Question

what is apical dominance and which hormone controls this ? how farmer will overcome the disadvantage of it ?

Answer 1

Apical dominance is the phenomenon whereby the main, central stem of the plant is dominant over (i.e., grows more strongly than) other side stems; on a branch the main stem of the branch is further dominant over its own side branchlets.
phytohormones controls this

Answer 2

Answer:

Apical dominance refers to the phenomenon by which central or main stem of a plant grows at a faster rate as compared to the side stems.

It is achieved by when terminal buds and shoot apex inhibits the growth of lateral buds.  

It helps the plant to utilize most of the energy in growing upward or vertically. The vertical growth enables the plant to get more sunlight for photosynthesis.

The farmers overcome apical dominance by applying cytokinin (promotes cell division) and gibberellic acid to the axillary buds. It enables the lateral buds to grow rapidly even in presence of apical or terminal buds.