Steamed bone meal contains

Steamed bone meal contains 30 - 35% P₂O₅.
Bone meal is primarily a source of phosphorus, which helps plants in bearing flowers and fruits. However, Steamed bone meal helps in the easier release of phosphorus in the soil. It is an excellent source of phosphorus, calcium and other important minerals including some nitrogen which aids in microbial activity to aid healthy top growth and stimulate root growth in plants.