Complex organomineral biofertilizer with prolonged effect and increased static strength

Abstract. The study produced multilayer granules with a prolonged effect and increased static strength, containing mineral, organic and microbiological components. The mineral core is a complex NPK fertilizer, for the first layer, providing a prolonged effect, a sulfur-based composition was used, the second layer was a powder mixture of microorganisms and phosphogypsum used as a structuring additive to increase the static strength of the granules, and the third layer was a hydrophobic coating based on stearic acid, providing protection of microorganisms from premature activation when interacting with moisture.