Question

why removal of weeds is so important

Answer 1

Weeding is so important because they compete with crops for nutrients,soil and sunlight.

Answer 2

$\bf{weeds}$

Actually these are unwanted plants grown along with the required crop plant.

Their removal is quite required because these weeds actually use up the nutrient supplied to the plant, and thus make plant to suffer.

Also it create a living race thier between who can live, effectively.

This will harm crop plant.