How to distinguish the quality of compound fertilizer?

How to distinguish the quality of compound fertilizer? Please introduce the discrimination method to distinguish the quality of compound fertilizer, please refer to the following methods: look at the standard outer packaging of the products of the formal manufacturers of outer packaging. printed with product name, trademark, national standard, production license number, general compound fertilizer ratio of nitrogen, phosphorus and potassium, total nutrient content, net weight, manufacturer, factory address and contact number and so on. The bag marked "S" is potassium sulfate as potassium source, and potassium chloride is not marked or marked "Cl" as potassium source. You should choose to buy according to the planting crops. However, the packaging quality of compound fertilizer produced by some irregular manufacturers is poor, and the printed items are not complete and non-standard. Look at the appearance of fertilizer regular manufacturers produce products with uniform particles, consistent color, no caking phenomenon, and good water solubility. Generally speaking, the dissolution of compound fertilizer with ammonium carbonate as nitrogen source is faster than that with urea as nitrogen source, and the dissolution of columnar extrusion granulation is faster than that of spherical one. Such as bag compound fertilizer caking, if the urea is used as the nitrogen source, and the block is broken as soon as it is broken, the quality is no problem, and the fertilizer effect will not be affected after application, otherwise the fertilizer efficiency is not good. There are many varieties of compound fertilizer in the fertilizer nutrient content market, some are in the nutrient content, some are in the different proportion of nitrogen, phosphorus and potassium at the same nutrient content level. When buying fertilizer, you only look at the price, not the content, and it is unscientific to buy which one is low. A bag of fertilizer is not necessarily cost-effective. You must see clearly the content of the total nutrients in the fertilizer in order to determine which fertilizer to buy. Click to get more compound fertilizer application techniques