In the current market, there are many types of liquid fertilizers. How to identify the quality is mainly from several aspects: one look, two, three, and four.
Look at the physical state. Good liquid fertilizer products are clear and transparent, clean and free of impurities, and there may be many solid insolubles in poor quality products.
Said the quality of the product. The heavier the liquid product of the same volume, the greater the specific gravity. Therefore, the specific gravity is an important indicator to measure the quality of liquid fertilizer products. Good products do not necessarily have a large proportion, but the positive content of small proportion is not sufficient.
Smell the smell of the product. Good products have no smell. There is a strong ammonia smell, the pH is not well mastered, a special fragrance is generally used to cover certain odors, and a pungent odor is generally added to the substance that should not be added.
Freeze test stability. Good products are placed in the refrigerator for 24 hours and will not crystallize. If the layer is crystallized, there is no choice of raw materials in the production process and no control of the production process.
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