Bone Meal is a raw, crushed Cattle bones below the size of 1.5 mm.

It has the following advantages.

1: It is a natural source of phosphate fertilizer which provides ions that can be readily absorbed by plants compared to chemical fertilizers.
2: Contains comparable amount of total 'P' (about 7-8%) to that in single Superphosphate (SSP) (about 9%P) Contains Nitrogen as well (3.5 - 4%) which can be expected to give a greater crop yield compared to individual application of 'P' and 'N'
3: The ability of slow release of nutrients makes it more efficient than soluble fertilizers.