What hidden tricks lie in the relationship between the main ingredient content of compound fertilizer and its price?

Why do some cheap compound fertilizers take effect quickly, while some name-brand compound fertilizers have little effect? What impact does a change in the ratio of the main ingredient content of compound fertilizer have on crops? Between big factories and small factories, cheap and expensive, how exactly should you choose? Come and take a look at the ten common questions about compound fertilizer prices! Teach you how to choose compound fertilizer!

1. Are the contents of cheap and expensive ones the same?

No, they are not the same. Big-factory name brands have sufficient content, with every content level only higher and never lower, strictly implementing national standards. Many manufacturers are short by 3 to 15 content units, and each content unit is about 50 yuan per ton, so 5 units is 250 yuan, about 15 yuan per bag.

2. Many fertilizers are low in price, yet they also perform quite well after use. Why is that?

Most manufacturers now increase the nitrogen content, reduce the potassium content, or even omit it. For example: a 15-15-15 45% content product is made into a 20-10-5 35% content product. After use, the seedlings are uniform and strong, but fertilizer deficiency occurs later, and the final yield cannot be raised.

3. Why do cheap fertilizers have a better effect at the time than name-brand fertilizers after use?

Ammonium bicarbonate takes effect the same day, with a fertilizer effect period of 15 days; ammonium chloride takes effect in three days, with a fertilizer effect period of 25 days, then fertilizer deficiency occurs later. Urea takes effect in seven days, with a fertilizer effect period of 45 days. Compound fertilizer takes effect in ten days, with a fertilizer effect period of 90 days.

4. Cheap is expensive, and expensive is cheap; how is this saying explained?

Cheap fertilizer uses one bag of 100 jin per mu, 100 yuan/mu. Name-brand fertilizer uses 70 jin per mu, 90 yuan/mu, truly a good fertilizer that saves money.

5. Why does it feel like the yield has not improved much after using name-brand fertilizer?

The principle of nutrient return: however much grain you harvest, that is how much nutrient is absorbed from the soil, and good fertilizer returns that much. That is to say, if you use inferior fertilizer for three consecutive years and then immediately apply good fertilizer, it will be better than before, but compared with having applied good fertilizer from the start, if you apply good fertilizer for three consecutive years, then even if you do not apply fertilizer in one year, the yield will not be low.

6. Why do some small-factory fertilizers pass testing, yet their prices still differ from those of big factories?

Now the functional departments only test N, P, and K, so many small factories just need to do a good job on the surface; name-brand big factories also add various medium and trace elements, about 300 yuan per ton, to meet the needs of high crop yields.

7. Is there any difference between potassium sulfate type and potassium sulfate?

Potassium sulfate type is produced in the compound fertilizer production process by dechlorinating potassium chloride, and is produced according to potassium sulfate, with chloride ions at about 3 to 5%; potassium sulfate compound fertilizer is produced from pure potassium sulfate, with chloride ions below 3, and is suitable for various crops.

8. Is there any difference between compound fertilizer and blended fertilizer?

Compound fertilizer: it is high-tower granulation, ammonia-acid granulation, and slurry granulation, with a high utilization rate of 60%. Blended fertilizer: it is drum granulation and disc granulation, with a low utilization rate of 40%.

9. What is the matter with sulfur, the fourth major element?

The three major elements are nitrogen, phosphorus, and potassium. Now, according to national standards, when medium elements exceed four, the content can be labeled. Containing 7% sulfur, it is one of the 4 major elements necessary for crop growth, that is, farmers spend the same money to buy three elements, nitrogen, phosphorus, and potassium, and also buy sulfur, the fourth major element, which is a real bargain.

10. What is the difference between controlled-release fertilizer and compound fertilizer?

Controlled-release fertilizer is also compound fertilizer. The first generation is resin or sulfur-coated controlled release; the second generation is intelligent controlled-release factors added directly into the fertilizer, with a fertilizer effect period reaching 120 days and a utilization rate as high as 70%.

Therefore, when choosing compound fertilizer in the planting industry, it is still best not to be greedy for cheapness. Inferior fertilizer may make you happy for a while, but as long as a little time passes, your losses will only grow larger and larger!