Water-soluble fertilizer is a kind of multiple compound fertilizer that can be completely dissolved in water. It is not only easier to be absorbed by crops, but also its absorption and utilization is relatively high. It is more important to synchronize fertilizer application and irrigation (spray irrigation) together. It is often said that the integration of water and fertilizer reduces the amount of labor and becomes the top dressing fertilizer for vegetables, flowers, fruit trees and other crops. At present, the phenomenon of substandard filling and poor filling in the market of water-soluble fertilizers cannot be eliminated for a time. Buy water soluble fertilizer should pay attention to the following matters: A look at the contents of nutrients of a large number of elements and trace elements on the bags. According to the macronutrient water-soluble fertilizer standard, the single nutrient content of nitrogen, phosphorus and potassium can not be less than 4%, and the sum of the three can not be less than 50%. If you see on the packaging bag that one element of a large number of elements is less than 4%, or the sum of the three elements is less than 50%, it means that such products are unqualified. The content of trace elements refers to the sum of the contents of copper, iron, manganese, zinc, boron, and molybdenum. The product should contain at least one trace element, and trace elements with a content of not less than 0.05% should be included in the trace element content. Second, look at the various nutrient labels on the bags. The high-quality and large-scale water-soluble fertilizers are very clearly marked on the guaranteed components (including macronutrients and trace elements), and they are all marked on a single scale with clear nutrient content. The nutrient content of informal manufacturers will generally appear as the sum of the contents of several elements >hundred percent. If so marked, the product is not regular. Look at the product recipe and register crops. A large number of elements of water-soluble fertilizer is a formula fertilizer, high-quality water-soluble fertilizers generally have several formulas, from the seedling stage to harvest can find a suitable formula to use. If the package clearly indicates that it is a special fertilizer for a certain crop, one or two recipes will hit the market. Such practices are not formal. The regular fertilizer registration crop is one or a few crops, and for the non-registration crops, there is a need for local use experience. Fourth, see whether there are product implementation standards, product generic name and fertilizer registration certificate number. Generally speaking, all-water-soluble fertilizer, in fact, its product common name is a large number of elements in water-soluble fertilizer, the general implementation of the standard is NY1107-2010, if the package does not appear in this standard, that is not fully water-soluble fertilizer. Many of the all-water-soluble fertilizers marked on the packaging begin with GB, indicating that such products are unqualified. In addition, it depends on whether there is a fertilizer registration certificate number. If there is any doubt about the product, you can check the fertilizer registration number on the Internet, qualified large quantities of water-soluble fertilizer, and the fertilizer registration number and manufacturer can find it. No, it means the product is not qualified. Five to see whether there are security signs. Normally full-water-soluble fertilizers produced by regular manufacturers have anti-counterfeiting labels on the packaging bags. It is an "identification card" for fertilizers. The anti-counterfeiting labels on each package of fertilizer are not the same. After scraping, you can enter numbers online or on the phone. After that, we can tell if the fertilizer is true or not. Whether there is any anti-counterfeiting mark on the packaging bag is an important indicator to determine the quality of fertilizer. Many unqualified products generally do not have anti-counterfeiting labels. Sixth, see if the bag is marked with heavy metal content. The heavy metal ion content of a large number of water soluble fertilizers produced by regular manufacturers is lower than the national standard, and there are obvious labels. If the fertilizer bag is not marked with heavy metal content, please use it with caution. Seven to see dissolved. Dissolving the fertilizer in water is the most important method of distinguishing the quality of water-soluble fertilizers. High-quality all-water-soluble fertilizer dissolves quickly in water, the solution is clear and there are no residues and sediments. If the fertilizer is not completely dissolved in the water, there is residue, indicating that the fertilizer quality is not very good. Eight look appearance. The water soluble fertilizer products with good quality are uniform and crystalline. If you see different particle sizes, especially similar to compound fertilizer particles, it is best not to buy. Black Flex Tape,Asphalt Repair Tape,Black Flex Seal Tape,Waterproof Bitumen Tape Kunshan Jieyudeng Intelligent Technology Co., Ltd. , https://www.jerrytapes.com