True and false compound fertilizer
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(1) Burning - The compound fertilizer particles are heated or burned, and the fertilizer is identified from the color of the flame, the melting condition, the smell of the smoke, the residue, and the like.
When high-quality compound fertilizer is burned, there will be three phenomena. First, it will bubble. This is mainly the effect of nitrogen fertilizer. Secondly, it will burn very vigorously. This is mainly because the phosphate fertilizer is burning. Again, there is a light blue flame in the upper part of the flame. Mainly due to the burning of potassium. The high-quality compound fertilizer is very complete and has no residue.
(2) Dissolution - The compound fertilizer granules are dissolved in water to distinguish them. Put the compound fertilizer granules in a small amount of water. After a period of time, judge according to the dissolution of the fertilizer. The compound fertilizer particles will diverge, dissolve or have a little residue. After shaking, the solution is transparent, stable, and has almost no residue. The counterfeit compound fertilizer has poor solubility or does not dissolve at all.
(3) Look - first, look at the compound fertilizer packaging. The compound fertilizer produced by the regular manufacturer has its outer packaging specification and firmness. For example, the “Yangyangtian†series compound fertilizer has trademarks, product names, nutrient content (grade), net weight, factory name, factory address, telephone number, national free service telephone number, etc. The packaging of counterfeit and shoddy compound fertilizers is generally rough, and the information on the packaging bags is unclear, the quality is poor, and it is easy to break.
Next, look at the particle size (or crystalline state) of the compound fertilizer. The high-quality compound fertilizer has uniform particle size and specific gravity, smooth surface, and is not easy to absorb moisture and agglomerate. On the contrary, the fertilizer particles are uneven in size, rough, humid, and easy to agglomerate.
Again, look at the color of the fertilizer. The quality of the high-quality compound fertilizer is very uniform, there is no obvious color difference, for example, the yellow compound fertilizer particles, the yellowness is between 6-9, and the whole particles are uniform from the inside to the outside. The fake compound fertilizer is very light in color and most of it is painted on the surface.
(4) Touching - Put the fertilizer in the palm of your hand, hold it firmly or press it to turn it, and judge the fertilizer according to the hand feeling. Grab a handful of fertilizer and hold it several times. If it is a "oily wet" feeling, it is genuine; if it is a farmer friend with Chinese liquid on hand, after holding it hard, there is obviously dissolved compound fertilizer on the hand. If it is dry, it is likely to be impersonated with a flip-chip compound fertilizer.
Author: Ben Wang Zhao Zhuanjun Contributor Network