At present, there are many products bearing the name of organic fertilizer in the fertilizer market. The price ranges from three to four hundred yuan per ton to three or four thousand yuan. The difference in quality is also very large. It is very difficult to correctly distinguish the quality of the product from the packaging, and it can not be taken at any time. Therefore, this will cause confusion to the farmers' understanding of organic fertilizer. Many farmers' friends think that organic fertilizers are not much different, and the price is cheap. Some agricultural producers who pay attention to the quality of agricultural products mistakenly believe that high-priced organic fertilizers are good quality organic fertilizers. These understandings are brought to the lawless. Come to take the opportunity. So, is there a simpler and more effective technique for discriminating organic fertilizer?
   First: Look.
   Observe the fertilizer packaging label and the production plant. The packaging label is complete. The organic fertilizer usually adopts the NY-525 standard. The total nutrient content of nitrogen, phosphorus and potassium should not be less than 5%, and the organic matter should not be less than 100. Forty-five, clearly marked with the manufacturer, address, and phone number. Organic fertilizers that meet this standard are qualified organic fertilizers.
   Observe the fertilizer, open the package and observe the fertilizer itself. Organic fertilizers are powdery, columnar, and granulated, but no matter what shape, if there are many impurities in the inside, it should be a product whose quality is not up to standard. In addition, the particles of true organic fertilizers will not be smooth, because of the factors caused by raw materials, it is difficult to achieve the rules of organic fertilizer granulation. At present, there is a granular organic fertilizer on the market, the granulation is relatively smooth, even more smooth than the compound fertilizer or urea granules. This kind of organic fertilizer is made by using industrial waste residue, and its nutrient composition is better than that. Organic fertilizers directly derived from animals and plants are much lower.
   Second, ask.
   It is mainly about the raw materials used in organic fertilizer. Generally speaking, the application of organic fertilizers such as soybean meal, bone meal, fish meal, tobacco, and amino acids is optimal according to a reasonable ratio; followed by animal manure; industrial waste Improper handling of organic fertilizers can lead to secondary pollution such as heavy metals exceeding standards.
   Third, smell.
   Grab a handful of organic fertilizer and use the nose to smell it. If there is an unpleasant smell such as odor, this organic fertilizer should be used with caution. Most will be either decomposed or not at all. The use of this kind of organic fertilizer may lead to burning of seedlings or pathogens, causing great harm to crops.
   Fourth, dissolve.
   Put a certain amount of water in any container, then grab a handful of organic fertilizer and put it in the container to see if the organic fertilizer is dissolved. The dissolution rate will usually become a paste within 10 minutes. After dissolving, it is observed that there are more impurities. If it is insoluble or dissolves slowly, and the impurities are more, it is a product that is not up to standard.
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