PSB Bio Fertilizer Water Insoluble Formulation

PSB contains Bacillus megaterium & Bacillus Polymyxa bacteria which have attracted the attention of agriculturists as soil inoculums to improve the plant growth and yield. When PSB is used with rock phosphate, it can save about 50% of the crop requirement of phosphatic fertilizer. The use of phosphate solubilizing bacteria as inoculants increases Phosphorus uptake by plants. The phosphate solubilizing bacteria which solubilizes the inorganic soil phosphates of calcium and iron through production of several organic acids, hydroxyl and carboxyl groups, and chelating them to the bound phosphates and the available calcium.


PSB Water Insoluble

  • PSB, short for Phosphate Solubilizing Bacteria, comprises a powerful blend of Bacillus megaterium and Bacillus Polymyxa bacteria that have garnered significant attention from agriculturists as soil inoculants. The application of PSB has proven to be highly effective in enhancing plant growth and improving crop yields.
  • When PSB is used in conjunction with rock phosphate, it exhibits an impressive ability to save approximately 50% of the phosphatic fertilizer requirement for crops. This reduction in fertilizer usage not only results in cost savings for farmers but also contributes to a more sustainable and environmentally friendly approach to farming.

Mechanism of Action

  • PSB (phosphate solubilising bacteria) produces soluble phosphate in range of 30 to 40 kg/ha. Whenever phosphoric fertilizers are applied in soil its large quantity gets fixed as Tri-Calcium Phosphate.
  • As it is water insoluble, it becomes unavailable to crops. Due to PSB soil microorganisms having inherent capacity to dissolve part of this fixed phosphorus, makes it available to the crops. This enables converting insoluble phosphate compound in soluble form by secreting certain organic acids.
  • Storage condition :- Store in original container in clean, cool and dry place. Use before expiration date printed on package.


1. It solubilizes insoluble phosphate for easy uptake by crops.
2. Reduces 25 to 40% of phosphoric fertilizers cost & PSB Increases the level of available P2O5 in the soil.
3. It also improves the fertility of soil and reduces the use of chemical fertilizers . It is Harmless, Eco-friendly and low cost agro-input.


  • Soil Application: Apply 1 Kg Bio-Fertilizer For 1 Acer Land.


  • Cereal Crops: Rice, Bajra, Wheat, Maize, Oats, Barley, Rye, Millets, Sorghum,etc.
  • Fruit Crops: Banana, Avocados, Apple, Guava, Mango, Orange, Papaya, Grapes, Pomegranate, Dragon Fruit, Watermelon etc.

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