There are six easy ways to identify the advantages and disadvantages of compound fertilizers:
one look. Look at whether the fertilizer is double-layered, whether the trademark is marked on the outer packaging, the production license number, the standard number, the total nutrient content, the name and address of the manufacturer, and whether the product packaging certificate is included in the inner bag. , or a large number of elements and trace elements in the nutrient content is not divided, there may be inferior products.
Second touch. A handful of semi-finished compound fertilizer was hand-pulled, leaving a layer of white powder on the hand and a sticky sensation indicating good quality. If the granules were touched, small white crystals were also seen as high-quality compound fertilizers.
Three burning. Take a small amount of compound fertilizer placed on the iron, with open fire, there is ammonia odor that contains nitrogen, yellow flame shows that contains potassium, and the more concentrated ammonia odor, the yellower the yellow flame, indicating that the higher the content of nitrogen, potassium, namely For high-quality compound fertilizer.
Four smells. Compound fertilizers generally have no odor (except organic-inorganic compound fertilizers). If they have odor, they are inferior compound fertilizers.
Five soluble. High-quality compound fertilizers have 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 small. The poor quality compound fertilizer is hardly soluble in water and the residue is rough and hard.
Six tastes. 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.
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