What is the difference between turf and grass? Specifically the artificial type. And what is the proper word for the artificial type such as the one used on football fields/tennis courts? Are mixes of artificial materials and natural grass/turf materials used on sports fields and courts?
Perhaps this is a possible definition:
Grass is the plant.
Turf is the area where grass is grown and cut twice a week with a lawn mower. Usually, turf is made from a mix of different types of grass varieties, depending on the use (garden vs. football field). Turf may be seeded directly or pre-cultivated (e.g., rolled turf)
Artificial turf is plastic. You won't mix artificial and naturally grown grass, because it doesn't make sense really. Artificial turf is based on plastic-mats and I think it will not be easy for grass-plants to get through that mat with their roots.