Yield advantage in an intercropping system occurs due to the development of

Intercropping is the practice of growing two or more crops on the same agricultural land in a season.
It is very beneficial as it leads to increased profit, ergonomic usage of the land and prevention of soil erosion. It also adds nutrients to the soil for the main crop.
It mainly adds an advantage in yield due to the development of temporal complementarity as well as spatial complementarity.