What is the process of bulk blending fertilizer?

BB fertilizer, as a customized blended fertilizer, relies on "precise proportioning" and "uniform mixing" in its production process. This preserves the effectiveness of the raw materials while flexibly adapting to the needs of different crops. Although the entire bulk blend fertilizer production line does not involve complex chemical synthesis steps, it demands strict process control.

Raw material selection is fundamental to production. Producers must carefully select high-quality single-element or compound fertilizers as raw materials, commonly including urea, potassium chloride, and diammonium phosphate. Simultaneously, micronutrients such as calcium, magnesium, and sulfur are added as needed. All raw materials must undergo drying and sieving to remove moisture and impurities, ensuring uniform particle drying and preventing clumping after mixing, which would affect application efficacy.

Formulation design is the core competitiveness of BB fertilizer. Technicians combine the nutrient requirements of the target crop with soil fertility testing data, using specialized software to calculate the optimal ratio of nitrogen, phosphorus, potassium, and micronutrients. For example, corn requires high nitrogen during its growth period, so the proportion of urea in the formula will be increased accordingly; fruit trees require more phosphorus and potassium, so the proportion of diammonium phosphate and potassium chloride will be increased, achieving "one fertilizer per plot, one formula per crop."

The mixing and processing stage tests the precision of the process. After screening, the raw materials are fed into the BB fertilizer blender via an automatic batching system. The equipment uses a specific method to thoroughly mix the different granular fertilizers. To prevent granule separation, the mixing speed and time must be controlled to ensure that each finished granule contains a balanced amount of nutrients. Some production lines also add anti-caking agents to extend the fertilizer's shelf life.

Finished product testing and packaging are the final quality control steps. Staff will sample and test the mixed fertilizer to confirm that the nutrient content meets the formula standards, and also check the granule uniformity and moisture content. Qualified BB fertilizer is then packaged into bags of different sizes, labeled with the formula, applicable crops, and application methods for farmers' convenience.

From raw materials to finished product, the BB fertilizer production process revolves around "precision" and "flexibility," reflecting both the modern agricultural demand for customized fertilizers and showcasing the scientific ingenuity behind the simple process.