No. Most grasses have fibrous roots.
tap root system
Corn is a grass, and the grains harvested from this plant grow above ground. Carrots are not a grass but a tap root, and it is the tap root that we like to eat. We do not eat the roots of corn.
Bamboo typically has a network of fibrous roots rather than a tap root. These fibrous roots spread out close to the surface of the soil to help support the tall bamboo stalks and absorb nutrients efficiently.
wheat plant have fiberous root
I would say "no" but I'm not a grass expert. Also I'm not sure if by "most" you mean most species of grass, most individual grass plants, greater than 51% or what. But I do know that there are a whole lot of grasses that don't have a main tap root.
there are two different types of roots. they are fiborous roots and tap root. examples to fibrous root grass.
Tap root
IT has a long tap root while grass has short fibrous roots.
it grows in tap root but some try it is fibres root i recommed that you use tap root thought
tap root
They are tap root
Its a.......... TAP ROOT! :D