What are the potash fertilizers? What are the characteristics?

What are the potash fertilizers? What are the characteristics and how to identify the true and false? Also ask experienced netizens to help introduce the varieties of potash fertilizer commonly seen in the market, such as simple potash fertilizer, potassium sulfate, potassium silicate and so on. The following farming network lists its characteristics and identification methods in detail for netizens' reference. 1. Common types of potash fertilizer: 1. Potassium chloride: divided by origin, there are red and white types; the shape is divided into block, powder and irregular granules; potassium oxide content (expressed as K20%) is generally 60% imported and 57% or 60% domestic. 2. Potassium sulfate: generally white crystalline particles or powder. Some products are slightly variegated because of the impurity. Domestic potassium sulfate includes Lop Nur or Taiwan, generally containing 50% of K2O and 54% of German production. 3. Potassium silicate: mainly in the form of dark gray powder, it is an industrial by-product, and the content can be confirmed only through laboratory tests. Generally, K2O is 10%-14%, which is alkaline. 2. Potassium compound fertilizer. The market is mainly ternary compound fertilizer. Second, the identification method of potash fertilizer: method 1. Iron sheet burning method: put a little fertilizer particles (large or small) on the red-hot iron sheet to burn, and those who do not melt, odorless, or jump when heated can be roughly defined as potash fertilizer. If the iron sheet is tilted and the fat particles are directly burned by high temperature, there will be a colored flame, the golden shining flame is sodium, and the light yellow with lavender flame is potassium. Potash fertilizer also has a kind of powder, the color can be brick red, light red or white, its identification method is also burning on the iron sheet, potash fertilizer is non-melting, no odor, while phosphate fertilizer is light gray, although it is not melted, but it has a smell. Add: if the fertilizer particles on the iron sheet are melted by high temperature and there is thick smoke, those with ammonia odor are ammonium nitrogen fertilizer, and those without ammonia smell may be nitrate; if the fertilizer particles on the iron sheet do not melt and do not beat, and those who smell sour or bone smell, it may be phosphate fertilizer. Method 2. Potash solution combustion method: dip the saturated potash solution on the iron wire ring, burn on the high temperature flame, and observe the flame color, but it is difficult to distinguish the flame color between potassium and sodium. However, if inferior potash fertilizers other than conventional ones are encountered in the market, such as the small blocks or powdered forms of unrefined potash feldspar, the content of soluble potassium can only be determined by means of laboratory tests. Only rely on the combustion method can only be qualitative, not quantitative, that is to say, can only distinguish between true and false, can not be superior or inferior. What is nitrogen fertilizer? The method of self-made potash with plant ash