"Four Looks" Cleverly Identifying High Quality Water Soluble

In a chaotic market, how can farmers identify the authenticity and buy quality water-soluble fertilizers? On this issue, experts from the field of water-soluble fertilizers and associate professor Zhang Chenglin from South China Agricultural University introduced that the following four preliminary identifications of water-based fertilizers can be identified:

A look at the water solubility of the product. Really qualified liquid water-soluble fertilizers generally do not appear obvious stratification and sedimentation; for solid water-soluble fertilizers, it is advisable that a small amount of samples be dissolved in water, and residues are generally counterfeit products.

Second, look at the proportion. All water-soluble fertilizer products that meet the national registration criteria have added a large number of elements, trace elements, or organic substances and other nutrients, so that the density of water-soluble fertilizer products is necessarily greater than water, and according to Zhang Chenglin's research experience, the real good water-soluble fertilizer Product density is 1.3 kg/l. In other words, 100 ml of liquid water soluble fertilizer should weigh about 130 grams.

Third, look at the registration number. The Ministry of Agriculture expressly stipulates that all fertilizer products must be subject to a factory-certificate and permit escrow certificates are not allowed. However, many manufacturers that do not have production strength are producing without permission, without factory buildings, technology, equipment, and fertilizer registration certificates, and they compile fertilizer registration certificates to confuse people. Therefore, the purchaser can log on the website of the National Fertilizer Quality Supervision and Inspection Center (Beijing) and enter the registration number to check the authenticity. If you do not find the product registration number on this website, you must be careful about your purchase.

Four look at the packaging instructions. Many manufacturers exaggerate the use of products for profit, and carry out false propaganda on bags or bottles. Foliar fertilizers are unlikely to have such quick effects as chemical pesticides, so it is impossible for them to be sprayed immediately. Foliar fertilizers that truly meet or exceed national standards are valued for long-term results. Therefore, when you see the packaging instructions blown up and out of bounds, it may be a counterfeit product and you should purchase it with caution.

In addition, there are people in the industry who have proposed a price comparison method. They said that although the current price system in the agricultural materials market is very confusing and the high-priced products are not necessarily good products, due to the cost of production, the prices of water-soluble fertilizers are very low and the prices are very low. The possibility is very large. For example, if the retail price is around RMB 1 for a product over 20 grams on the market, it is generally ammonia plus hormones or urea plus hormones. Such products may cause the leaves of fruits and vegetables to turn green quickly but actually It may be counterproductive to increase production.

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