Take a look-look at the compound fertilizer packaging first. For the compound fertilizer produced by regular manufacturers, the outer packaging instructions, such as ""series compound fertilizer, are marked with trademark, national inspection-free mark (assessed by AQSIQ), three certificates (i.e. production license, fertilizer registration certificate and product certificate), product name, nutrient content (grade), net weight, factory name, address, contact telephone number and national free service telephone number, etc. The packaging of fake and shoddy compound fertilizer is generally rough, the information on the packaging bag is unclear, the quality is poor, and it is easy to leak, but don't trust advertisements and beautifully designed packaging.

Look at fertilizer particles again: the production of compound fertilizer has to go through a set of complicated procedures, with scientific technology, balanced nutrients, uniform color, no variegated color, uniform particle size, spherical shape, smooth and shiny surface, and is not easy to absorb moisture, loose and not caked; The fake and shoddy special compound fertilizer is made by physical method or general mixing because of its simple production process, impure color, many variegated colors and serious particle breakage. Many inferior compound fertilizers are uneven, rough, high in water content and easy to agglomerate.

Secondly, look at the nutrient content of fertilizer. There are many kinds of compound fertilizers in the market, some with different nutrient contents, some with the same nutrient content level and different proportions of nitrogen, phosphorus and potassium. It is unscientific to buy chemical fertilizer only by looking at the price, not the content, which price is low. A bag of fertilizer is not necessarily cost-effective. We must look at the total nutrient content in the fertilizer to decide which fertilizer to buy.

Note: 1 and "QS" quality and safety signs are composed of the abbreviation (QS) of English letters "quality and safety" and four Chinese characters "quality and safety". Their functions are mainly in two aspects: first, it shows that the production and processing enterprises of this product have obtained the production license; Second, the enterprise clearly stated that the product meets the basic requirements of quality and safety.

2. Product name: false and exaggerated words such as "high-efficiency XX", "king of XXX" and "zero element XX fertilizer" shall not be added;

3. Total nutrient content: It can only indicate the percentage content of nitrogen, phosphorus pentoxide and K2O in the total nutrient, and other elements or compounds should not be included in the total nutrient.

4. Chloride ion content: When the chloride ion content in compound fertilizer is greater than 3.0%, "chlorine" should be marked on the package.

5. Medium and trace elements: If medium and trace elements are added, the content of medium and trace elements (calculated by elemental elements) may be indicated, but it shall not be included in the total nutrient content.

6. Certificate of conformity, production date or batch number: each bag of fertilizer should have product certificate, production date or batch number.

7. Implementation standard: GB 15063-2009 standard should be marked on the packaging bag.

8. Producer and address: The name and address of the legally registered producer who can bear the product quality shall be marked on the main surface of the product package.

9. Registration certificate number: The registration certificate number must be printed on the main surface of the compound fertilizer packaging bag. A registration number indicates that the fertilizer has been tested and demonstrated in a large area by agricultural departments at or above the provincial level, and compound fertilizer without registration number code is not allowed to be sold.

The second touch-real compound fertilizer has good stability and high hardness.