The compound fertilizer has full nutrients and is highly targeted. It is a granular fertilizer made by mixing nitrogen, phosphorus and potassium fertilizers in a certain proportion. It is easy to use and has high fertilizer efficiency and is popular among farmers. In recent years, some unscrupulous manufacturers have produced and sold a large number of counterfeit compound fertilizers into the market, and farmers' friends are extremely easy to be fooled. To this end, we introduce several simple methods to identify the advantages and disadvantages of compound fertilizers:
First look: first look at the fertilizer is double-layer packaging, then look at the outer packaging bag marked with the trademark, production license number, agricultural use registration certificate number, standard code, total nutrient content, the name and address of the production enterprise, and finally look at the inner packaging Whether there is a product certificate in the bag, if the above logo is not complete, it may be a fake product. Look at the fertilizer particles in the bag is consistent, no large lumps, less powder. If used with Canadian potash, red fine potassium fertilizer particles can be seen. A compound fertilizer with a high nitrogen content, which can be stored for a period of time, with many white or colorless fine crystals attached to the surface of the fertilizer. This crystal is formed by the moisture absorption of urea and potassium chloride, and the inferior compound fertilizer does not have this phenomenon.
Second touch: The national standard stipulates that the moisture content of the three-element low-concentration compound fertilizer should be less than or equal to 5%. If it exceeds this index, it will feel sticky in the hand and can be pinched into a cake. Grab the compound with half a hand, leave a layer of grayish white powder on the hand and have a good feeling of adhesion. If the particles are touched, the fine white crystals are also shown to be of high quality. The inferior compound fertilizer is mostly gray-black powder, has no sticky feeling, and has no white crystals in the particles.
Three-burning: Take a small amount of compound fertilizer on the iron, and put it on the open flame to burn. There is ammonia smell indicating nitrogen, and a yellow flame indicates potassium. And the more ammonia smell, the yellower the yellow flame, indicating that the higher the nitrogen and potassium content, the better the compound fertilizer. On the contrary, it is a poor quality compound fertilizer.
Four smells: Compound fertilizers generally have no odor (except organic and inorganic compound fertilizers). If there is odor, it is because the basic raw material nitrogen fertilizer mainly uses agricultural ammonium carbonate, or the basic raw material phosphate fertilizer contains toxic substance trichloroacetaldehyde (acid ). When trichloroacetaldehyde (acid) enters the farmland, it will cause burning of the seedlings, but the crops will not be harvested, and the toxic residue period will be long, which will affect the growth of the next season crop. Therefore, it is best for farmers' friends not to buy compound fertilizers with odors.
Five solvents: high-quality compound fertilizer has good water solubility, most of which can be dissolved in water, even if there is a small amount of sediment, it is fine. The inferior compound fertilizer is hardly soluble in water, and the residue is rough and hard.
Six tastes: Because the market is relatively lack of potash, the price is higher, and some unscrupulous manufacturers use red bricks to smash and act as potash. At the time of purchase, the farmer friend can taste the red granules in a small amount, the potassium chloride is salty, and the red brick granules are not salty.
First look: first look at the fertilizer is double-layer packaging, then look at the outer packaging bag marked with the trademark, production license number, agricultural use registration certificate number, standard code, total nutrient content, the name and address of the production enterprise, and finally look at the inner packaging Whether there is a product certificate in the bag, if the above logo is not complete, it may be a fake product. Look at the fertilizer particles in the bag is consistent, no large lumps, less powder. If used with Canadian potash, red fine potassium fertilizer particles can be seen. A compound fertilizer with a high nitrogen content, which can be stored for a period of time, with many white or colorless fine crystals attached to the surface of the fertilizer. This crystal is formed by the moisture absorption of urea and potassium chloride, and the inferior compound fertilizer does not have this phenomenon.
Second touch: The national standard stipulates that the moisture content of the three-element low-concentration compound fertilizer should be less than or equal to 5%. If it exceeds this index, it will feel sticky in the hand and can be pinched into a cake. Grab the compound with half a hand, leave a layer of grayish white powder on the hand and have a good feeling of adhesion. If the particles are touched, the fine white crystals are also shown to be of high quality. The inferior compound fertilizer is mostly gray-black powder, has no sticky feeling, and has no white crystals in the particles.
Three-burning: Take a small amount of compound fertilizer on the iron, and put it on the open flame to burn. There is ammonia smell indicating nitrogen, and a yellow flame indicates potassium. And the more ammonia smell, the yellower the yellow flame, indicating that the higher the nitrogen and potassium content, the better the compound fertilizer. On the contrary, it is a poor quality compound fertilizer.
Four smells: Compound fertilizers generally have no odor (except organic and inorganic compound fertilizers). If there is odor, it is because the basic raw material nitrogen fertilizer mainly uses agricultural ammonium carbonate, or the basic raw material phosphate fertilizer contains toxic substance trichloroacetaldehyde (acid ). When trichloroacetaldehyde (acid) enters the farmland, it will cause burning of the seedlings, but the crops will not be harvested, and the toxic residue period will be long, which will affect the growth of the next season crop. Therefore, it is best for farmers' friends not to buy compound fertilizers with odors.
Five solvents: high-quality compound fertilizer has good water solubility, most of which can be dissolved in water, even if there is a small amount of sediment, it is fine. The inferior compound fertilizer is hardly soluble in water, and the residue is rough and hard.
Six tastes: Because the market is relatively lack of potash, the price is higher, and some unscrupulous manufacturers use red bricks to smash and act as potash. At the time of purchase, the farmer friend can taste the red granules in a small amount, the potassium chloride is salty, and the red brick granules are not salty.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Slot Diffusers,Slot Air Diffuser,Slot Diffuser Grill,Ceiling Slot Diffuser
Guangzhou Jointair Co., Ltd. , https://www.nbjointair.com