Simple Process to make slow release granular fertilizer

The good application effect of chemical fertilizer largely depends on its physicochemical state. For example, the active component phosphoric acid in calcium superphosphate is the state of calcium phosphate. Soluble in water and can be completely absorbed by plants. However, just because it is a quick acting fertilizer, plants often lose part of it before they can fully absorb it.

In addition, the phosphorylation energy of calcium superphosphate and impurities in soil can not absorb and utilize compounds such as iron phosphate and aluminum phosphate. The smaller the powder of calcium superphosphate, the larger the contact area with soil. Therefore, the greater the amount of compounds that cannot be absorbed by impurities in the soil, the more fertilizer loss. Need machines to make slow release fertilizer granules? Welcome go to

Compost Turner Tunnel Type
Compost Turner Tunnel Type

Because the physical state of slow-release granular fertilizer is solid particles, the above shortcomings can be avoided, nutrient loss can be reduced and fertilizer efficiency can be prolonged. Therefore, in the process of fertilizer manufacturing, the treatment of granulator is very necessary.

Granulation equipment is the most commonly used granulation equipment in the manufacturing process of granular fertilizer

Disc granulator is a well-known fertilizer granulation equipment. The whole is in a swashplate shape. The powdery materials roll in the plate with the bottom of the plate, and the materials adhere to each other to form spherical particles after being affected with moisture. The principle of the granulator is like a snowball. It depends on the viscosity of the material itself to bond and grow.

When the particles grow to a certain extent, they will come out of the plate and enter the next processing process. If the particle size requirements cannot be met, it shall remain in the pan and continue granulation until the requirements are met.

The drum granulator also adopts a similar granulation principle, but the disc granulator is an open structure and the drum granulator is a cylinder, but both are the principle of continuous combination of powdery materials with the help of water.

Granular fertilizer with appropriate particle size. Drum granulator has a wide range of raw materials and can produce organic fertilizer, compound fertilizer and other fertilizers.

Fertilizer Wiki

Crops prone to molybdenum deficiency:

In addition, rape, cauliflower, corn, sorghum, millet, cotton, sugar beet also have a good response to molybdenum fertilizer.
What are the consequences of blind fertilization?

1. The decline of land power affects the sustainable development of agriculture.
2. The utilization rate of chemical fertilizer is low, and the environment and groundwater are polluted.
3. High cost and low income.
4. High capacity, low quality.

Iron sensitive crops

There are soybean, peanut, sorghum, beet, spinach, tomato, apple and so on.

Application technology of iron fertilizer.Spraying: 0.2% – 1% ferrous sulfate;
Root application: ferrous sulfate and organic fertilizer were mixed in the ratio of 1:10-20 and applied to fruit trees.
High pressure injection: 0.3% – 0.5% ferrous sulfate solution was directly injected into the xylem of tree trunk.

Manganese sensitive crops

Legumes, wheat, potatoes, onions, spinach, apples, strawberries, etc.

Application technology of manganese fertilizer
Spraying: the concentration of fruit trees is 0.3% – 0.4%, legumes is 0.03%, rice is 0.1%.

Seed dressing: 4 grams of manganese sulfate per kilogram of seeds for gramineous crops, 8-12 grams for beans and 16 grams for sugar beets.

Zinc sensitive crops

There are corn, rice, beet, flax, cotton, apple, pear and so on.
Applying zinc fertilizer to these crops usually has good fertilizer utilization efficiency.

Large Capacity Compost Turner for Cow Manure Composting
Large Capacity Compost Turner for Cow Manure Composting

Application technology of zinc fertilizer

Base: 1-2kg ZnSO4 per 667m2 could be mixed with physiological acid fertilizer;

Topdressing: 0.02% – 0.1% zinc sulfate solution was applied to common crops, and the concentration in corn and rice was 0.1% – 0.5%;
Seed soaking: 0.02% – 0.1%, soaking for 12 hours;
Seed dressing: 2g-6g zinc sulfate per kg seed.

Boron deficient crops

The current crop vacancy in China is obviously rape, boron beet, cotton, cabbage, cabbage, radish, celery, cucumber, beans, apple, pear, peach, etc.

To masterĀ  the thechnology for organic and inorganic fertilizer roduction, go to