How to identify the quality of chemical fertilizers? How to identify fertilizer quality

One look: the high-quality compound fertilizer particles are consistent, no large hard lumps, and less powder. Small red potash granules, or white urea granules may be seen. Compound fertilizer with high nitrogen content can be stored for a period of time, and many attached white fine crystals can be seen on the surface of the fertilizer grains; Inferior compound fertilizers do not have these phenomena.

Second rubbing: rub the compound fertilizer by hand, leaving a layer of gray powder on the hand, and the sticky feeling is the high-quality compound fertilizer. Breaking its particles, you can see that the fine white crystals are also of high quality. Inferior compound fertilizer is mostly gray-black powder, no stickiness, and no white crystals in the particles.

Three burning: take a little compound fertilizer and put it on the iron sheet and burn it on an open flame, there is an ammonia smell indicating nitrogen, and a purple flame indicates potassium. The stronger the ammonia smell and the longer the purple flame is the high-quality compound fertilizer. On the contrary, it is inferior quality.

Four dissolving: high-quality compound fertilizer will dissolve in water, even if there is a small amount of precipitation, it is relatively small. Inferior compound fertilizer is rough and hard, and difficult to dissolve in water.

Five smells: compound fertilizers generally have no peculiar smell (except for organic and inorganic compound fertilizers), if they have peculiar smells, it means that they contain ammonium bicarbonate or toxic substances trichloroacetaldehyde (acid), etc.

To tell the truth, the brother in front of me said to see, touch, smell, burn, and wet can only be seen simply The effect is not very ideal, to put it bluntly, there is no effect, the real effect has to be tested by the Industrial and Commercial Bureau After selling for so many years, I still don't have a way to see whether it is true or false There are too many small factories now.

How to identify the quality of chemical fertilizers.

Summary. 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.

How to identify the quality of chemical fertilizers?

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 form.

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 fertilizer is relatively thorough 5, hygroscopicity, and the hygroscopicity of good fertilizer is weak 6, and the burning identification.

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

Just out of the factory, they are all good fertilizers, and when they are old, they are soil.

Let's look at the other aspects.

Its quality can be judged by "one look, two touches, and three blisters."

One look: look at the appearance color of organic fertilizer. The organic fertilizer dried by the physical method still retains the original color of the manure, but the water content is reduced, and the organic fertilizer treated by the composting technology becomes brown or black-brown after decomposing. There are no other impurities in the finished product.

Two touch: grab a good organic fertilizer with your hands, feel the same, soft and elastic when wet, brittle and easy to break when dry, poor quality organic fertilizer can touch impurities with your hands, especially sand.

Three blisters: Take two cups of water, put some good and low-quality organic fertilizer into it, and you can distinguish the authenticity in a few minutes. Organic fertilizer adulteration is usually done by adding sand or soil to add weight. Good organic fertilizer is evenly distributed in water, while the bottom of the cup of poor organic fertilizer sinks into a lot of sand or soil.

Real fertilizer products will have clear packaging labels, including the name of the manufacturer, product name, quality standards, ingredients, usage and dosage, etc., if there is no label-related information, it can be inferred that it is a fake. 2.Check the ingredients of the product:

Fakes sometimes add some harmful repentance substances, so we can distinguish the real from the fake by identifying the ingredients. 3.Find out about the manufacturer:

When buying fertilizers, you can learn more about the manufacturer's brand image, product reputation, company qualifications, etc., so as to judge whether its products are genuine. 4.Try it:

You can try to use it in small quantities to observe the effect after use, so as to judge whether it is **. Old foresails.