"Because of the profit-driven, there are some speculative manufacturers on the market who are taking risks. They sell the fake and fake fertilizers with exquisite packaging, insufficient content and brand name to the rural fields, so that farmers who are not aware of the prevention will be deceived accidentally. If you put these fake and degraded fertilizers into the ground, it will not only increase the income of the peasants, but will cause crops to be reduced or even harvested, which will cause farmers to suffer." Spring ploughing soon, Shandong Province Fertilizer Yang Chunsheng, president of the Industrial Association, recently made the above speech in an interview with reporters. He reminded the peasants that although it is more difficult to distinguish the quality of chemical fertilizers, especially nutrients, it is possible to reduce the number of deceives and fools if you keep in mind the words “When you read and askâ€.
Based on his accumulated experience over the years, President Yang also elaborated on how to use the technique of “seeking and asking questions†to distinguish the authenticity of chemical fertilizers.
"Wang" is a relatively important part, that is, to look carefully. The first is to look at the packaging to see if it is a famous brand of fertilizer, whether it is a brand-name fertilizer that is confused with the brand-name manufacturer packaging. The product name, nutrient content, trademark, net weight, standard code, factory name, factory address, production license number, and fertilizer registration certificate number must be indicated on the commercial fertilizer packaging bag. If the above-mentioned mark is not or incomplete, it may be fake fertilizer. Second, look at the seal. Special attention should be paid to fertilizers with obvious unsealing marks on the bag closure. This fertilizer may be adulterated. Three look at the shape. Nitrogen fertilizer (except lime nitrogen) and potassium fertilizer are mostly crystalline, phosphate fertilizer is mostly block or powdery amorphous, calcium magnesium phosphate fertilizer is powdery, and superphosphate is mostly porous. The compound fertilizer has relatively uniform particle size, smooth surface, and is not easy to absorb moisture and agglomerate; the compound fertilizer with uneven particle size, roughness, high humidity and easy agglomeration can be judged to be false. Four to see the color. Different chemical fertilizers have their own unique colors. The nitrogen fertilizer is almost all white except for lime nitrogen, some are slightly yellowish brown or light blue (except for adding other ingredients); potassium fertilizer is white or slightly reddish, such as potassium dihydrogen phosphate is white; Most of the phosphate fertilizer is dark gray, such as superphosphate, calcium magnesium phosphate is gray, and diammonium phosphate is brown. Farmer friends can make a rough distinction based on this.
"Smell" is simply sniffed by the nose and judged by the special smell of chemical fertilizer. For example, ammonium bicarbonate has a strong ammonia odor, ammonium sulfate has a slightly sour taste, superphosphate has a sour taste, and counterfeit and degraded fertilizer has a odor. If the superphosphate uses waste sulfuric acid in the production process, it will produce a strong pungent smell of acid. This fertilizer has great toxicity, and it is very easy to damage or burn the crops, so that the farmers' harvest will be lost.
"Q" is a more practical part. When a chemical fertilizer sample is burned or dissolved in water, the authenticity of the fertilizer can be identified from the color of the flame, the melting condition, the smell of smoke, and the residue. Nitrogen fertilizer, ammonium bicarbonate directly decomposes, produces a large amount of white smoke, has a strong ammonia smell, no residue; direct decomposition or sublimation of ammonium chloride produces a large amount of white smoke, strong ammonia and sour taste, no residue; urea energy Rapid melting, white smoke, can be burned in charcoal fire; ammonium nitrate does not burn, but melts and appears to be boiling, emitting ammonia-smelling smoke; superphosphate, calcium magnesium phosphate, phosphate rock, etc. quickly turn black, and It emits a burnt smell; potassium sulfate, potassium chloride, potassium magnesium sulfate, etc. make a squeaking sound. The combustion of compound fertilizer is closely related to its constituent materials. When there is ammonia nitrogen or amido nitrogen in the raw material, it will emit strong ammonia smell and a large amount of residue. It is also possible to put the appropriate amount of fertilizer in a clean glassware, and shake it with cold water to see how it dissolves. Nitrogen and potassium fertilizers are all dissolved. If there is turbidity, it is fake and inferior fertilizer; superphosphate is soluble in water and has residue; heavy superphosphate is soluble in water, no residue or residue is small; soluble in water but with large ammonia smell It is ammonium bicarbonate; lime nitrogen is insoluble in water, and bubbles are generated and have a chlorine smell of calcium carbide.
The so-called "cut" is touched by hand. Put the fertilizer in the palm of your hand, hold it firmly or press it to judge the authenticity according to the hand feeling. Using this method, it is more effective to discriminate the diammonium in the United States. Grasp a handful of fertilizer and hold it several times. It has a "wet" feeling, and the surface should be smooth. Generally, the dry and rough surface are mostly fake and inferior products.
What needs more attention is that although some fertilizer products are true, the effective nutrient content of fertilizers is not up to standard or very low. If this happens, you should go to the local fertilizer authority to complain and collect or keep some samples. Ask for the purchase of relevant invoices for fertilizers, etc., in order to provide the necessary evidence to protect their legitimate rights and interests.
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