The runner backs have to be able to run on short grass
There is no limit, but size is important in the NFL.
Naturally, like any other grass or plant that has its roots in the soil. When the grass and/or legumes reach a certain height or stage in their life cycle, they are cut, dried, then collected as hay.
probably turf or grass
Grass
the higher the grass the higher the bounce.
NO you don't have to be a certain height or weight to be knighted ...
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8mm
No
1.85 cm is the perfect height
About a foot (about a sixth of your total height). (also - about the size of a football).
Probably fake grass, like that they put in the football stadiums.