AAYNA PSB GR. contains phosphate solubilizing bacteria Bacillus species which secretes organic acids that help to convert the insoluble tricalcium phosphate & rock phosphate in the soil to a simpler soluble form, making it available to plants. AAYNA PSB GR. tolerates a large range of soil pH & temperature and its application improves the general health of the soil, ensures better root development, and increases phosphate uptake by plants. AAYNA PSB GR is available in liquid & granular formulation.