They also decompose the organic residue by immobilization and mineralization thus maintaining equilibrium with soil solution P pools.Phosphorous is one of the major plant’s nutrients in the soil.It is a constituent of plant cells, essential for cell division and development of the growing tip of the plant.For this reason, it is vital for seedlings and young plants. That help in crop growth & increasing productivity.PSB fertilizer can facilitate the transformation of insoluble P to available p in the soil; this mechanism will increase available P concentration and soil p availability to crops, contributing to crop growth and yield

RECOMMENDATIONIt is used before flowering and fruiting stage in order to Increase the yield.Fixation of soil phosphorus increases with time of contact between soluble phosphorus and soil particles. Consequently, more efficient utilization of fertilizer phosphorus is generally obtained by applying the fertilizer shortly before planting the crop.