Buy fertilizers should be cautious to identify true and false
That is to see two grips, three sniffs, four burns and five wet.
At first glance, it is to look at the outer packaging, granularity and color of the fertilizer, the specifications and firmness of the regular production of the fertilizer, and the product name, the name and address of the production enterprise, the production license number, the fertilizer registration certificate number, and the execution. Standard number, active ingredient, net weight, date of manufacture, quality shelf life, etc. Look at the consistency of the inspection report and packaging instructions. The total nutrient content is the content of nitrogen, phosphorus and potassium, and the trace element content should not be included.
The second grip means placing the fertilizer in the hand, holding a grip firmly, pressing and turning, and judging according to the hand feeling. It is true that the oil is wet in the hand and the particles are even and smooth.
Three-smelling refers to the method of identifying fertilizer by the special smell of fertilizer. For example, ammonium bicarbonate has a strong ammonia smell, and ammonium sulfate has a sour taste. Generally, fake fertilizer has no smell.
Four-burning refers to the heating or burning of a fertilizer sample, which is identified by the burning condition, the generated smoke, the melting condition, and the residue.
Five-wet refers to the identification of the solubility of the fertilizer, and the fertilizer is dissolved in water to see its solubility. It is difficult to identify the true and false appearance of urea. Put the urea in a glass and pour it into distilled water (or pure water) to stir it thoroughly. If it is dissolved in water, it is true. If it appears, it is fake.
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