Due to its complete nutrition, targeted, easy to use, and high fertilizer efficiency, the compound fertilizer is welcomed by farmers. In recent years, some unscrupulous manufacturers have been making huge profits to produce large quantities of fake and inferior compound fertilizers, which has caused great losses to farmers and agricultural production. The pros and cons of compound fertilizers can be judged by simple identification methods. Commonly used judgment methods are: First, see if the fertilizer is double-packed, and whether the trademark is marked on the packaging, the production license number, the standard number, the total nutrient content, and the production The name and address of the company, whether there is product certification in the inner packaging bag, etc., such as the above logo is incomplete, or a large number of elements and trace elements in the nutrient content is not divided, may be inferior products. The second hand touched the semi-finished compound fertilizer with a hand and left a layer of white powder on the hand and had a good quality of stickiness. If the particles were touched, the fine white crystals were also shown as high-quality compound fertilizer. Three burning a small amount of compound fertilizer placed on the iron, burning on the open fire, there is ammonia smell that contains nitrogen, there is a yellow flame that contains potassium, and the more concentrated the ammonia odor, the yellower the yellow flame, indicating the content of nitrogen and potassium The higher is the quality compound fertilizer. Four smells of compound fertilizers generally have no odor (except for organic-inorganic compound fertilizers). If they have odor, they are inferior compound fertilizers. Five soluble high-quality compound fertilizer has good water solubility, and most of the soaked in water can be dissolved, even if there is a small amount of sediment, it is also smaller. The poor quality compound fertilizer is hardly soluble in water and the residue is rough and hard. In six trials, the potash fertilizer in the market is relatively lacking and the price is relatively high. Some illegal manufacturers act as potash fertilizers after being crushed with red bricks. Potassium chloride has a salty taste. You can take a small amount of compound fertilizer at the time of purchase. If there is no salty taste, it is a poor quality product.
Excerpted from China Agricultural Press>
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