It depends. Do you know if these are wild speces for sure and/or native? Grasses are notoriously difficult to ID, so if not it is ok. A lot of grass kind of likes the abuse, it colonises disturbed areas as a pioneer species as long as the soil isn't bone dry, you are fine with walking on it even. This keeps back other plants from overtaking the grasses. There are some caviats, depending on your location. If you are trying to encourage prarie grasses, they like really crappy, shitty soil. Clay with medium topsoil. Can you give me more of an idea of what you are trying to do with it/location/etc? Feel free to DM, my bestie is a specialist with grasses.