At Brodak there are asphalt (or is it concrete) take off pads. Sometime there's a need to hop it off, inelegant, then there is the need to miss the pad, or hit the pad near the beginning, when sticking a landing. The rest of the circle is leveled and groomed grass. Nice thing about grass is that generally if you loose it, even from 65' up, the engine stays in once piece. I guess the best judgement of landings and takeoffs requires smooth asphalt.