How to distinguish the authenticity of fertilizer, how to check the authenticity of fertilizer

As the saying goes, "A person is wrong for a time, and a person is wrong for a year". Once the peasants buy and use fake and inferior chemical fertilizers, it will be difficult to make up for the losses caused, which will not only affect the enthusiasm of the peasants, but also damage the interests of the peasants. The following is a common method for identifying real and fake fertilizers:

First of all, look at the packaging of fertilizer, fertilizer packaging bags must indicate the product name, nutrient content (grade), trademark, net weight, standard code, factory name and address, contact **, production license number and fertilizer registration number, etc., such as the above signs are not or incomplete, the packaging is rough, may be counterfeit and shoddy compound fertilizer, special attention should be paid to the fertilizer with obvious traces of unsealing in the packaging bag, this phenomenon may be adulterated. Also, pay attention to the date of manufacture on the certificate of conformity inside the fertilizer bag. If the fertilizer is stored for too long, the total nutrients will be lost.

Second, look at the particle size (or crystalline state) of the fertilizer. High-quality fertilizer has uniform particle size and specific gravity, smooth surface, not easy to absorb moisture and agglomerate, while fake and inferior fertilizer is just the opposite, uneven particle size, rough surface, high humidity, and easy to agglomerate. Third, look at the color of the fertilizer.

The color of high-quality fertilizers is very uniform, there is no obvious color difference, and the whole particle is uniform from the inside to the outside. Most of the fake fertilizers are surface painted and easy to decolorize.

Grasp a handful of fertilizer with your hands and hold it hard several times, and the quality with a "wet" feeling is relatively reliable. And the dry ones are likely to be fake and inferior fertilizers.

Dissolve the fertilizer granules in a small amount of water, and after a period of time, it can be judged according to the dissolution of the fertilizer. The fertilizer particles will absorb water, swell, diverge, dissolve, and after **, the dissolution is stable and almost no residue. The solubility of fake and inferior fertilizers is contrary to the above situation, with poor dissolution and residue.

The burning method is one of the simple methods to judge the real and fake fertilizers and identify the concentration. Fertilizer particles are heated or burned to identify the advantages and disadvantages of fertilizer from melting, smoke, smoke smell and residues. When heated, the fertilizer will bubble, melt, smoke, and emit an ammonia smell, and the particles will become smaller, and the higher the concentration, the less residue will be.

High-quality high-concentration fertilizers burn completely and leave almost no residue. Conversely, those that do not burn or that do burn without ammonia smell are likely to be fake fertilizers.

2. When burned again, the fertilizer will burn on the iron plate to produce an ammonia smell. This indicates that the nitrogen is slowly melting and that the residue that has been burned for a period of time is a good fertilizer.

3. Then dissolve in water, put the fertilizer into the water bottle, add an appropriate amount of water, and shake vigorously. High-quality fertilizers are particularly soluble in water, most of which are soluble, and even small residues are particularly fine. The fertilizer is poor, it is difficult to dissolve in water, and the residue is rough and hard.

4. The general quality of the touch, texture and fertilizer is not difficult, and it is even difficult to be left and relatively hard. Inferior fertilizers are easy to grind, rich in powder, and especially abundant.

5. It smells like a chemical fertilizer, and its raw material is like a newly purchased plastic sheet, which needs to smell a pungent smell.

Check it: Check the production batch number and seal of the package. Urea of qualified quality is generally produced on the packaging bag with a clear batch number and a machine seal with stacked edges on the front and back. The production lot number on the fake urea packaging is unclear or absent, and most of them are hand-sealed with a single thread.

Second look: Urea of acceptable quality is a translucent white particle with a consistent size. If the surface color of the particles is too bright or dark, or there is obvious reflection, it may be mixed with impurities, so be careful to buy fake urea.

Three smells: Urea from regular manufacturers has no volatile odor under normal circumstances, and ammonia smell can only be produced after being damp and high-temperature. If the volatile smell is strong under normal circumstances, the urea contains impurities.

Four touches: real granular urea is the same size and is not easy to agglomerate, so it feels better, while fake urea has a burning and stinging feeling when touched.

Five burning: The urea produced by regular manufacturers is placed on the fiery charcoal (or on the red-hot iron sheet) and melts rapidly, emitting white smoke and ammonia smell. If the charcoal burns violently, glows brightly, and has a "snort" sound, or is not melted completely, it must be mixed with impurities.

Sixth: the difference between the urea produced by regular manufacturers and the actual weight is generally within 1%, and the urea produced by fake is very different from the standard weight.

(2) Shape and color identification method. Urea is white or light yellow in the form of granular, needle-like or prismatic crystals with no or little powder. Ammonium sulfate is white crystals except for by-products.

Ammonium chloride is white or yellowish crystals. Ammonium bicarbonate is white granular crystals, and there are also individual manufacturers that produce large granular flat spherical ammonium bicarbonate. Superphosphate is an off-white or light gray powder.

Heavy superphosphate is dark gray, off-white granules or powder. Potassium sulfate is a white crystal or powder. Potassium chloride is white or reddish particles.

3) Odor identification method. The liquid with a strong pungent ammonia smell is ammonia, the particles with a pronounced pungent ammonia smell are ammonium bicarbonate, and the fine powder with a sour smell is heavy superphosphate. If the superphosphate has a very pungent sour smell, it means that waste sulfuric acid is likely to be used in the production process and cannot be used.

Pour a little fertilizer into a glass of water and look closely. After a while, if the fertilizer melts completely it is true (good), if there is sediment it is false (bad). Have a good harvest!

Check it with Nong Cha and check the information.

2. Burn with fire: The chemical fertilizer is burned on the iron sheet with ammonia odor, indicating that it contains nitrogen and gradually melts, and the residue that burns for a while and is less is a high-quality chemical fertilizer.

3. Dissolve with water: Put the fertilizer into the water bottle, add an appropriate amount of water, and shake the water bottle vigorously. High-quality fertilizers are particularly water-soluble, most of them are soluble, and even a small amount of residue is very fine. Inferior fertilizers are not easily soluble in water, and the residue is rough and hard.

4. Touch by hand: Usually the texture of high-quality fertilizers is relatively hard, and there will be no slag, even if the slag is very little. And low-quality fertilizers are easy to crush, hands full of powder, and there are a lot of them.

1. Outer packaging identification method. It mainly depends on whether the production license, fertilizer registration certificate and product qualification certificate are complete and valid.

2. Simple visual inspection. The special compound fertilizer is extruded and granulated or disc granulated by a set of complex procedures, and the color is gray-white or light gray, with few variegated colors, and the granulation is uniform, or round or cylindrical. Most of the fake and inferior special compound fertilizers are not deeply processed, they are made of crude or general mixing, the color is not pure, and the granulation is uneven, and some are even not granulated, into flour.

Three-hand pinching sensory method. The real compound fertilizer is generally melted and cooled and granulated at high temperature, and then dried, with good stability, high hardness, and consistent hardness, and it is not easy to break or soft by hand. The hardness of fake and inferior compound fertilizer is poor, the hardness is inconsistent, and it is easy to form lumps by hand, or soft as mud.

4. Smell method. Pinch a pinch of compound fertilizer and smell it, if you find that there is an ammonia smell, it is a low-content compound fertilizer, or it is mixed with ammonium carbonate. If other peculiar smells are found, it may be a fake and inferior special compound fertilizer.

The total nutrient content of the real special compound fertilizer is more than 25, which generally has the advantages of stable composition, no decomposition or no melting, so there will be no peculiar smell and no ammonia smell.

How to quickly identify fake fertilizer?