Can someone mow the lawn?

I'm in my KSC2 cloned route. Wanting to expand the tracks into some of the various baseboards they've given us. In some areas I would like to get rid of those blowing in the wind grasses but don't know how to do it. Any suggestions?

Go into the topology tool, the one that you use to raise and lower the ground.
Click on the advanced button below.
Click on the Ground Brush.
Now use the lower-terrain button on the top right and adjust your brush size as you need.

This will erase the grass.

John you're a wonder. Thank you. I remembered some of those "Surveyor tools" had Advanced buttons. Had forgot about that one. Like I said elsewhere, its actually been quite some time (and versions) since I've done any route building in Trainz.