Simple method to identify the authenticity of fertilizer, summarized as five words, "see, touch, smell, burn, wet."

one look:

(1) fertilizer packaging. Regular manufacturers of fertilizer, its packaging specifications, strong. Generally marked with production licenses, the implementation of standards, registration licenses, trademarks, product names, nutrient content (grade), net weight, name and address, etc; counterfeit fertilizer packaging is generally rough, marked on the package of information is unclear, poor quality, easy to leaking.

(2) the particle size of the fertilizer (or crystalline state). Nitrogen (except lime nitrogen outside) and potash mostly crystals; phosphate mostly lump or powdered amorphous, such as powdered calcium magnesium phosphate, calcium phosphate is more porous, massive: the size and proportion of high-quality fertilizer more uniform, smooth surface, easy to moisture absorption and caking. Such as: three elements of compound fertilizer produced in Russia (16 * 16 * 16) and the United States diammonium. The opposite surface counterfeit fertilizer, fertilizer particle size uneven, rough, humidity, easy to agglomerate.

(3) fertilizer color. Different Fertilizer has its unique color, lime nitrogen fertilizer in addition to almost all white outside, some slightly tan or light blue (except add the other ingredients); potash white or reddish, such as potassium dihydrogen phosphate is white; phosphate mostly dark gray, such as superphosphate, calcium magnesium phosphate is a gray, brown and other DAP, friends of farmers may do so substantially distinction.

Second, the touch: the fertilizer on the palm of the hand, firmly hold or press the rotation, according to feel judged fertilizer. With this approach, the United States diammonium discrimination more effective, grab a handful of fertilizer firmly grip several times, the "oil-wet" feeling is genuine, and dry as ever it is likely that flip fertilizer bogus. In addition, the use of fly ash posing as fertilizer, can also "feel", carried out summary judgment.

Third, olfactory: through special smell manure to simple judgment. There is a strong smell of ammonia, such as ammonium bicarbonate; ammonium sulfate slightly sour; sour taste superphosphate. And the smell of fake fertilizer is not obvious.

Fourth, burning: the fertilizer sample heating or combustion, flame color identification manure from the melt, the smoke, the residue so on.

(1) fertilizer ammonium bicarbonate, direct decomposition, the occurrence of a large number of white smoke, a strong ammonia odor, no residue; ammonium chloride, direct decomposition or sublimation occurs a lot of white smoke, a strong ammonia odor and sour, no residue ; urea, rapidly melting, white smoke, can invest in charcoal burning, or take a glass of white smoke exposure, the visibility on the glass with a layer of white crystals; ammonium nitrate, but does not melt and burn like boiling occurs , emitting ammonia odor of smoke.

(2) fertilizer superphosphate, calcium magnesium phosphate, phosphate powder on the red charcoal unchanged; bone darkening rapidly, and release coke smell.

(3) potassium sulfate, potassium chloride, potassium sulfate and magnesium on the red charcoal unchanged, issued a pair sound pops.

(4) fertilizer compound fertilizers and its raw material constituting the combustion is closely related to that, when the feed ammonia nitrogen or amide nitrogen, it will emit a strong odor of ammonia, and a large residue.