First, look at the packaging
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 uniform. The national regulations should mark the trademark, fertilizer name, manufacturer, site, fertilizer composition (specify nitrogen, phosphorus, potassium content and trace element content), grade, product net weight and standard code, production license number and other signs. If the above signs are not or incomplete, they may be fake fertilizers or inferior fertilizers.
Second, look at the appearance
1. Seeing. The fertilizer has good luster and bright colors, and it is dark and dull.
2. Handcuffs. Put the palm of your hand into the fertilizer, and twist it twice. If you don't break it, it's better, and the harder the better.
3. Water soluble. Take a small amount of nitrogen fertilizer and potassium fertilizer and stir it in water for 5 minutes. It can be completely dissolved to be excellent, and it cannot be completely dissolved. Diammonium phosphate can be dissolved in water, but the dissolution time is longer.
4. Fire. High-quality nitrogen fertilizer and phosphate fertilizer can be fired. The longer the melting time, the less the remaining impurities are. The shorter the melting time and the worse the residual impurities. Urea can be burned with fire, and white smoke is emitted when the temperature is high. Diammonium can be burned by fire, and the longer the melting, the better. The compound fertilizer can be burned by fire, and the longer the melting time, the better. Phosphate fertilizer does not burn, so the quality is relatively poor. The compound fertilizer is not burnt, and the inferior fertilizer is it.
5. Potash fertilizer. There are white, red, pink, red potassium fertilizer is generally imported potassium fertilizer, the best quality, potassium fertilizer tastes with tongue, spicy taste is excellent, spicy taste is small. The compound fertilizer tastes spicy with the tongue, indicating that it contains potassium.
6. BB fat. It is made by blending large granular urea, diammonium phosphate and potassium parent fertilizer. The urea and potassium parent fertilizer can be opened by water. The diammonium phosphate is dissolved in water for a long time, but it can be opened. In addition, the diammonium phosphate can be burned by fire. .
Third, look at the price saying: "cheap and no good goods." The price of fake degraded fertilizer is generally lower than the price of similar high-quality fertilizer on the market.
Fourth, look at the varieties of fake deterioration of fertilizers generally with compound fertilizer, general calcium phosphate, calcium magnesium phosphate fertilizer and liquid fertilizer, foliar fertilizer, etc., in the purchase of such fertilizers, pay special attention. Fertilizers such as ammonium bicarbonate rarely produce fakes on the market.
The last thing to be reminded is: First, try to select some reputable fertilizer distribution units to purchase fertilizers when purchasing, select some well-known brands or fertilizers that have been used and have good effects, and do not buy business units without business qualifications or licenses. Small traders' fertilizers. Second, when purchasing fertilizer, you must leave a receipt and relevant ticket, so that you can make a voucher claim when there is a problem.
Source: Linfen City Soil and Fertility Station, Yunnan Province
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