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, four freezes, no test.
1 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. 2 called the product quality. 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. 3 smell 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. 4 freezing 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.
1 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. 2 called the product quality. 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. 3 smell 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. 4 freezing 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.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Hand Cutter Tools,Cutting Hand Tools ,Wood Cutting Tools,Sheet Metal Hand Tools
Ebic Tools Limited , http://www.ebictools.com