Current, a few illegal businessmen on the fertilizer market sales JiaLie fertilizer by setting the "trap", make black-money, let farmers suffer losses, and crops to "eat" JiaLie "food", cut, rejection, spoofing farmers often watched crop harvest.
So, the farmer friends when buying fertilizer, how to avoid the "trap", become widespread attention topic, therefore, small make up to sort out a few simple method correct choose and buy the fertilizer, to guide you.
Buy through formal channels
When buying fertilizer, please try to buy the large agricultural market, fertilizer station, etc.
Do not listen to the "instructor" or "expert", do not buy from the individual or other informal sales outlets, avoid the small and cheap.
In case of the "cheat group", should timely report to local agricultural law enforcement authorities, lest other farmers be cheated.
Accurately identify fertilizer packaging
According to the content and requirements of fertilizer identification (gb18382-2001), the packaging logo should include:
Name and trademark of fertilizer in Chinese;
Fertilizer specifications, grade and net content;
Nutrient content;
Contents of other additives;
Production license number and fertilizer registration certificate number;
Product execution standard;
The name, address and telephone number of the producer;
Warning notes and so on.
At the same time, the packing should be accompanied by product instructions, and the products should be marked with date and expiry date.
Observe the shape and color of the fertilizer
Nitrogen fertilizer: mostly crystalline, white, with some brownish or light blue;
Phosphatic fertilizer: non - crystal of lump or powder, brownish gray or brown;
Potash: mostly crystalline, with white or red;
The shape of compound fertilizer is average, smooth surface, not easy to absorb moisture and block, color uniformity, no obvious color difference;
Diammonium phosphate: the granule hardness is large, with obvious grease gloss, the color varies from yellowish to dark grey and dark brown.
Mixed fertilizer (BB fertilizer) : the shape is more granular, also some are stripe or flake, the color is gray, gray, mixed color, color and so on;
Potassium dihydrogen phosphate is the white crystal.
Sample of cautery fertilizer
A few fertilizer samples can be burned by fire, and can be identified from the color of flame, burning conditions, smoke flavor and residue, etc.
Ammonium bicarbonate can be decomposed directly with fire and produces large amounts of white smoke without residue, with strong ammonia stink.
Ammonium chloride can be decomposed or sublimated directly into a large amount of white smoke without residue, with strong ammonia and acidity.
The urea fire quickly melts down and runs white smoke, and the white smoke is attached to the white smoke with a white crystal.
Calcium superphosphate, calcium magnesium phosphate, phosphate powder and so on do not change on red charcoal, bone powder will immediately become black, and emit the smell of burnt.
Potassium sulfate, potassium chloride and potassium sulfate have no significant change in red charcoal, and do not melt but have "crackle" sound.
When the formula fertilizer (mixed with mixed fertilizer) is burning, some can give off irritant ammonia flavor, the formula fertilizer that contains potassium element sends out characteristic purple flame.
Touch fertilizer sample
For chemical fertilizer products, the hands can be used for a few times, after kneading to be broken or powder, indicating that its water content is high, the hardness index is not qualified.
High quality chemical fertilizer feel good, have the oil feeling to be the genuine article.
Urea: the grain size is consistent, it is not easy to lump, the liquid is strong, so the hand feeling is better, and the fake urea hand touch has the burning sensation and the feeling of feeling.
High quality potash: less moisture absorption, not easy to agglomerate, easy to moisture absorption caking mostly JiaLie products, storage for a long time or improper storage also can appear agglomeration phenomenon, the longer the agglomerate harder, just caked with the hand a pinch to break open.
Calcium superphosphate: heavy, but not frivolous.
If the obvious impurities such as soil, stones and cinder are found in calcium superphosphate, it is a fake product.
If the acid is too strong, water is more, it is unripe unqualified, non - finished superphosphate.
In addition, there are illegal merchants to use phosphogypsum, waste cement residue to pass off as superphosphate.
Phosphogypsum is light and dry and dry.
The waste cement slag is heavier than superphosphate, and the hand is not greasy, not dry, not dry, and has solid cement.
Dissolve fertilizer samples with water
Urea, ammonium bicarbonate, ammonium chloride, ammonium sulfate, calcium nitrate, calcium nitrate, etc., are all soluble in water.
High quality compound fertilizer is water-soluble, the water will be dispersed, dissolved or have a few residues, and poor quality compound fertilizer is very poor solubility or not soluble at all.
Slow release of fertilizer because special coating is not easy to dissolve, but after the fertilizer envelope is broken, the fertilizer in it is easy to dissolve.
