How to produce 20:10:10 NPK granular fertilizer?

Producing 20:10:10 NPK granular fertilizer involves a precise combination of nitrogen (N), phosphorus (P), and potassium (K) in a ratio of 20:10:10. This balanced fertilizer is crucial for promoting optimal plant growth, flowering, and fruiting. In this comprehensive guide, we will walk through the step-by-step process of manufacturing this essential granular fertilizer.

Raw Material Selection:

The first step in producing 20:10:10 NPK granular fertilizer is selecting high-quality raw materials. For nitrogen, ammonium sulfate or urea can be used; for phosphorus, single superphosphate is a common choice, and potassium can be sourced from potassium chloride or potassium sulfate. Ensure that these materials meet the required purity standards to achieve the desired nutrient balance.

Blending the Ingredients:

The precise blending of raw materials is crucial to achieve the 20:10:10 NPK ratio. A mixer is employed to homogeneously combine nitrogen, phosphorus, and potassium sources. Careful measurement and control of the blending process are essential to avoid any deviations from the target nutrient ratio.

Granulation Process:

Once the ingredients are thoroughly mixed, the next step is granulation. Granulation involves forming the blended material into small, uniform granules. This is typically done using a granulation machine, which shapes the fertilizer mixture into the desired particle size. The size of the granules can be adjusted to meet specific application requirements. For this, rotary drum granulation equipment and pan granulation are the best choices for you.

Drying the Granules:

After granulation, the fertilizer granules must undergo a drying process to remove excess moisture. This is crucial for preventing clumping and ensuring the granules remain free-flowing. Drying can be achieved through various methods, such as rotary drum drying or fluidized bed drying, depending on the scale of production.

Cooling and Screening:

Following the drying process, the granules are cooled to ambient temperature. Cooling is essential for enhancing the physical integrity of the granules and preventing them from breaking during subsequent handling and packaging. Additionally, screening the granules to remove any oversized or undersized particles, ensuring a consistent product size.

Coating (Optional):

Coating the granules is an optional step that may be included to enhance certain properties of the fertilizer, such as controlled release or improved nutrient absorption. Coating materials can include polymers or special coatings designed to protect the granules from environmental factors and optimize nutrient release.

Quality Control:

Throughout the production process, rigorous quality control measures must be implemented. Regular testing of samples ensures that the final product adheres to the 20:10:10 NPK ratio and meets all necessary quality standards. This may involve laboratory analysis of nutrient content, granule size distribution, and other relevant parameters.

Packaging and Distribution:

The final step in the production of 20:10:10 NPK granular fertilizer involves packaging and distribution. The fertilizer is packaged in bags or other containers suitable for easy handling and application. Proper labeling with clear instructions for use and safety precautions is essential to inform end-users about the product’s specifications.


Producing 20:10:10 NPK granular fertilizer requires precision, from raw material selection to quality control and packaging. Following these systematic steps ensures the production of a high-quality fertilizer that can contribute to robust plant growth and improved agricultural yields. As with any fertilizer manufacturing processing, ongoing optimization and adherence to industry best practices are key to achieving consistent and reliable results.