Nitrogen fertilizer
In the market, generally, ammonium nitrate and polyvalent alcohol are used to impersonate farmers and can be identified by the following methods at the time of purchase: First, appearance. Urea, ammonium nitrate and polyols are white, odorless particles. The urea does not emit light on the surface; the surface of the ammonium nitrate particles is brightly reflective; the polyol white has no shiny color and light reflection. The second is the feel. The urea is smooth and loose, with no moist feeling; the ammonium nitrate is smooth, but has a moist feeling; while the polyol is loose, not very smooth, and has no moist feeling. The third is a fire. The urea can be quickly burned, white smoke, and nitrogen odor on red-hot charcoal or iron flakes; the ammonium nitrate is intensely burned, emits strong light, emits white smoke and is accompanied by the sound of “squeakingâ€; The alcohol disperses and burns without nitrogen odor.
Phosphate fertilizer
In the market, unscrupulous traders generally use phosphorus phosphogypsum, calcium magnesium phosphate fertilizer and waste cement slag as a phosphorus fertilizer, which can be identified by the following methods: First, appearance. True phosphorous fertilizers are dark gray, grayish or light gray loose powders, with sour taste; phosphogypsum is an off-white hexagonal shape or mixed powder, no sour taste; calcium magnesium phosphate fertilizer and phosphorous fertilizer are similar in color, and the shape is glassy fines or fine particles. No sour taste; waste cement slag is gray powder, non-glossy, there are more hard objects, and no sour taste. The second is the feel. Phosphate fertilizers are heavy, brittle but not frivolous. Phosphogypsum is light, thick, and dry. Waste cement slag is heavier than phosphate, is not greasy, has no cotton, and has a hard material. The third is water solubility. Phosphorus fertilizer is partially soluble in water; phosphogypsum is completely soluble in water; waste cement slag is slurried after being dissolved in water and can be resolidified.
Potash fertilizer
The first is taste: Potash has a pungent sensation. The second is burning: Potassium fertilizers are burnt and cracked on iron plates. If it burns, it melts or emits white smoke and nitrogen odor is nitrogen fertilizer.
Finally, to remind farmers friends, when buying fertilizer, do not buy fertilizers sold by small merchants who run in villages and villages. They must go to qualified and regular stores to purchase. Before buying, pay attention to whether the fertilizer packaging meets the requirements (production address, telephone, Content, etc.) Whether the three certificates are complete (production license, fertilizer registration certificate, product certification), and request for purchase invoices.
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