How to determine the quality of fertilizer, how to choose fertilizer,

The quality of fertilizer sometimes needs to be tested or the manufacturer!

Nowadays, many will use 30% to charge 45% content.

Selling at a low price can also make a lot of profits!

It is judged according to the implementation standard of each fertilizer.

1. Improve soil and fertilize soil fertility. After organic fertilizer is applied to the soil, organic matter can effectively improve the physical and chemical status and biological characteristics of the soil, mature the soil, enhance the fertilizer retention capacity and buffer capacity of the soil, and create good soil conditions for the growth of crops.

2. Increase output and improve quality. Organic fertilizers are rich in organic matter and various nutrients that provide nutrients to crops. After the organic fertilizer is decomposed, it provides energy and nutrients for soil microbial activities, promotes microbial activities, accelerates the decomposition of organic matter, and produces active substances that can promote the growth of crops and improve the quality of agricultural products.

3. Improve the utilization rate of fertilizer. Organic fertilizer contains more nutrients but relatively low content and is released slowly, while chemical fertilizer has high nutrient content per unit and few components and is released quickly. The organic acids produced by the decomposition of organic matter can also promote the dissolution of mineral nutrients in soil and chemical fertilizers.

Organic fertilizer and chemical fertilizer promote each other, which is conducive to crop absorption and improves the utilization rate of fertilizer.

The above is a brief analysis of organic fertilizer, I hope to help you in the purchase of organic fertilizer.

1. Distinguishing the name of the package: the actual name of the fertilizer should be placed in the most conspicuous place, and the company can not name the fertilizer to confuse the farmers, so it is necessary to see it clearly.

2. Weighing method: counterfeit and shoddy products will often appear inconsistent with the information on the bag, so the actual weight is inconsistent with the weight marked on the bag, for example, the 50kg printed on the bag is actually only 40kg, which is fake.

3. Content: The information signs of counterfeit and shoddy packaging bags are often unclear, and the most basic content is not clearly written, and consumers are not told what kind of fertilizer they are packing.

4. Sealing: In order to ensure that the fertilizer is not easy to leak during transportation and is not easy to deteriorate in storage, the inner and outer packaging are subject to special processing procedures and strict sealing.

Don't look at the manufacturer's factory test sheet, but the actual inspection index is higher than the national industry standard.

How to judge the quality of chemical fertilizers:

See: fertilizer particles have good luster and bright color, and gray and dull are inferior.

Hand rubbing: put chemical fertilizer in the palm of the hand, relatively twist and rub twice, rubbing is not broken, rubbing is inferior, the harder the fertilizer, the better.

Water solubility: take a small amount of nitrogen fertilizer and potassium fertilizer and stir in water for 5 minutes, it is better to be completely dissolved, and it is inferior if it is not completely dissolved. Diammonium phosphate can be dissolved with water, but the dissolution time is longer.

Potash fertilizer: there are white, red, pink, red potash fertilizer is generally imported potash fertilizer, the best quality. Potash can be tasted with the tongue, and the spicy taste is superior, and the spicy taste is inferior.

Fertilizers whose quality characteristics seriously do not meet the safety indicators or seriously do not meet the corresponding standards or labels are called inferior fertilizers.

Simpler, you can judge it by feel, grasp it in your hand, feel soft, it may be better, harder, it won't be too good.

1. Look at the packaging. Three certificates: production license, business license, product quality certificate; Identification of the content of the three major elements; Product name, nutrient content, grade, trademark, net weight, factory name, factory address, standard, etc.

2. Look at the color and shape. Look at the surface of the particles. The surface of a good fertilizer is smooth, the color is pure, the particle size and specific gravity are uniform, grab a handful and hold it several times, and the "general oil and wet feeling" is **.

3. Smell. The smell is generally strong.

4. Solubility. The solubility of good fertilizers is relatively thorough.

5. Hygroscopicity, good fertilizer has weak hygroscopicity.

6. Burning identification. If it doesn't burn and doesn't smell, it's a problem.

1. Take a look and look at the physical state of the product. Good liquid fertilizer products are clear and transparent, clean and free of impurities, while black solutions such as amino acids and humic acid of suspended fertilizer are opaque, but if you look closely, there is no precipitation at the bottom of the bottle after the product is inverted, and there may be a lot of solid insoluble matter in the bottle of poor quality products. 2. The second weighs weigh the product.

According to industry standards, each product has a minimum nutrient content requirements, each nutrient element in liquid fertilizer is in g l units, which means the quality of nutrients contained in a unit volume, the larger the value, the heavier the same volume of liquid product, the greater its specific gravity. Therefore, the specific gravity is an important indicator to measure the quality of liquid fertilizer products, and good products do not necessarily have a large proportion, but the specific gravity is not sufficient. The proportion of qualified amino acids, humic acid and organic water-soluble fertilizer liquid fertilizer is generally above, that is, the weight of 1 liter of liquid fertilizer is more than kilograms, and the proportion of large, medium and trace element liquid fertilizer is above it.

3. Smell three times, smell the smell of the product. Good products do not have a noticeable odor, and some products have a slight ammonia smell under weak acid or weak alkaline conditions. There is a strong smell of ammonia is that the pH is not well mastered, there is a special fragrance is generally to cover some smells, and there is a pungent smell is generally caused by adding substances that should not be added.

4. Fourth, freeze, Zuna to check the stability of the product. Solid precipitation in liquid fertilizer solution is generally divided into two situations, one is to precipitate slowly for a long time, the other is to precipitate at low temperature and solubility reduction, freezing is to test the stability of the product under low temperature conditions, good products are placed in the refrigerator for 24 hours without stratified crystallization, and those stratified crystallized products are caused by not selecting good raw materials and controlling the production process. If netizens also want to choose water-soluble fertilizers, they can choose according to the above methods.

Good fertilizer can make crops better absorb nutrients, provide more elements, and be more conducive to the growth and development of plants; Poor quality fertilizers can lead to insufficient nutrient absorption by crops, reduce crop yields, and may also lead to crop diseases.

If a good fertilizer is a solid fertilizer, it is uniform in particles, uniform in color, and almost no impurities. Inferior fertilizers can vary in size and mixed with many other debris.

Impurities: First observe whether the fertilizer has impurities, if the fertilizer is of good quality, there are generally no impurities, and the inferior fertilizer has magazines.

Color: Then observe the color of the fertilizer, if the color is uniform and uniform, it means that it is a good quality fertilizer, if the color is very uneven, and there are many colors, it means that it is an inferior fertilizer.