As agricultural inputs continue to increase, a wide variety of fertilizers are coming to market. Driven by the interests, some lawless elements sell fake and inferior fertilizers, pit farmers and farmers, seriously affecting agricultural production and farmers' enthusiasm for farming. In order to prevent farmers from being deceived and protect the legitimate rights and interests of farmers, several methods for easily identifying the authenticity of fertilizers are introduced, which is convenient for farmers to grasp and apply. Summarized into five words "look, touch, smell, burn, wet".
1, look: 1.1 fertilizer packaging. Fertilizers produced by regular manufacturers are standardized and strong. Generally, there are trademarks, product names, nutrient content (grade), net weight, factory name, factory address, etc.; the packaging of counterfeit and inferior fertilizers is generally rough, the information on the packaging bags is unclear, the quality is poor, and it is easy to break.
1.2 The particle size (or crystalline state) of the fertilizer. Nitrogen fertilizer (except lime nitrogen) and potassium fertilizer are mostly crystalline; phosphate fertilizer is mostly blocky or powdery amorphous, such as calcium magnesium phosphate fertilizer is powdery, superphosphate is mostly porous, massive; high quality compound fertilizer granularity and specific gravity More uniform, smooth surface, not easy to absorb moisture and agglomerate. Such as: Russian-made three-element compound fertilizer (16 * 16 * 16) and the United States diammonium. On the contrary, the fertilizer particles are uneven in size, rough, humid, and easy to agglomerate.
1.3 The color of the fertilizer. Different fertilizers have their own unique colors. Nitrogen fertilizer is almost all white except 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; Phosphate fertilizer is mostly dark gray, such as superphosphate, calcium magnesium phosphate is gray, diammonium phosphate is brown, etc., farmers can make a rough distinction.
2. Touch: Put the fertilizer on the palm of your hand, hold it firmly or press it, and judge the fertilizer 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. If there is a "wet" feeling, it is genuine; and if it is dry, it is likely to be impersonated with a flip-chip compound fertilizer. In addition, the use of fly ash as a phosphate fertilizer can also be easily judged by "feel".
3. Sniffing: Simple judgment by the special smell of fertilizer. For example, ammonium bicarbonate has a strong ammonia odor; ammonium sulfate is slightly sour; superphosphate has a sour taste. The fake and inferior fertilizers are not obvious.
4. Burning: The fertilizer sample is heated or burned, and the fertilizer is identified from the color of the flame, the melting condition, the smell of the smoke, and the residue. 4.1 Nitrogen fertilizer ammonium bicarbonate, direct decomposition, a large amount of white smoke, strong ammonia smell, no residue; ammonium chloride, direct decomposition or sublimation occurs a lot of white smoke, strong ammonia and sour taste, no residue Urea, can be quickly melted, white smoke, can be burned in a charcoal fire, or when a glass piece is exposed to white smoke, a white crystal is attached to the glass sheet; ammonium nitrate does not burn but melts and appears to be boiling. Smoke with ammonia smells.
4.2 Phosphate fertilizer superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder, etc. have no change on red charcoal; bone powder is quickly blackened, releasing a burnt smell.
4.3 Potassium Fertilizer Potassium Sulfate, Potassium Chloride, Potassium Magnesium Sulfate, etc. have no change on the red charcoal. 4.4 Compound Fertilizer 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.
5, wet: If the appearance of the observation is not easy to identify fertilizer varieties, it can also be distinguished according to the dissolution in the water. Spread the fertilizer granules on wet ground or wet with a small amount of water. After a period of time, judge according to the dissolution of the fertilizer. Such as ammonium nitrate, diammonium, potassium sulfate, potassium chloride, etc. can be completely dissolved (chemical), superphosphate, heavy superphosphate, calcium ammonium nitrate and other parts of the dissolution; compound fertilizer particles will be scattered, dissolved or a little residue, The fake and inferior fertilizers are poorly soluble or do not dissolve at all (except for phosphate fertilizer).
Of course, the above is only the most intuitive and simple identification method, and it is not possible to make accurate judgments on fertilizers. If you want to accurately understand the nutrient content in fertilizers and distinguish between true and false fertilizers, it is best to send the fertilizer to the local fertilizer station for chemical testing.
1, look: 1.1 fertilizer packaging. Fertilizers produced by regular manufacturers are standardized and strong. Generally, there are trademarks, product names, nutrient content (grade), net weight, factory name, factory address, etc.; the packaging of counterfeit and inferior fertilizers is generally rough, the information on the packaging bags is unclear, the quality is poor, and it is easy to break.
1.2 The particle size (or crystalline state) of the fertilizer. Nitrogen fertilizer (except lime nitrogen) and potassium fertilizer are mostly crystalline; phosphate fertilizer is mostly blocky or powdery amorphous, such as calcium magnesium phosphate fertilizer is powdery, superphosphate is mostly porous, massive; high quality compound fertilizer granularity and specific gravity More uniform, smooth surface, not easy to absorb moisture and agglomerate. Such as: Russian-made three-element compound fertilizer (16 * 16 * 16) and the United States diammonium. On the contrary, the fertilizer particles are uneven in size, rough, humid, and easy to agglomerate.
1.3 The color of the fertilizer. Different fertilizers have their own unique colors. Nitrogen fertilizer is almost all white except 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; Phosphate fertilizer is mostly dark gray, such as superphosphate, calcium magnesium phosphate is gray, diammonium phosphate is brown, etc., farmers can make a rough distinction.
2. Touch: Put the fertilizer on the palm of your hand, hold it firmly or press it, and judge the fertilizer 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. If there is a "wet" feeling, it is genuine; and if it is dry, it is likely to be impersonated with a flip-chip compound fertilizer. In addition, the use of fly ash as a phosphate fertilizer can also be easily judged by "feel".
3. Sniffing: Simple judgment by the special smell of fertilizer. For example, ammonium bicarbonate has a strong ammonia odor; ammonium sulfate is slightly sour; superphosphate has a sour taste. The fake and inferior fertilizers are not obvious.
4. Burning: The fertilizer sample is heated or burned, and the fertilizer is identified from the color of the flame, the melting condition, the smell of the smoke, and the residue. 4.1 Nitrogen fertilizer ammonium bicarbonate, direct decomposition, a large amount of white smoke, strong ammonia smell, no residue; ammonium chloride, direct decomposition or sublimation occurs a lot of white smoke, strong ammonia and sour taste, no residue Urea, can be quickly melted, white smoke, can be burned in a charcoal fire, or when a glass piece is exposed to white smoke, a white crystal is attached to the glass sheet; ammonium nitrate does not burn but melts and appears to be boiling. Smoke with ammonia smells.
4.2 Phosphate fertilizer superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder, etc. have no change on red charcoal; bone powder is quickly blackened, releasing a burnt smell.
4.3 Potassium Fertilizer Potassium Sulfate, Potassium Chloride, Potassium Magnesium Sulfate, etc. have no change on the red charcoal. 4.4 Compound Fertilizer 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.
5, wet: If the appearance of the observation is not easy to identify fertilizer varieties, it can also be distinguished according to the dissolution in the water. Spread the fertilizer granules on wet ground or wet with a small amount of water. After a period of time, judge according to the dissolution of the fertilizer. Such as ammonium nitrate, diammonium, potassium sulfate, potassium chloride, etc. can be completely dissolved (chemical), superphosphate, heavy superphosphate, calcium ammonium nitrate and other parts of the dissolution; compound fertilizer particles will be scattered, dissolved or a little residue, The fake and inferior fertilizers are poorly soluble or do not dissolve at all (except for phosphate fertilizer).
Of course, the above is only the most intuitive and simple identification method, and it is not possible to make accurate judgments on fertilizers. If you want to accurately understand the nutrient content in fertilizers and distinguish between true and false fertilizers, it is best to send the fertilizer to the local fertilizer station for chemical testing.
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