How to identify true and false fertilizers

How to identify true and false fertilizers

The method of simply identifying the authenticity of fertilizers is summarized as five words: “look, touch, smell, burn, and wet”.
First, look at :
(1) Fertilizer packaging. Fertilizers produced by regular manufacturers are standardized and strong. Generally, there are production licenses, implementation standards, registration licenses, trademarks, product names, nutrient content (grade), net weight, factory name, factory address, etc.; the packaging of counterfeit and inferior fertilizers is generally rough, and the information on the packaging bags is unclear. Poor quality and easy to leak.
(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 block 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.

(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.

Second, touch:

Put the fertilizer on the palm of your hand, hold it firmly or press it to change the fertilizer according to your hand. Using this method, it is more effective to distinguish 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".

Third, sniff:

Simply judge by the special smell of the 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.

Fourth, burn:

The fertilizer sample is heated or burned to identify the fertilizer from the color of the flame, the melting condition, the smell of the smoke, the residue, and the like.

(1) Nitrogen fertilizer ammonium bicarbonate, directly decomposed, a large amount of white smoke occurs, has a strong ammonia smell, no residue; ammonium chloride, direct decomposition or sublimation occurs a large amount of white smoke, has a strong ammonia and sour taste, no residue Urea, can melt quickly, emit white smoke, can burn in charcoal fire, or take a glass sheet to contact white smoke, can see a layer of white crystals attached to the glass sheet; ammonium nitrate, does not burn but melts and appears boiled , there is smoke with ammonia smell.

(2) Phosphate fertilizer superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder, etc. have no change on red charcoal; bone powder quickly turns black, and emits burnt smell.

(3) Potassium fertilizer Potassium sulfate, potassium chloride, potassium magnesium sulfate, etc. have no change on the red charcoal, and a squeaking sound is heard.

(4) Combustion of compound fertilizers is closely related to its constituent materials. When there is ammonia nitrogen or amido nitrogen in the raw materials, it will emit strong ammonia smell and a large amount of residue.

Article source: Linyi Fertilizer Network

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