After the organic fertilizer is processed by the fertilizer granulator, the fertilizer efficiency of the granular product lasts for a long time and has good solubility. So how to judge the quality of fertilizer products by judging the solubility of particles?
The organic fertilizer processed by the fertilizer production line is grayish brown or dark black with loose powder, while the inferior organic fertilizer is bright black with dense powder. Fake and inferior organic fertilizer is often higher density than real organic fertilizer because it is mixed with more inferior impurities. Of course, under normal circumstances, a small amount of impurities is inevitable.
2. Dissolve with water
Dissolve about 30-50g organic fertilizer in transparent glass, stir with glass rod for 1 minute, and then let stand for 10 minutes. Pay attention to the color in the cup. The inferior organic fertilizer is still black and turbid, while the real organic fertilizer is completely fermented and decomposed after being treated by the dumper, and it will show different colors of brown from top to bottom. Most of the impurities deposited in the light gray area at the bottom of the cup are sand and stone; the brown part in the middle area is mainly organic matter; the top layer is incompletely decomposed fibrous grass and cut tobacco.
3. Judgment of fertilizer efficiency
The lighter the color of the aqueous solution, the worse the fertilizer efficiency (light and light yellow fertilizers have low efficiency; brown fertilizers have good effect).
3.1. The aqueous solution is completely browned within 1 hour, indicating that the organic fertilizer or bio-organic fertilizer is excessively decomposed, and the fertilizer effect is quick and long-acting, but weak. The crop will lose its strength in the middle and late stages of growth, and it may be necessary to increase the application rate in the later stages of growth.
3.2. After 1 day, the aqueous solution did not change much, and the color became lighter, indicating that organic fertilizer or bio-organic fertilizer has poor efficiency, low solubility, and low organic matter content.
3.3. The aqueous solution gradually turns black within 1 day, and then completely turns brown, indicating that the organic fertilizer or bio-organic fertilizer has good effect, quick effect, and late effect.
4. Burn with fire
Poor quality organic fertilizer is more difficult to burn because of its low organic matter content or too many impurities, or it will emit a lot of black smoke and a large amount of residue after combustion, while the really good organic fertilizer is easy to burn. The smoke after combustion is gray (brown), and the residue is mostly a small amount of gray black powder.
5. Soil dissolution rate
Generally speaking, high quality organic fertilizer is processed by rotary drum granulator, organic fertilizer granulator and other equipment. It can activate soil and improve structure, and has good long-term fertilizer effect. The poor quality organic fertilizer buried in the soil for several months is insoluble and has no value for soil improvement.