for farmers' friends not to buy compound fertilizers with odors. The 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 sediment, it is fine. The inferior compound fertilizer is hardly soluble in water, and the residue is rough and hard. Because the market is relatively short of potash, the price is higher, and some unscrupulous manufacturers will crush the red brick and act as potash. At the time of purchase, the farmer friend can taste the red granules in a small amount, the potassium chloride is salty, and the red brick granules are not salty.
Anxi County Agriculture and Tea Bureau
Compound fertilizers generally have no odor. If there is odor, it is because the basic raw material nitrogen fertilizer mainly uses agricultural ammonium carbonate, or the basic raw material phosphate fertilizer contains toxic substance trichloroethane (acid). When trichloroacetaldehyde (acid) enters the farmland, it will cause burning of the seedlings, but the crops will not be harvested, and the toxic residue period will be long, which will affect the growth of the next season crop. Therefore, it is best for farmers' friends not to buy compound fertilizers with odors. The 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 sediment, it is fine. The inferior compound fertilizer is hardly soluble in water, and the residue is rough and hard. Because the market is relatively short of potash, the price is higher, and some unscrupulous manufacturers will crush the red brick and act as potash. At the time of purchase, the farmer friend can taste the red granules in a small amount, the potassium chloride is salty, and the red brick granules are not salty.
Anxi County Agriculture and Tea Bureau
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