Dr. Jackie Lyn Guevara

all throughout so that's why FIFA is really paying much attention in the grass is just having that ball roll having that consistency the bounce is similar to a potting green when you're doing your pot it's like oh we need to be really consistent and that have like a good role in it yes you can do that you can make it feel the same for all the players

Yeah, so we try.

That's the research as we try to do that as much as we can.

So FIFA has this FIFA specification.

They have FIFA standards.

First is the grass should be natural.

And not a lot of people are aware of that.

So having a natural grass is very important.

And then what we did was just make a recipe or guidelines for different sod farmers and field managers in North America, across North America.

So what we do is we tested like different kind of grasses, different mixtures, and see if at the end they will have the same parameters.

For example, surface hardness or how much traction should be on the grass.

So University of Tennessee, they

created what we call like a flex machine so basically it's a machine with a 3d printed foot in it it has a lot of sensors you can use different cleats on it and then from there it can make like a like a divot on the surface and it will give us different parameters like surface traction displacement so we have the same consistent data all throughout

So that's a great question.

So how do we decide which grass to use?

So there are different aspects of this.

If it's outdoors and if it's in a cool season area, we use Kentucky blowgrass and perennial ryegrass mix.

And that recipe I'm really proud of because that's my PhD dissertation.

But for outdoor, warm season, we're using Bermuda grass.

So those are the grasses.