Farmers' friends tend to buy spring plows and fertilizers in winter. In order to prevent them from buying fake fertilizers and poor quality fertilizers, they should learn some ways to identify chemical fertilizers.
First, the package inspection. The outer packaging is a woven bag, the inner packaging is a plastic bag, the packaging bag is machine-stitched, and the seams should be neat and consistent. The national regulations shall specify the trademark, fertilizer name, manufacturer, fertilizer composition (specify nitrogen, phosphorus, potassium content and trace element content), product net weight and standard code, and the quality certificate shall be attached to each batch of manufactured products. . There are bulk products of superphosphate, but they must also be accompanied by factory certificates.
Second, appearance inspection.
1. Seeing. Fertilizer particles have good gloss and bright colors, and they are dark and light.
2. Handcuffs. Put the palm of your hand into a fertilizer and twist it twice. If you don't break it, you will be better off.
3. Water soluble. Take a small amount of nitrogen and potassium fertilizer into the water and stir for 5 minutes. It can be completely dissolved and is not completely dissolved. Diammonium phosphate dissolves in water, but the melting time is longer.
4. Fire. High-quality nitrogen fertilizers and phosphate fertilizers can be fired. The longer the melting time, the less the remaining impurities the better. The melting time is short, and the remaining impurities are mostly poor. Urea can be burned with fire and emit white smoke when the temperature is high. Diammonium can be burned with fire, and the longer the melting, the better. Compound fertilizers can be burned with fire, and the longer it takes to melt, the better. Phosphate fertilizer is not used for fire, so the quality is relatively poor. Compound fertilizer can not be used for fire, inferior fertilizer is it.
5. Potash. There are white, red, pink, red potash fertilizer is generally imported potassium, the best quality, potassium taste with the tongue, spicy taste is superior, spicy taste is inferior. Compound fertilizer tasted spicy with its tongue, indicating that it contained potassium.
6. BB fertilizer. It is made by mixing large particles of urea, diammonium phosphate, and potassium parent fertilizers. Urea and potassium parent fertilizers can be used to open water. Diammonium phosphate can be dissolved in water for a long time. In addition, diammonium phosphate can be burned with fire. .
Third, when purchasing chemical fertilizers, it is necessary to leave receipts and related tickets, so that when problems occur, they can vouch for claims.
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