How to choose water-soluble fertilizer?

How to choose water-soluble fertilizer? What is the main basis to choose water-soluble fertilizer? We also ask experienced netizens to help introduce that there are a large number of water-soluble fertilizers in the agricultural market, but when many farmers choose water-soluble fertilizers, they often do not know the pros and cons of water-soluble fertilizers. Unqualified water-soluble fertilizers are not only harmful to agricultural production, but also cause environmental pollution and even greater losses. Therefore, the farming network has sorted out the methods of selecting and purchasing water-soluble fertilizers, which are listed in detail below for netizens' reference. Method 1, the content of the logo to choose and buy: there are a lot of water-soluble fertilizer products, do not need to open the package, just from the logo can see whether it is a regular product. For example, a large number of element water-soluble fertilizers, one is to look at the content of a large number of elements and trace elements on the bag. According to the standard of water-soluble fertilizer for a large number of elements, the single nutrient content of nitrogen, phosphorus and potassium should not be less than 6%, and the sum of the three elements should not be less than 50%. If you see on the bag that one of the elements is marked less than 6%, or the sum of the three elements is less than 50%, it means that this kind of product is unqualified. The content of trace elements refers to the sum of the contents of copper, iron, manganese, zinc, boron and molybdenum, and the product should contain at least two trace elements with a content of 0.5% 3.0%. Method 2. Select and purchase the crops registered with the products: the registration of water-soluble fertilizers is carried out according to the experimental crops, which can be one or more crops, and the crops that are not registered should be purchased carefully, or use the previous experience for reference. Method 3, choose and purchase from the product certificate (product implementation standard, product general name and fertilizer registration certificate number): most water-soluble fertilizers implement the industry standard of the Ministry of Agriculture, that is, the beginning of NY; the general name is the above several; fertilizer registration certificate number, water-soluble fertilizer is registered in the Ministry of Agriculture, the registration certificate number is: agricultural fertilizer (*) Pro (quasi) character *. If farmers have doubts about their products, they can look up their fertilizer registration certificate number online. Method 4. Choose and buy from whether the product packaging is marked with heavy metal content: the heavy metal content of water-soluble fertilizer produced by regular manufacturers should be in line with the national standard and should be clearly marked. If the heavy metal content is not marked on the fertilizer bag, please use it with caution. Method 5. Choose from the solubility of fertilizer in water: the fertilizer can be dissolved with water. Qualified water-soluble fertilizers should be more than 95% soluble in water, the solution is clear and there is no residue or sediment, otherwise the fertilizer quality is not good. How to use a large number of element Water-soluble Fertilizer? what is a large number of element small soluble Fertilizer Click to get more Water-soluble Fertilizer Application techniques