Q.To get a carpet like grass lawns are mowed regularly. Is there any scientific explanation for this?

Yes, there is a clear scientific reason. Regular mowing repeatedly removes the growing tips of the grass shoots, and because the apical (terminal) bud normally suppresses the lateral buds below it — apical dominance — removing that apex again and again keeps releasing new lateral buds to sprout. This constant production of side shoots is exactly what produces the dense, carpet-like, low, even lawn that regular mowing is meant to ac …

In most higher plants, the growing apical bud suppresses the growth of the lateral (axillary) buds below it, a phenomenon called apical dominance. When the apical bud is removed by decapitation, this suppression is lifted and the lateral buds are able to sprout and grow, producing more side shoots. This principle is deliberately used in tea plantations and hedge-making, where repeated trimming keeps forcing out new lateral growth so the plant stays dense and bushy rather than tall and thin. …

Method: Recognising an Apical-Dominance-Based Horticultural Practice

This method applies to any question asking "why does a gardening/farming practice (trimming, mowing, pruning, pinching) produce a bushier or denser plant?"

Steps

Step 1: Identify what the practice physically removes

Ask what part of the plant the practice cuts away. If the answer is "the growing tip / terminal shoot / apical bud" — as mowing does to grass shoots — you are dealing with apical dominance.

Step 2: Recall the underlying rule

The apical bud maintains a higher auxin concentration than lateral buds, and this auxin actively suppresses lateral bud growth while the apex is intact.

Step 3: Apply cause and effect to the specific scenario …