An interesting question. Alternate or 'biennial bearing' in fruit trees like mangoes is a characteristic feature of some cultivars. The flower buds of the next year are preformed in the vicinity of the developing fruits. Gibberellins (GAs) secretion by developing fruits inhibits the flower set in the buds of the next year. read more
An easy way to get annual bearing is to thin the flowers/young fruits on 50% branches. This shall result in moderate bearing every year on chronic biennial bearing trees. Annual bearing cultivars should be cultivated in consultation with local horticulturists of your area. read more