Fertilizers were not granulated in the past. The habit of fertilizer granulation comes from chemical fertilizers: on the one hand, it is to improve the utilization rate of chemical fertilizers, slow release of nutrients and reduce loss; on the other hand, it is to facilitate fertilization operation and mechanized fertilization, and also make fertilizer products beautiful and easy to sell.

Biological organic fertilizers generally do not need granulation, especially solid microbial fertilizers that absorb a large number of bacteria are not suitable for granulation. Even if active microorganisms are sprayed on the outside of granulated organic fertilizers, a considerable number of active microorganisms will be lost during the granulation or spray drying process. Factory granulation generally requires the addition of adhesives such as clay to the fertilizer, so that the fertility of the product is diluted. The granulation process increases the cost of organic fertilizer granulation equipment, labor, power, etc. For the sake of beauty, it often causes the product sales price to rise.

Biological organic fertilizers can promote soil loosening, and the microorganisms in them also need a loose environment to play a greater role. The granulation process is not good for microorganisms. Most of the fertilization processes in my country adopt soil covering agronomic operations, so it is a reasonable agronomic measure to directly apply biological organic fertilizers into the soil without granulation. Fruit trees, vegetables, tea, etc., which best reflect the characteristics of bio-organic fertilizers, are covered with soil after fertilization. Therefore, in the agronomic process of covering soil with fertilizers, there is no need for granulation. Direct use of dispersed bio-organic fertilizers can achieve satisfactory results in crop quality and yield, and save granulation costs. The price of non-granulated fertilizers is lower than that of granulated fertilizers. The use of non-granulated bio-organic fertilizers on field crops that need to improve soil properties is also very effective and has a high performance-price ratio.