Simultaneous fruiting is possible nowadays with flower inducer. By spraying it to mango trees, not just more, but bigger fruits are produced.
Potassium nitrate is the generic name of chemical flower inducer in mango, and the chemical symbol for this compound is or KNO;. It contains 13% nitrogen and 46% potash, hence it is also called 13-0-46. KNO supplies the potassium requirement of the tree and in the process, induces flowering.
Another flower inducer used, nowadays is calcium nitrate (CaN). It contains 45% calcium and 15% nitrogen. It is affordable, yet the effect is just the same.